Sodium ascorbate
134-03-2 · 912284-14-1 · (+)-Sodium L-ascorbate · (+)-Sodium L-ascorbate;Vitamin C sodium salt;Sodium L-ascorbate · (5R)-5-[(1S)-1,2-dihydroxyethyl]-3-hydroxy-4-(sodiooxy)-2,5-dihydrofuran-2-one · (S)-5-((R)-1,2-Dihydroxyethyl)-3,4-dihydroxyfuran-2(5H)-one monosodium salt · 3-Oxo-L-gulofuranolactone sodium · Aminofenitrooxon · Ascorbate de sodium · Ascorbato de sodio · Ascorbato sodico · Ascorbic acid sodium derivative · Ascorbic acid sodium salt · Ascorbic acid sodium salt (Vitamin C sodium salt) · Ascorbicin · Ascorbin · C6H7NaO6 · CAS-134-03-2 · CCRIS 3291 · Cebitate · Cevalin · E 301 · HBL 508 · HSDB 694 · INS NO.301 · INS-301 · Iskia-C · L(+)-Ascorbic acid sodium salt · L(+)Ascorbic acid sodium salt · l-Ascorbate, sodium · L-Ascorbic acid (sodium salt) (Standard) · L-Ascorbic acid monosodium salt · L-Ascorbic acid sodium · L-Ascorbic acid sodium salt · L-Ascorbic acid, sodium salt (1:1) · Monosodium Ascorbate · Monosodium L-ascorbate · Natri-C · Natrii ascorbas · Sodascorbate · sodium (2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate · sodium (L)-ascorbate · Sodium (R)-2-((S)-1,2-dihydroxyethyl)-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate · Sodium ascorbate · Sodium ascorbate CRS · Sodium derivative of 3-oxo-L-gulofuranolactone · Sodium L-ascorbate · sodium L-ascorbate salt · sodium;(2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2H-furan-3-olate · sodiumascorbate · VITA-JEC C · Vitamin C sodium · Vitamin C, sodium salt · E301 · 301 · Sodium ascorbate; Sodium (2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate · Sodium;(2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2H-furan-3-olate · Sodium ascorbate · Ascorbat de sodiu · Ascorbate de sodium · Ascorbato de sódio · Ascorbato di sodio · Ascorbato sódico · Askorban sodný · ASKORBAT TAS-SODJU · Askorbinian sodu · Assorbat tas-sodju · Naatriumaskorbaat · Natrijev askorbat · Natrio askorbatas · Natriumascorbaat · Natriumascorbat · Natriumaskorbaatti · Natriumaskorbat · Nátrium-aszkorbát · Nātrija askorbāts · Sodium ascorbate · Ασκορβικό νάτριο · Натриев аскорбатE number E301INS 301CAS 134-03-2
Listed as an antioxidant and a flour treatment agent by Codex and the US.
Listed as antioxidants (US, Codex) · flour treatment agents (US, Codex) · colours (US) · preservatives (CA) · raising agents (US) · glazing and surface-finishing agents (US) · dough strengtheners (US) · nutrient supplements (US) · oxidising and reducing agents (US) · processing aids (US)
- United States: Antioxidant — FDA, Substances Added to Food: SODIUM ASCORBATE
- Codex Alimentarius: Antioxidant — CXS 192-1995 Table One, INS 301
- United States: Flour treating agent — FDA, Substances Added to Food: SODIUM ASCORBATE
- Codex Alimentarius: Flour treatment agent — CXS 192-1995 Table One, INS 301
- United States: Color or coloring adjunct — FDA, Substances Added to Food: SODIUM ASCORBATE
- Canada: Preservative — Health Canada, List of Permitted Preservatives (List 11)
- United States: Leavening agent — FDA, Substances Added to Food: SODIUM ASCORBATE
- United States: Surface-finishing agent — FDA, Substances Added to Food: SODIUM ASCORBATE
- United States: Dough strengthener — FDA, Substances Added to Food: SODIUM ASCORBATE
- United States: Nutrient supplement — FDA, Substances Added to Food: SODIUM ASCORBATE
- United States: Oxidizing or reducing agent — FDA, Substances Added to Food: SODIUM ASCORBATE
- United States: Processing aid — FDA, Substances Added to Food: SODIUM ASCORBATE

Sodium ascorbate is the sodium salt of vitamin C, used as an antioxidant and, in cured meats, as a cure accelerator that speeds colour development and reduces nitrosamine formation.
Where it is and isn’t permitted
| Jurisdiction | Status | Scope and limits | Citation |
|---|---|---|---|
| Australia and New Zealand | Permitted, with conditions | 62 food categories highest permitted level 500 mg/kg Show every food category
| Food Standards Code, Schedule 15, S15—5and 61 further provisionsretrieved 2026-10-17 |
| Canada | Permitted, with conditions | highest permitted level 550 mg/kg 7 permitted uses Show every permitted use
| Health Canada, List of Permitted Preservatives (List 11)and 6 further provisionsretrieved 2026-10-17 |
| European Union | Permitted, with conditions | 85 food categories highest permitted level 300 mg/l Show every food category
| Regulation (EC) No 1333/2008, Annex IIand 84 further provisionsretrieved 2026-10-18 |
| Great Britain | Permitted, with conditions | 81 food categories Show every food category
| Assimilated Regulation (EC) No 1333/2008and 80 further provisionsretrieved 2026-10-18 |
| Japan | Permitted, with conditions | Designated additive: Appended Table 1, item 11, L―アスコルビン酸ナトリウム(別名ビタミンCナトリウム) (“Sodium L-Ascorbate (Vitamin C Sodium)” in the unofficial English translation). …Designated additive: Appended Table 1, item 11, L―アスコルビン酸ナトリウム(別名ビタミンCナトリウム) (“Sodium L-Ascorbate (Vitamin C Sodium)” 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), L-아스코브산나트륨 (“Sodium L-Ascorbate”, the English the Code prints beside it); the Code marks it as also usable as a nutrient fortifier; 3. 영양강화제 (nutrient fortifiers), L-아스코브산나트륨; nutrient: 비타민C; the Code marks it as also usable as a general food additive. Main use (주용도) of L-아스코브산나트륨: 산화방지제. Standard for use (사용기준) of L-아스코브산나트륨: (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 182.3731retrieved 2026-10-17 | |
| Codex Alimentarius | Permitted, with conditions | 21 food categories highest permitted level 500 mg/kg Show every food category and its notes
| CXS 192-1995 Table Three, INS 301and 21 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 | 50 mg/kg – 500 mg/kg | 5 numeric limit, 57 GMP |
|---|---|---|
| Canada | 400 mg/kg – 550 mg/kg | 2 numeric limit, 4 GMP, 1 no quantity stated |
| European Union | 75 mg/kg – 300 mg/kg | 4 numeric limit, 46 several limits, 13 quantum satis, 22 no quantity stated |
| Great Britain | — | 1 several limits, 80 quantum satis |
| Japan | — | 1 no quantity stated |
| South Korea | — | 1 no quantity stated |
| United States | — | 1 no quantity stated |
| Codex Alimentarius | 50 mg/kg – 500 mg/kg | 6 numeric limit, 16 GMP |
What it is made from
Made by neutralising ascorbic acid, produced by fermentation from maize glucose, with a sodium base.
- Vegan
- Vegetarian
Compare other additives on the dietary indexes.
- CAS registry number
- 134-03-2
- InChIKey
- PPASLZSBLFJQEF-RXSVEWSESA-M
- PubChem
- CID 23667548
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 99 % | stated in prose |
| Loss on drying | no more than 0.25 % | no more than 0.25 % |
| 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 301 Sodium ascorbate
Synonyms: Sodium L-ascorbate; L-Ascorbic acid monosodium salt
Assay, identification and purity criteria
Description and assay
- Einecs
- 205-126-1
- Chemical name
- Sodium ascorbate; Sodium L-ascorbate; 2,3-Didehydro-L-threo-hexono-1,4-lactone sodium enolate; 3-Keto-L-gulofurano-lactone sodium enolate
- Chemical formula
- C₆H₇O₆Na
- Molecular weight
- 198,11
- Assay
- Sodium ascorbate, after drying in a vacuum desiccator over sulphuric acid for 24 hours, contains not less than 99 % of C₆H₇O₆Na
- Description
- White or almost white, odourless crystalline powder which darkens on exposure to light
Identification
- Test for ascorbate
- Passes test
- Test for sodium
- Passes test
- pH
- Between 6,5 and 8,0 (10 % aqueous solution)
- Specific rotation
- [α]D ²⁰ between + 103° and + 106° (10 % w/v aqueous solution)
Purity criteria
- Loss on drying
- Not more than 0,25 % (in vacuum over sulphuric acid, 24 hours)
- 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 301 Sodium Ascorbate
Synonyms: INS No. 301
Assay, identification and purity criteria
Description and assay
- Specification history
- Prepared at the 17th JECFA (1973), published in FNP 4 (1978) and in FNP 52 (1992). Metals and arsenic specifications revised at the 61st JECFA (2003). A group ADI ‘not specified’ was established for ascorbic acid and its Ca, K and Na salts at the 25th JECFA (1981).
- Chemical names
- Sodium ascorbate, sodium L-ascorbate, 2,3-didehydro-L-threo-hexono-1,4-lactone sodium enolate; 3-keto-L-gulofurano-lactone sodium enolate
- C.A.S. number
- 134-03-2
- Chemical formula
- C 6 H 7 O 6 Na
- Formula weight
- 198.11
- Assay
- White or almost white, odourless crystalline powder which darkens on exposure to light
- DESCRIPTION
- Not less than 99% after drying
- FUNCTIONAL USES
- Antioxidant
- METHOD OF ASSAY
- Dissolve about 0.400 g of the dried sample in a mixture of 100 ml of carbon dioxide-free water and 25 ml of dilute sulphuric acid TS. Titrate the solution at once with 0.1 N iodine, adding a few drops of starch TS as indicator as the end-point is approached. Each ml of 0.1 N iodine is equivalent to 9.905 mg of C 6 H 7 O 6 Na.
Identification
- Solubility (Vol. 4)
- Freely soluble in water; very slightly soluble in ethanol See description under TESTS
- Test for ascorbate Vol. 4)
- Passes test
- Test for sodium (Vol. 4)
- Passes test Test a solution of previously ignited sample, acidified with dilute acetic acid TS, filtered if necessary
- Reducing reaction
- A solution of the sample will decolourize a solution of 2,6-dichloro-phenolindophenol TS
Purity criteria
- Loss on drying (Vol. 4)
- Not more than 0.25% (vacuum desiccator over sulfuric acid, 24 h)
- pH (Vol. 4)
- 6.5 - 8.0 (1 in 10 soln)
- Specific rotation (Vol. 4)
- [alpha] 25,D: Between +103 o and +108 o (10% (w/v) aqueous solution)
- 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 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 |
| Annex III, Part 5, Section B: Food additives added 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 | Coatings of nutrient preparations containing polyunsaturated fatty acids (food category: Foods for infants and young children, and foods mentioned in Part E, point 01.10, of Annex II) | Total carry-over 75 mg/l | Regulation (EC) No 1333/2008, Annex III, Part 5, Section B |
| Annex III, Part 5, Section B: Food additives added 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 | Microencapsulated vitamin A preparations (food category: Infant formula and follow-on formula as defined by Regulation (EU) No 609/2013) | 50 000 mg/kg in microencapsulated vitamin A preparation and 1 mg/l maximum carry-over in final food | Regulation (EC) No 1333/2008, Annex III, Part 5, Section B |
| Annex III, Part 5, Section B: Food additives added 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 | Vitamin D preparations (food category: Infant formulae and follow-on formulae as defined by Regulation (EU) No 609/2013) | 100 000 mg/kg in vitamin D preparation and 1 mg/l maximum carry-over in final food | Regulation (EC) No 1333/2008, Annex III, Part 5, Section B |
Every name it appears under
79 recorded names. A label may use any of them.
E number
- E301
INS number
- 301
CAS registry number
- 134-03-2
- 912284-14-1
As it appears in regulation
- Sodium ascorbate
Other names
- (+)-Sodium L-ascorbate
- (+)-Sodium L-ascorbate;Vitamin C sodium salt;Sodium L-ascorbate
- (5R)-5-[(1S)-1,2-dihydroxyethyl]-3-hydroxy-4-(sodiooxy)-2,5-dihydrofuran-2-one
- (S)-5-((R)-1,2-Dihydroxyethyl)-3,4-dihydroxyfuran-2(5H)-one monosodium salt
- 3-Oxo-L-gulofuranolactone sodium
- Aminofenitrooxon
- Ascorbate de sodium
- Ascorbato de sodio
- Ascorbato sodico
- Ascorbic acid sodium derivative
- Ascorbic acid sodium salt
- Ascorbic acid sodium salt (Vitamin C sodium salt)
- Ascorbicin
- Ascorbin
- C6H7NaO6
- CAS-134-03-2
- CCRIS 3291
- Cebitate
- Cevalin
- E 301
- HBL 508
- HSDB 694
- INS NO.301
- INS-301
- Iskia-C
- L(+)-Ascorbic acid sodium salt
- L(+)Ascorbic acid sodium salt
- l-Ascorbate, sodium
- L-Ascorbic acid (sodium salt) (Standard)
- L-Ascorbic acid monosodium salt
- L-Ascorbic acid sodium
- L-Ascorbic acid sodium salt
- L-Ascorbic acid, sodium salt (1:1)
- Monosodium Ascorbate
- Monosodium L-ascorbate
- Natri-C
- Natrii ascorbas
- Sodascorbate
- sodium (2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate
- sodium (L)-ascorbate
- Sodium (R)-2-((S)-1,2-dihydroxyethyl)-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate
- Sodium ascorbate
- Sodium ascorbate CRS
- Sodium derivative of 3-oxo-L-gulofuranolactone
- Sodium L-ascorbate
- sodium L-ascorbate salt
- sodium;(2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2H-furan-3-olate
- sodiumascorbate
- VITA-JEC C
- Vitamin C sodium
- Vitamin C, sodium salt
Systematic names
- Sodium ascorbate; Sodium (2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate
- Sodium;(2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2H-furan-3-olate
Hazard reference values
| Type | Value | Population | Assessed by | Opinion |
|---|---|---|---|---|
| ADI | not specified | — | JECFA | 1981 |
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 2015
The ANS Panel found no genotoxicity concern and no adverse effects in long-term or developmental studies for ascorbic acid (E 300), sodium ascorbate (E 301) and calcium ascorbate (E 302). It concluded that there is no safety concern at the reported uses and use levels and no need for a numerical ADI.
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 301?
- E 301 is Sodium ascorbate. Sodium ascorbate is the sodium salt of vitamin C, used as an antioxidant and, in cured meats, as a cure accelerator that speeds colour development and reduces nitrosamine formation.
- What is Sodium ascorbate used for in food?
- It is listed as an antioxidant and a flour treatment agent — the role Codex and the US assign it. This page shows every function each regulator records, with the citation for each.
- Where is Sodium ascorbate 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 Sodium ascorbate vegan?
- Yes. Sodium ascorbate 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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