Hydroxypropyl methylcellulose
9004-65-3 · E 464 · Hydroxypropyl methyl cellulose · E464 · 464 · (2R,3R,4S,5R,6R)-2,3,4-trimethoxy-6-(methoxymethyl)-5-[(2S,3R,4S,5R,6R)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxyoxane;1-[[(2R,3R,4S,5R,6S)-3,4,5-tris(2-hydroxypropoxy)-6-[(2R,3R,4S,5R,6R)-4,5,6-tris(2-hydroxypropoxy)-2-(2-hydroxypropoxymethyl)oxan-3-yl]oxyoxan-2-yl]methoxy]propan-2-ol · Hydroxypropyl methyl cellulose · Hydroxypropyl methylcellulose · Hidroksipropil metil celuloza · hidroksipropilmetil celuloza · Hidroksipropilmetilceliuliozė · Hidroksipropilmetilceluloze · HIDROXI-PROPIL-METIL-CELLULÓZ · Hidroxipropil-metil-cellulóz · Hidroxipropilmetilcelulosa · Hidroxipropilmetilcelulose · Hidroxipropilmetilceluloză · Hydroksipropyylimetyyliselluloosa · Hydroksypropylometyloceluloza · Hydroxipropylmetylcellulosa · Hydroxypropyl methyl cellulose · Hydroxypropylmethylcellulose · Hydroxypropylmethylcelulosa · Hydroxypropylmetylcelulóza · Hüdroksüpropüülmetüültselluloos · Idrossi-propil-metilcellulosa · IDROSSIPROPILMETILCELLULOSA · ĊELLULOŻA METILIKA IDROSSIPROPILIKA · Ċelluloża tal-metil idrosiipropil · Υδροξυπροπυλομεθυλοκυτταρίνη · Хидроксипропил метил целулозаE number E464INS 464CAS 9004-65-3
Listed as an emulsifier, a thickener and a stabiliser by Canada, Codex and the US.
Listed as emulsifiers (CA, US, Codex) · thickeners (CA, US, Codex) · stabilisers (CA, US, Codex) · glazing and surface-finishing agents (US, Codex) · humectants (US) · anticaking agents (US) · bulking agents (Codex) · texturisers (US) · processing aids (US)
- Canada: Emulsifying agent — Health Canada, List of Permitted Emulsifying, Gelling, Stabilizing or Thickening Agents (List 4)
- Canada: Emulsifying, stabilizing or thickening agent — Health Canada, List of Permitted Emulsifying, Gelling, Stabilizing or Thickening Agents (List 4)
- United States: Emulsifier or emulsifier salt — FDA, Substances Added to Food: HYDROXYPROPYL METHYLCELLULOSE
- Codex Alimentarius: Emulsifier — CXS 192-1995 Table One, INS 464
- Canada: Emulsifying, stabilizing or thickening agent — Health Canada, List of Permitted Emulsifying, Gelling, Stabilizing or Thickening Agents (List 4)
- Canada: Thickening agent — Health Canada, List of Permitted Emulsifying, Gelling, Stabilizing or Thickening Agents (List 4)
- United States: Stabilizer or thickener — FDA, Substances Added to Food: HYDROXYPROPYL METHYLCELLULOSE
- Codex Alimentarius: Thickener — CXS 192-1995 Table One, INS 464
- Canada: Emulsifying, stabilizing or thickening agent — Health Canada, List of Permitted Emulsifying, Gelling, Stabilizing or Thickening Agents (List 4)
- Canada: Stabilizing agent — Health Canada, List of Permitted Emulsifying, Gelling, Stabilizing or Thickening Agents (List 4)
- United States: Stabilizer or thickener — FDA, Substances Added to Food: HYDROXYPROPYL METHYLCELLULOSE
- Codex Alimentarius: Stabilizer — CXS 192-1995 Table One, INS 464
- United States: Surface-finishing agent — FDA, Substances Added to Food: HYDROXYPROPYL METHYLCELLULOSE
- Codex Alimentarius: Glazing agent — CXS 192-1995 Table One, INS 464
- United States: Humectant — FDA, Substances Added to Food: HYDROXYPROPYL METHYLCELLULOSE
- United States: Anticaking agent or free-flow agent — FDA, Substances Added to Food: HYDROXYPROPYL METHYLCELLULOSE
- Codex Alimentarius: Bulking agent — CXS 192-1995 Table One, INS 464
- United States: Texturizer — FDA, Substances Added to Food: HYDROXYPROPYL METHYLCELLULOSE
- United States: Processing aid — FDA, Substances Added to Food: HYDROXYPROPYL METHYLCELLULOSE
Hydroxypropyl methylcellulose, or HPMC, is a thickener and film former used in gluten-free baking, sauces and as the material of vegetarian capsule shells.
Where it is and isn’t permitted
| Jurisdiction | Status | Scope and limits | Citation |
|---|---|---|---|
| Australia and New Zealand | Permitted, with conditions | 54 food categories no numerical limit (good manufacturing practice) Show every food category
| Food Standards Code, Schedule 15, S15—5and 53 further provisionsretrieved 2026-10-17 |
| Canada | Permitted | no numerical limit (good manufacturing practice) 4 permitted uses Show every permitted use
| Health Canada, List of Permitted Emulsifying, Gelling, Stabilizing or Thickening Agents (List 4)and 3 further provisionsretrieved 2026-10-17 |
| European Union | Permitted, with conditions | 72 food categories highest permitted level 10 mg/l Show every food category
| Regulation (EC) No 1333/2008, Annex IIand 71 further provisionsretrieved 2026-10-18 |
| Great Britain | Permitted, with conditions | 70 food categories highest permitted level 10 mg/kg or mg/l Show every food category
| Assimilated Regulation (EC) No 1333/2008and 69 further provisionsretrieved 2026-10-18 |
| Japan | Permitted, with conditions | Designated additive: Appended Table 1, item 328, ヒドロキシプロピルメチルセルロース (“Hydroxypropyl Methylcellulose” in the unofficial English translation). …Designated additive: Appended Table 1, item 328, ヒドロキシプロピルメチルセルロース (“Hydroxypropyl Methylcellulose” in the unofficial English translation). Standards for use — Specifications and Standards for Foods, Food Additives, etc. (MHW Notification No. 370 of 1959), Part II (Food Additives), F (Standards for use): The Notification sets no standard for use (使用基準) for this additive, so it is not restricted there to particular foods or amounts. Compositional specifications for this additive, in the same Notification, are not imported and are not shown here; nor are the general rules in F 添加物一般, which apply to every additive. | Regulations for Enforcement of the Food Sanitation Act (MHW Ordinance No. 23 of 1948), Appended Table 1retrieved 2026-10-18 |
| South Korea | Permitted, with conditions | Designated food additive: Standards and Specifications for Food Additives, Part III, 1. …Designated food additive: Standards and Specifications for Food Additives, Part III, 1. 일반식품첨가물 (general food additives), 히드록시프로필메틸셀룰로스 (“Hydroxypropylmethyl Cellulose”, the English the Code prints beside it). Main use (주용도) of 히드록시프로필메틸셀룰로스: 증점제, 안정제. Standard for use (사용기준) of 히드록시프로필메틸셀룰로스: (1) [to be used under the general standard for use in II. 2. 1), the minimum amount that achieves the technical effect, with no limit set for this additive in particular] “II. 2. 1)의 규정에 따라 사용하여야 한다.” The Korean is the standard as published. There is no official English translation of the current Code (the English version on MFDS’s website is the 2020 edition and has no legal effect); the English in square brackets is this site’s description of what each sentence does, not a translation of the foods or the levels. Compositional specifications (Part IV) are not imported, nor are the general standards in Part II, which apply to every additive. | Standards and Specifications for Food Additives (식품첨가물의 기준 및 규격), MFDS Notification, Part III (Standards for use, by item)retrieved 2026-10-18 |
| United States | Permitted, with conditions | 21 CFR 172.874retrieved 2026-10-17 | |
| Codex Alimentarius | Permitted, with conditions | 18 food categories no numerical limit (good manufacturing practice) Show every food category and its notes
| CXS 192-1995 Table Three, INS 464and 18 further provisionsretrieved 2026-09-07 |
How much is permitted
A listing usually limits the quantity as well as the food. Only one of the forms that takes is a figure: quantum satis and good manufacturing practice permit the amount the technological effect requires and no more, which is a limit rather than the absence of one. Figures below are the range across every food category this page is listed in, and categories differ between regulators — see how much is permitted.
| Australia and New Zealand | — | 54 GMP |
|---|---|---|
| Canada | — | 4 GMP |
| European Union | 10 mg/kg | 1 numeric limit, 46 several limits, 3 quantum satis, 22 no quantity stated |
| Great Britain | 10 mg/kg | 1 numeric limit, 69 quantum satis |
| Japan | — | 1 no quantity stated |
| South Korea | — | 1 no quantity stated |
| United States | — | 1 no quantity stated |
| Codex Alimentarius | — | 19 GMP |
GRAS notices to the FDA
A GRAS notice is a company’s conclusion that a substance is generally recognised as safe for the use it describes. FDA’s letter responds to that conclusion, for that notifier and that use. It is not a listing in 21 CFR, and it is not counted as a US permission above. The substance and use are as FDA’s inventory words them; this site matched the notice to this page by exact name.
GRN No. 190 · Hydroxypropyl methylcellulose · The Dow Chemical Company
Intended use: Use in food in general including meat products
FDA’s response (2006-04-06): At the notifier's request, FDA ceased to evaluate this notice
What it is made from
Made by treating purified cellulose with methylating agents and propylene oxide. It is the usual plant-based alternative to gelatin for capsules.
- Vegan
- Vegetarian
Compare other additives on the dietary indexes.
- CAS registry number
- 9004-65-3
The two specifications, compared
The European Union sets identity and purity by regulation; JECFA publishes its own through FAO, advisory until a country adopts it. Both documents are below in full. These are the parameters each puts a number on.
| Parameter | European Union | JECFA |
|---|---|---|
| Assay | no less than 19 % | no less than 19 % |
| Loss on drying | no more than 10 % | no more than 10 % |
| Sulphated ash | no more than 1.5 % | no more than 1.5 % |
| Lead | no more than 0.1 mg/kg | no more than 2 mg/kg |
| Arsenic | no more than 0.1 mg/kg | — |
| Mercury | no more than 0.1 mg/kg | — |
| Cadmium | no more than 0.1 mg/kg | — |
One parameter differs between the two documents. A difference is not a disagreement about safety: the two are revised on their own cycles, and an assay or a drying loss can be measured against a different preparation of the substance, which is why only the contaminant ceilings are marked. Within the EU the EU's figure is the one that binds.
How the EU defines it
The legal specification an additive must meet to be sold as this E number in the EU — what it is, how it may be made, and the purity it must reach. From Commission Regulation (EU) No 231/2012.
E 464 Hydroxypropyl methyl cellulose
Hydroxypropyl methyl cellulose is cellulose obtained directly from strains of fibrous plant material and partially etherified with methyl groups and containing a small degree of hydroxypropyl substitution
Assay, identification and purity criteria
Description and assay
- CAS number
- 9004-65-3
- Einecs
- 618-389-6
- Chemical name
- 2-Hydroxypropyl ether of methylcellulose
- Chemical formula
- The polymers contain substituted anhydroglucose units with the following general formula: C₆H₇O₂(OR₁)(OR₂)(OR₃), where R₁, R₂, R₃ each may be one of the following: — H — CH₃ — CH₂CHOHCH₃ — CH₂CHO (CH₂CHOHCH₃) CH₃ — CH₂CHO[CH₂CHO (CH₂CHOHCH₃) CH₃]CH₃
- Molecular weight
- From about 13 000 to 200 000
- Assay
- Content not less than 19 % and not more than 30 % methoxyl groups (-OCH₃) and not less than 3 % and not more than 12 % hydroxypropoxyl groups (-OCH₂CHOHCH₃), on the anhydrous basis
- Description
- Slightly hygroscopic white or slightly yellowish or greyish odourless and tasteless, granular or fibrous powder
Identification
- Solubility
- Swelling in water, producing a clear to opalescent, viscous, colloidal dispersion. Insoluble in ethanol
- Gas chromatography
- Determine the substituents by gas chromatography
- pH
- Not less than 5,0 and not more than 8,0 (1 % colloidal dispersion)
Purity criteria
- Loss on drying
- Not more than 10 % (105 °C, 3 hours)
- Sulphated ash
- Not more than 1,5 % for products with viscosities of 50 mPa.s or above Not more than 3 % for products with viscosities below 50 mPa.s
- Propylene chlorohydrins
- Not more than 0,1 mg/kg
- Arsenic
- Not more than 0,1 mg/kg
- Lead
- Not more than 0,1 mg/kg
- Mercury
- Not more than 0,1 mg/kg
- Cadmium
- Not more than 0,1 mg/kg
How JECFA defines it
The international specification for identity and purity, prepared by the Joint FAO/WHO Expert Committee on Food Additives and published by FAO. It is a different document from any above, written by a different body and revised on its own cycle; it is advisory, and a country adopts it or does not.
INS 464 Hydroxypropylmethyl cellulose
Hydroxypropylmethyl cellulose is a methyl cellulose modified by treatment with alkali and propylene oxide by which a small number of 2-hydroxypropyl groups are attached through ether links to the anhydroglucose units of the cellulose. The article in commerce may be further specified by viscosity.
Synonyms: INS No. 464
Assay, identification and purity criteria
Description and assay
- Specification history
- Prepared at the 74 th JECFA (2011) and published in FAO JECFA Monographs 11 (2011), superseding the specifications prepared at the 63 rd JECFA (2004), published in the Combined Compendium of Food Additive Specifications, FAO JECFA Monographs 1 (2005). A group ADI ”not specified” for modified celluloses (ethyl cellulose, ethyl hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, methyl cellulose, methyl ethyl cellulose, and sodium carboxymethyl cellulose) was established at the 35 th JECFA (1989).
- Chemical names
- Hydroxypropylmethyl cellulose, 2-hydroxypropyl ether of methyl cellulose
- C.A.S. number
- 9004-65-3
- Chemical formula
- [C6H7O2(OH)x(OCH3)y(OCH2CHOHCH3)z]n where z = 0.07 - 0.34 y = 1.12 - 2.03 x = 3-(z + y): (z + y = degree of substitution)
- Structural formula
- where R = H or CH3 or CH2CHOHCH3
- Formula weight
- Unsubstituted structural unit: 162.14 Structural unit with 1.19 degree of substitution: approx. 180 Structural unit with 2.37 degree of substitution: approx. 210 Macromolecules: from about 13,000 (n about 70) up to about 200,000 (n about 1000)
- Assay
- Not less than 19% and not more than 30% of methoxy groups (-OCH3) and not less than 3% and not more than 12% hydroxypropoxy groups (-OCH2CHOHCH3), on the dried basis
- DESCRIPTION
- Hygroscopic white or off-white powder, or granules or fine fibres
- FUNCTIONAL USES
- Emulsifier, thickening agent, stabiliser
- METHOD OF ASSAY
- Determination of the content of hydroxypropoxy groups Apparatus The apparatus for hydroxypropoxy group determination is shown in the accompanying diagram. The boiling flask, D, is fitted with an aluminium foil-covered Vigreux column, E, on the sidearm and with a bleeder tube through the neck and to the bottom of the flask for the introduction of steam and nitrogen. A steam generator, B, is attached to the bleeder tube through Tube C, and a condenser, F, is attached to the Vigreux column. The boiling flask and steam generator are immersed in an oil bath, A, equipped with a thermo-regulator such that a temperature of 155° and the desired heating rate may be maintained. The distillate is collected in a 150 ml beaker, G, or other suitable container. Figure. Apparatus for hydroxypropyl determination Procedure Accurately weigh about 100 mg of the sample, previously dried at 105° for 2 h, transfer into the boiling flask and add 10 ml of chromium trioxide solution (60 g in 140 ml of water). Immerse the steam generator and the boiling flask in the oil bath (at room temperature) to the level of the top of the chromium trioxide solution. Start cooling water through the condenser and pass nitrogen gas through the boiling flask at the rate of one bubble per sec. Starting at room temperature, raise the temperature of the oil bath to 155° over a period of not less than 30 min, and maintain this temperature until the end of the determination. Distil until 50 ml of the distillate is collected. Detach the condenser from the Vigreux column, and wash it with water, collecting the washings in the distillate container. Titrate the combined washings and distillate with 0.02 N sodium hydroxide to a pH of 7.0, using a pH meter set at the expanded scale. Note : Phenolphthalein TS may be used for this titration instead of pH meter, if it is also used for all standards and blanks. Record the volume, Va of the 0.02 N sodium hydroxide used. Add 500 mg of sodium bicarbonate and 10 ml of dilute sulfuric acid TS, and then after evolution of carbon dioxide has ceased, add 1 g of potassium iodide. Stopper the flask, shake the mixture, and allow it to stand in the dark for 5 min. Titrate the liberated iodine with 0.02 N sodium thiosulfate to the sharp disappearance of the yellow colour, confirming the end-point by the addition of a few drops of starch TS. Record the volume of 0.02 N sodium thiosulfate required as Ya. Make several reagent blank determinations, using only the chromium trioxide solution in the above procedure. The ratio of the sodium hydroxide titration (Vb) to the sodium thiosulfate titration (Yb), corrected for variation in normalities, will give the acidity-to-oxidizing ratio, Vb/Yb= K, for the chromium trioxide carried over in the distillation. The factor K should be constant for all determinations. Make a series of blank determinations using 100 mg of methyl cellulose (containing no foreign material) in place of the sample, recording the average volume of 0.02 N sodium hydroxide required as Vm and the average volume of 0.02 N sodium thiosulfate required as Ym. Calculate the content of hydroxypropoxy groups (in mg) in the sample using the formula: 75.0 x [N1 (Va-Vm) – k N2 (Ya – Ym)] where N1 is the exact normality of the 0.02 N sodium hydroxide solution; N2 is the exact normality of the 0.02 N sodium thiosulfate solution; and k is VbN1/YbN2 Chart for converting percentage of substitution, by weight, of hydroxypropoxy groups to molecular substitution per glucose unit. Determination of the content of methoxy groups Volume 4, under ASSAY METHODS, Cellulose Derivatives Assay, Ethoxyl and Methoxyl Group Determination . See Apparatus and Procedure in Ethoxy and Methoxy Group Determination and determine the content of methoxy groups (-OCH3). Calculation Calculate as percentage. Correct the % of methoxy groups thus determined by the formula: A - (B x 0.93 x 31 / 75) where A is the total % of -OCH3 groups determined; B is the % of -OCH2CHOHCH3 determined in the Method of Assay for hydroxypropoxy group content; and 0.93 is an average obtained by determining, on a large number of samples, the propylene produced from the reaction of hydriodic acid with hydroxypropoxy groups during the Method of Assay for methoxy groups (-OCH3).
Identification
- Solubility (Vol. 4)
- Swells in water, producing a clear to opalescent, viscous colloidal solution; insoluble in ethanol
- Foam formation
- A 0.1% solution of the sample is shaken vigorously. A layer of foam appears. This test permits the distinction of sodium carboxymethyl cellulose from other cellulose ethers.
- Precipitate formation
- To 5 ml of a 0.5% solution of the sample, add 5 ml of a 5% solution of copper sulfate or of aluminium sulfate. No precipitate appears. This test permits the distinction of sodium carboxymethyl cellulose from other cellulose ethers.
- Substituents
- See description under METHOD OF ASSAY
Purity criteria
- Loss on drying (Vol. 4)
- Not more than 10.0% (105° to constant weight)
- pH (Vol. 4)
- Not less than 5.0 and not more than 8.0 (1 in 100 solution)
- Sulfated ash (Vol. 4)
- Not more than 1.5% for products with viscosities of 50 centipoise or above, and not more than 3% for products with viscosities below 50 centipoise Test 1 g of the sample
- Lead (Vol. 4)
- Not more than 2 mg/kg Determine using an AAS/ICP-AES technique appropriate to the specified level. The selection of sample size and method of sample preparation may be based on the principles of the methods described in Volume 4 (under “General Methods, Metallic Impurities”).
- Propylene chlorohydrins
- Not more than 1 mg/kg See description under TESTS
- Test: Propylene chlorohydrins
- Determine by Gas Chromatography–Mass Spectrometry (GC-MS) (Vol. 4) using the following procedure. Note : Propylene chlorohydrins (PCH) are present as 2 isomers namely: 1-chloro-2-propanol (1C2P) and 2-chloro-1-propanol (2C1P). Internal standard solutions Internal Standard Stock Solution #1 (1 mg/ml): Weigh 0.1 g to nearest 0.1 mg (approximately 100 μ l) of o-xylene-d10 (CAS 56004-61-6) into a 100 ml volumetric flask and make up to volume with methanol. Internal Standard Stock Solution #2 (100 μg/ml): Pipette 5ml of Internal Standard Stock Solution #1 into a 50 ml volumetric flask and make up to volume with methanol. Internal Standard Stock Solution #3 (4 μg/ml): Pipette 1 ml of Internal Standard Stock Solution #2 into a 25 ml volumetric flask and make up to volume with methanol: Internal Standard Solution #4 (16 ng/ml): Add 1 ml of Internal Standard Stock Solution #3 into a 250 ml volumetric flask and dilute to volume with diethyl ether. Internal Standard Solution #5 (8 ng/ml): Pipette 25 ml of Internal Standard Stock Solution #4 into a 50 ml volumetric flask and dilute to volume with diethyl ether. Standards Stock Standard Solution #1 (1mg/ml): Weigh 0.1 g to the nearest 0.1 mg of propylene chlorohydrin, mixture of 1-Chloro-2-propanol-75% and 2-Chloro-1-propanol-25%, Eastman Kodak, Cat. # P1325 or equivalent) into a 100 ml volumetric flask and make up to volume with diethyl ether. Stock Standard Solution #2 (100 μg/ml): Pipette 5 ml of Standard Stock Solution #1 into a 50 ml volumetric flask and make up to volume with diethyl ether. Stock Standard Solution #3 (10 μg/ml): Pipette 5 ml of Standard Stock Solution #2 into a 50 ml volumetric flask and make up to volume with diethyl ether. Stock Standard Solution #4 (500 ng/ml): Pipette 5 ml of Standard Stock Solution #3 into a 100 ml volumetric flask and make up to volume with diethyl ether. Note: All standard solutions should be prepared with diethyl ether of the highest purity available. Prepare working standard solutions by pipetting the volumes shown in the table below in to a 10 ml volumetric flask and make up to volume with diethyl ether. Vol. of Stock Vol. of Internal Vol. Conc. of Conc. of Standard standard made Standard Internal Solution #4, ml solution #4, ml up, ml (ng/ml) Standard (ng/ml) 0.50 5.0 10.0 25 8 1.0 5.0 10.0 50 8 2.0 5.0 10.0 100 8 4.0 5.0 10.0 200 8 5.0 5.0 10.0 300 8 Instrument: A gas chromatograph with a mass selective detector (GCMS) in Selective Ion Monitoring (SIM) mode, Electron impact ionisation (EI) source, pulsed-splitless injector and a data station. GCMS Conditions: Inlet temperature 225° Pulse pressure 50 psi until 2 min Inlet purge flow 40 ml/min at 2 min Injection volume 5 μl Guard Column Deactivated fused silica, 10 m x 0.25 mm i.d. x 0.35 mm o.d. Column 30 m x 0.25 mm i.d. x 1.4 μ m film DB-624 or equivalent Temperature Initial temperature 40° programming: Initial hold Time 5.0 min Ramp rate 10°/min Temperature 2 80° Hold time 3.0 min Ramp rate 25°/min Final temperature 230° Final hold time 5.0 min Carrier Gas Helium Flow rate 1.4 ml/min Column head pressure 11.5 psi Detector Ion source temperature. 230° Transfer line temperature 260° SIM ions: o-Xylene-d10 Target ion m/z = 116 Qualifier ion m/z = 98 1-Chloro-2-Propanol Target ion m/z = 79 Qualifier ion m/z = 81 2-Chloro-1-Propanol Target ion m/z= 58 Qualifier ion m/z= 31 Retention o-Xylene-d10 13.7 min times 1-Chloro-2-Propanol 9.5 min 2-Chloro-1-Propanol 10.4 min Procedure: Weigh about 1.00 g, to nearest 0.1 mg, of sample into a glass vial. Pipette 5.0 ml of Internal Standard Solution #5 into the vial, securely close the vial and sonicate for 10 minutes. Centrifuge the vial to separate the mixture. Remove a portion of the diethyl ether layer for GCMS analysis. Calculations: Calculate the ratios of detector responses for 1C2P and 2C1P versus detector response for o-xylene-d10 at each working standard concentration using the following equation: AR(std) = R(std)/R(IS) where AR(std) is the ratio of detector response for 1C2P or 2C1P versus the detector response for o-xylene-d10 in the standard; R(std) is the detector response of the target ion for 1C2P or 2C1P in the standard; and R(IS) is the detector response of the target ion for o-xylene-d10 in the standard. Prepare standard curves for 1C2P and 2C1P by plotting the concentration of 1C2P or 2C1P (ng/ml) versus the ratios of detector response (AR(std)) for each isomer in the working standards Calculate the ratio of detector response for 1C2P and 2C1P versus the detector response for o-xylene-d10 in the sample using the following equation: AR(sample) = R(Sample)/R(IS) where AR(sample) is the ratio of detector response for 1C2P or 2C1P versus the detector response for o-xylene-d10 in the sample; R(sample) is the detector response of the target ion for 1C2P or 2C1P in the sample; and R(IS) is the detector response of the target ion for o-xylene-d10 in the sample. From the linear regression of the standard curves for each isomer, calculate ng/g using the following equation: ng/g = (V x (AR(sample) -b)/m)/W where AR(sample) is the Ratio of detector response for 1C2P or 2C1P versus the detector response for o-xylene-d10 in the sample; b is the y-intercept of the linear regression curve; m is the slope of the linear regression curve; V is the final volume (5.0 ml); and W is the weight of the sample in grams. Report the PCH content in mg/kg as the sum of the 2 isomers (1C2P and 2C1P).
Authorised in other additives, enzymes, flavourings and nutrients
These authorisations are not for use in food. They let this substance be used inside another additive, a food enzyme, a flavouring or a nutrient preparation — often as a carrier — and it reaches food only as part of that product. Annex III to Regulation (EC) No 1333/2008.
| Part | May be used in | Maximum level | Citation |
|---|---|---|---|
| Annex III, Part 1: Carriers in food additives | All food additives | quantum satis | Regulation (EC) No 1333/2008, Annex III, Part 1 |
| Annex III, Part 2: Food additives other than carriers in food additives | All food additive preparationsAuthorised as a member of Table 1 of Part 6, listed as "Table 1" Note (1): Except enzymes authorised as food additives. | quantum satis | Regulation (EC) No 1333/2008, Annex III, Part 2, via Table 1 of Part 6 |
| Annex III, Part 3: Food additives including carriers in food enzymes | Food enzymesCan be used as a carrier: Yes Note (1): Including enzymes authorised as food additives. | In enzyme preparation: quantum satis In final food except beverages: quantum satis In beverages: quantum satis | Regulation (EC) No 1333/2008, Annex III, Part 3 |
| Annex III, Part 4: Food additives including carriers in food flavourings | All flavouringsAuthorised as a member of Table 1 of Part 6, listed as "Table 1" | quantum satis | Regulation (EC) No 1333/2008, Annex III, Part 4, via Table 1 of Part 6 |
| Annex III, Part 5, Section A: Food additives added in nutrients except in nutrients intended to be used in foodstuffs listed in Part E, point 01.10, of Annex II and foodstuffs for infants and young children listed in Part E, point 13.1, of Annex II | All nutrientsCan be used as a carrier: Yes | quantum satis | Regulation (EC) No 1333/2008, Annex III, Part 5, Section A |
Every name it appears under
31 recorded names. A label may use any of them.
E number
- E464
INS number
- 464
CAS registry number
- 9004-65-3
As it appears in regulation
- Hydroxypropyl methyl cellulose
- Hydroxypropyl methylcellulose
Other names
- E 464
- Hydroxypropyl methyl cellulose
Systematic names
- (2R,3R,4S,5R,6R)-2,3,4-trimethoxy-6-(methoxymethyl)-5-[(2S,3R,4S,5R,6R)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxyoxane;1-[[(2R,3R,4S,5R,6S)-3,4,5-tris(2-hydroxypropoxy)-6-[(2R,3R,4S,5R,6R)-4,5,6-tris(2-hydroxypropoxy)-2-(2-hydroxypropoxymethyl)oxan-3-yl]oxyoxan-2-yl]methoxy]propan-2-ol
Hazard reference values
| Type | Value | Population | Assessed by | Opinion |
|---|---|---|---|---|
| ADI | not specified | — | JECFA | 2011 |
Evidence and how bodies read it
What assessing bodies concluded
Each conclusion is paraphrased in the body's own framing, from the published opinion linked beneath it. Where bodies differ, both stand; this site does not adjudicate between them or add a view of its own.
EFSA 2018
The ANS Panel concluded, using read-across between the celluloses, that there was no genotoxic or carcinogenic concern for unmodified and modified celluloses (E 460–E 469), that no numerical ADI is needed, and that there would be no safety concern at the reported uses and use levels.
Common questions
Assembled from what is above, in the words the questions are usually asked in. Each answer is the same statement the relevant section makes, with the same citations behind it.
- What is E 464?
- E 464 is Hydroxypropyl methylcellulose. Hydroxypropyl methylcellulose, or HPMC, is a thickener and film former used in gluten-free baking, sauces and as the material of vegetarian capsule shells.
- What is Hydroxypropyl methylcellulose used for in food?
- It is listed as an emulsifier, a thickener and a stabiliser — the role Canada, Codex and the US assign it. This page shows every function each regulator records, with the citation for each.
- Where is Hydroxypropyl methylcellulose permitted?
- Of the seven regulators this site reads, Australia and New Zealand, Canada, the EU, Great Britain, Japan, South Korea, the US and the Codex standard permit it. Each permission is for named foods at named levels, not a blanket one; the table on this page gives them with citations.
- Is Hydroxypropyl methylcellulose vegan?
- Yes. Hydroxypropyl methylcellulose is not derived from animals, and is suitable for vegetarians. This page says what it is made from and how.
Sources for this page
- anz retrieved 2026-10-17
- ca retrieved 2026-10-17
- eu retrieved 2026-10-18
- gb retrieved 2026-10-18
- jp retrieved 2026-10-18
- kr retrieved 2026-10-18
- ecfr retrieved 2026-10-17
- gsfa retrieved 2026-09-07
- euspecs retrieved 2026-10-18
- jecfaspecs retrieved 2026-09-23
Full licence terms and publisher details on Sources. How this page is built and updated: Method.
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