Calcium chloride
10043-52-4 · 856 - Pickles · Bovikalc · CaCl · CaCl2 · Cacl2 (anhydrous) · CaCl2 Solution · CaCl2.xH2O · Cal Plus · Calcarea muriatica · Calcium chloride · Calcium chloride (CaCl2) · CALCIUM CHLORIDE 10% · Calcium chloride 10% in plastic container · Calcium chloride anhydrous · Calcium Chloride anhydrous prills · Calcium chloride anhydrous, powder · Calcium chloride solution, 0.5 M in water · Calcium chloride ultra dry · CALCIUM CHLORIDE, ACS · Calcium chloride, anhydrous, dessicant, ACS grade, granular · Calcium chloride, Prilled · Calcium Choride · Calcium dichloride · Calcium Dichloride Hydrate · Calcium(2+) chloride · Calcium(II) chloride · calcium(II) chloride hydrate · Calcium-45 chloride · Calcosan · Calplus · Caltac · chlorocalcium · chlorocalcium hydrate · Dowflake · E 509 · INS NO.509 · INS-509 · Intergravin-orales · Kalgan · Liquidow · MultiBic component calcium chloride dihydrate · Peladow · Reagecon Calcium Chloride 75 g/L in Water TS Solution according to Japanese Pharmacopoeia (JP) · Snomelt · Superflake anhydrous · Uramine MC · E509 · 509 · calcium;dichloride · Calcium chloride · Calcium chloride · Calciumchlorid · Calciumchloride · Chlorek wapnia · Chlorid vápenatý · Chlorure de calcium · Cloreto de cálcio · Cloruro cálcico · Cloruro di calcio · Clorură de calciu · Kalcija hlorīds · Kalcijev klorid · Kalcio chloridas · Kalcium-klorid · Kalciumklorid · Kalsiumkloridi · Kaltsiumkloriid · Klorur tal-kalċju · Χλωριούχο ασβέστιο · Калциев хлоридE number E509INS 509CAS 10043-52-4
Listed as a firming agent by Canada, Codex and the US.
Listed as firming agents (CA, US, Codex) · thickeners (US, Codex) · acidity regulators (CA, US) · stabilisers (US, Codex) · preservatives (US) · flavour enhancers (US) · humectants (US) · anticaking agents (US) · curing and pickling agents (US) · nutrient supplements (US) · enzymes (US) · texturisers (US) · surface-active agents (US) · synergists (US) · yeast foods (CA) · processing aids (US)
- Canada: Firming agent — Health Canada, List of Permitted Firming Agents (List 6)
- United States: Firming agent — FDA, Substances Added to Food: CALCIUM CHLORIDE
- United States: Firming agents — 21 CFR 184.1193, citing 21 CFR 170.3(o)(10)
- Codex Alimentarius: Firming agent — CXS 192-1995 Table One, INS 509
- United States: Stabilizers and thickeners — 21 CFR 184.1193, citing 21 CFR 170.3(o)(28)
- Codex Alimentarius: Thickener — CXS 192-1995 Table One, INS 509
- Canada: Acidity regulator — Health Canada, List of Permitted Acidity Regulators and Acid-Reacting Materials (List 10)
- United States: pH control agent — FDA, Substances Added to Food: CALCIUM CHLORIDE
- United States: pH control agents — 21 CFR 184.1193, citing 21 CFR 170.3(o)(23)
- United States: Stabilizers and thickeners — 21 CFR 184.1193, citing 21 CFR 170.3(o)(28)
- Codex Alimentarius: Stabilizer — CXS 192-1995 Table One, INS 509
- United States: Antimicrobial agents — 21 CFR 184.1193, citing 21 CFR 170.3(o)(2)
- United States: Flavor enhancers — 21 CFR 184.1193, citing 21 CFR 170.3(o)(11)
- United States: Humectant — FDA, Substances Added to Food: CALCIUM CHLORIDE
- United States: Humectants — 21 CFR 184.1193, citing 21 CFR 170.3(o)(16)
- United States: Anticaking agent or free-flow agent — FDA, Substances Added to Food: CALCIUM CHLORIDE
- United States: Anticaking agents and free-flow agents — 21 CFR 184.1193, citing 21 CFR 170.3(o)(1)
- United States: Curing and pickling agents — 21 CFR 184.1193, citing 21 CFR 170.3(o)(5)
- United States: Nutrient supplements — 21 CFR 184.1193, citing 21 CFR 170.3(o)(20)
- United States: Enzyme — FDA, Substances Added to Food: CALCIUM CHLORIDE
- United States: Texturizers — 21 CFR 184.1193, citing 21 CFR 170.3(o)(32)
- United States: Surface-active agents — 21 CFR 184.1193, citing 21 CFR 170.3(o)(29)
- United States: Synergists — 21 CFR 184.1193, citing 21 CFR 170.3(o)(31)
- Canada: Yeast food — Health Canada, List of Permitted Yeast Foods (List 14)
- United States: Processing aids — 21 CFR 184.1193, citing 21 CFR 170.3(o)(24)

Calcium chloride is a firming agent used in canned vegetables and pickles to keep them crisp, in cheesemaking to help milk set, and in brewing to adjust water chemistry.
Where it is and isn’t permitted
| Jurisdiction | Status | Scope and limits | Citation |
|---|---|---|---|
| Australia and New Zealand | Permitted, with conditions | 55 food categories highest permitted level 750 mg/kg Show every food category
| Food Standards Code, Schedule 15, S15—5and 54 further provisionsretrieved 2026-10-17 |
| Canada | Permitted, with conditions | highest permitted level 4,000 mg/kg 17 permitted uses Show every permitted use
| Health Canadaand 16 further provisionsretrieved 2026-10-17 |
| European Union | Permitted, with conditions | 76 food categories Show every food category
| Regulation (EC) No 1333/2008and 75 further provisionsretrieved 2026-10-18 |
| Great Britain | Permitted, with conditions | 73 food categories Show every food category
| Assimilated Regulation (EC) No 1333/2008and 72 further provisionsretrieved 2026-10-18 |
| Japan | Permitted, with conditions | Designated additive: Appended Table 1, item 87, 塩化カルシウム (“Calcium Chloride” in the unofficial English translation). …Designated additive: Appended Table 1, item 87, 塩化カルシウム (“Calcium Chloride” 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), entry 塩化カルシウム: (1) [may be used only in the circumstances stated] “塩化カルシウムは、食品の製造又は加工上必要不可欠な場合及び栄養の目的で使用する場合以外は食品に使用してはならない。” (2) [sets maximum levels of use for the foods stated; states an exception to the preceding sentence] “塩化カルシウムの使用量は、カルシウムとして、食品の1.0%以下でなければならない。ただし、特別用途表示の許可又は承認を受けた場合は、この限りでない。” The Japanese is the standard as published. There is no official English translation of the Notification; 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 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), 염화칼슘 (“Calcium Chloride”, the English the Code prints beside it); the Code marks it as also usable as a nutrient fortifier; 3. 영양강화제 (nutrient fortifiers), 염화칼슘; nutrient: 칼슘(Ca); the Code marks it as also usable as a general food additive. Main use (주용도) of 염화칼슘: 응고제. Standard for use (사용기준) of 염화칼슘: (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 | 21 CFR 184.1193retrieved 2026-10-17 | |
| Codex Alimentarius | Permitted, with conditions | 15 food categories no numerical limit (good manufacturing practice) Show every food category and its notes
| CXS 192-1995 Table Three, INS 509and 15 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 | 750 mg/kg | 1 numeric limit, 54 GMP |
|---|---|---|
| Canada | 220 mg/kg – 4,000 mg/kg | 6 numeric limit, 9 GMP, 2 no quantity stated |
| European Union | — | 46 several limits, 8 quantum satis, 22 no quantity stated |
| Great Britain | — | 73 quantum satis |
| Japan | — | 1 no quantity stated |
| South Korea | — | 1 no quantity stated |
| United States | — | 1 no quantity stated |
| Codex Alimentarius | — | 16 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. 785 · Calcium chloride · Wonderful Citrus, LLC
Intended use: Intended for use as an anti-browning agent in processed fruits and vegetables
FDA’s response (2018-11-20): FDA has no questions
GRN No. 634 · Calcium chloride · PepsiCo, Inc.
Intended use: For use in the manufacturing of potato snacks to reduce the formation of acrylamide at use levels of 1 percent or less.
FDA’s response (2016-08-08): FDA has no questions
What it is made from
Obtained as a by-product of the Solvay soda process or from natural brines.
- Vegan
- Vegetarian
Compare other additives on the dietary indexes.
- CAS registry number
- 10043-52-4
- InChIKey
- UXVMQQNJUSDDNG-UHFFFAOYSA-L
- PubChem
- CID 5284359
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 93 % | no less than 93 % |
| Lead | no more than 2 mg/kg | no more than 2 mg/kg |
| Arsenic | no more than 3 mg/kg | — |
| Mercury | no more than 1 mg/kg | — |
The two documents state the same figures for every parameter compared here.
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 509 Calcium chloride
Assay, identification and purity criteria
Description and assay
- Einecs
- 233-140-8
- Chemical name
- Calcium chloride
- Chemical formula
- CaCl₂ · nH₂O (n = 0,2 or 6)
- Molecular weight
- 110,99 (anhydrous), 147,02 (dihydrate), 219,08 (hexahydrate)
- Assay
- Content not less than 93,0 % on the anhydrous basis
- Description
- White, odourless, hygroscopic powder or deliquescent crystals
Identification
- Test for calcium
- Passes test
- Test for chloride
- Passes test
- Solubility
- Soluble in water and in ethanol
Purity criteria
- Magnesium and alkali salts
- Not more than 5 % on the dried basis (calculated as sulphates)
- Fluoride
- Not more than 40 mg/kg
- Arsenic
- Not more than 3 mg/kg
- Lead
- Not more than 2 mg/kg
- Mercury
- Not more than 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 509 Calcium Chloride
Synonyms: INS No. 509
Assay, identification and purity criteria
Description and assay
- Specification history
- Prepared at the 19th JECFA (1975), published in NMRS 55B (1976) and in FNP 52 (1992). Metals and arsenic specifications revised at the 63rd JECFA (2004). An ADI 'not limited' was established at the 17th JECFA (1973)
- Chemical names
- Calcium chloride
- C.A.S. number
- 10043-52-4
- Chemical formula
- Anhydrous: CaCl 2 Dihydrate: CaCl 2 · 2H 2 O Hexahydrate: CaCl 2 · 6H 2 O
- Formula weight
- Anhydrous: 110.99 Dihydrate: 147.02 Hexahydrate: 219.08
- Assay
- Anhydrous: Not less than 93% Dihydrate: Not less than 99.0% and not more than the equivalent of 107.0% of CaCl 2 · 2H 2 O Hexahydrate: Not less than 98.0% and not more than the equivalent of 110% of CaCl 2 · 6H 2 O
- DESCRIPTION
- Anhydrous: White, deliquescent lumps or porous masses Dihydrate: White, hard, deliquescent fragments or granules Hexahydrate: Colourless, very deliquescent crystals
- FUNCTIONAL USES
- Firming agent
- METHOD OF ASSAY
- Weigh accurately about 1 g of anhydrous calcium chloride, or the corresponding weight of a hydrate, transfer to a 250-ml beaker, and dissolve in a mixture of 100 ml of water and 5 ml of dilute hydrochloric acid TS. Transfer the solution to a 250-ml volumetric flask, dilute with water to volume and mix. Pipet 50 ml of the solution into a suitable container, add 100 ml of water, 15 ml of sodium hydroxide TS, 40 mg of murexide indicator (amm. purpurate) and 3 ml of naphthol green TS, and titrate with 0.05 M disodium ethylenediaminetetra-acetate until the solution is deep blue in colour. Each ml of 0.05 M disodium ethylenediaminetetraacetate is equivalent to 5.55 mg of CaCl 2 ; 7.35 mg of CaCl 2 · 2H 2 O; or 10.95 mg of CaCl 2 · 6H 2 O.
Identification
- Solubility (Vol. 4)
- Anhydrous: Freely soluble in water and ethanol Dihydrate: Freely soluble in water; soluble in ethanol Hexahydrate: Very soluble in water and ethanol
- Test for chloride (Vol. 4)
- Passes test
- Test for calcium (Vol. 4)
- Passes test
Purity criteria
- Free alkali
- Not more than 0.15% as Ca(OH) 2 Dissolve 1 g of the sample in 20 ml of freshly boiled and cooled water, and add 2 drops of phenolphthalein TS. If the solution is pink, the pink colour is discharged by adding 2 ml of 0.02 N hydrochloric acid.
- Magnesium and alkali salts
- Not more than 5% Dissolve 1 g of anhydrous calcium chloride, or the corresponding weight of a hydrate, in about 50 ml of water, add 500 mg of ammonium chloride, mix and boil for about 1 min. Quickly add 40 ml of oxalic acid TS, and stir vigorously until precipitation is well established. Immediately add 2 drops of methyl red TS, then add ammonia TS dropwise until the mixture is just alkaline, and cool. Transfer the mixture into a 100-ml cylinder, dilute with water to 100 ml, let stand for 4 h or overnight, and then decant the clear, supernatant liquid through a dry filter paper. To 50 ml of the clear filtrate in a platinum dish add 0.5 ml of sulfuric acid and evaporate the mixture on a steam bath to a small volume. Carefully evaporate the remaining liquid to dryness over a free flame, and continue heating until the ammonium salts have been completely decomposed and volatilized. Finally, ignite the residue to constant weight. The weight of the residue does not exceed 25 mg.
- Fluoride (Vol. 4)
- Not more than 40 mg/kg (Method III)
- Lead (Vol. 4)
- Not more than 2 mg/kg Determine using an atomic absorption technique appropriate to the specified level. The selection of sample size and method of sample preparation may be based on the principles of the method described in Volume 4, “Instrumental Methods.”
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 nutrients | quantum satis | Regulation (EC) No 1333/2008, Annex III, Part 5, Section A |
Every name it appears under
71 recorded names. A label may use any of them.
E number
- E509
INS number
- 509
CAS registry number
- 10043-52-4
As it appears in regulation
- Calcium chloride
Other names
- 856 - Pickles
- Bovikalc
- CaCl
- CaCl2
- Cacl2 (anhydrous)
- CaCl2 Solution
- CaCl2.xH2O
- Cal Plus
- Calcarea muriatica
- Calcium chloride
- Calcium chloride (CaCl2)
- CALCIUM CHLORIDE 10%
- Calcium chloride 10% in plastic container
- Calcium chloride anhydrous
- Calcium Chloride anhydrous prills
- Calcium chloride anhydrous, powder
- Calcium chloride solution, 0.5 M in water
- Calcium chloride ultra dry
- CALCIUM CHLORIDE, ACS
- Calcium chloride, anhydrous, dessicant, ACS grade, granular
- Calcium chloride, Prilled
- Calcium Choride
- Calcium dichloride
- Calcium Dichloride Hydrate
- Calcium(2+) chloride
- Calcium(II) chloride
- calcium(II) chloride hydrate
- Calcium-45 chloride
- Calcosan
- Calplus
- Caltac
- chlorocalcium
- chlorocalcium hydrate
- Dowflake
- E 509
- INS NO.509
- INS-509
- Intergravin-orales
- Kalgan
- Liquidow
- MultiBic component calcium chloride dihydrate
- Peladow
- Reagecon Calcium Chloride 75 g/L in Water TS Solution according to Japanese Pharmacopoeia (JP)
- Snomelt
- Superflake anhydrous
- Uramine MC
Systematic names
- calcium;dichloride
Hazard reference values
| Type | Value | Population | Assessed by | Opinion |
|---|---|---|---|---|
| ADI | not limited | — | JECFA | 1973 |
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 2019
The FAF Panel found no concern for genotoxicity or carcinogenicity for hydrochloric acid and its potassium, calcium and magnesium salts (E 507–E 509, E 511), and used a human reference value of 40 mg chloride/kg bw/day. Although high-percentile exposure in toddlers, children and adolescents was slightly above that value, it concluded that exposure to chloride from these additives does not raise a safety concern at reported uses.
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 509?
- E 509 is Calcium chloride. Calcium chloride is a firming agent used in canned vegetables and pickles to keep them crisp, in cheesemaking to help milk set, and in brewing to adjust water chemistry.
- What is Calcium chloride used for in food?
- It is listed as a firming agent — the role Canada, Codex and the US assign it. This page shows every function each regulator records, with the citation for each.
- Where is Calcium chloride 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 Calcium chloride vegan?
- Yes. Calcium chloride 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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