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Vitamins and nutraceutical actives

Calcium ascorbate

Also known as Ascorbic acid calcium salt, Calcium diascorbate, Calcium ascorbate anhydrous

CAS 5743-27-1Formula C12H14CaO12Molar mass 390.31 g/molEC 227-261-5
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Calcium ascorbate chemical structure, C12H14CaO12, CAS 5743-27-1
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
5743-27-1
Formula
C12H14CaO12
Appearance
White crystalline powder
Solubility
INSOL IN ETHER
HS code
293627
Category
Vitamins and nutraceutical actives
Illustrative photo, off-white powder in an open kraft paper sack in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Calcium ascorbate?

Plain description, key identifiers and synonyms

Calcium ascorbate is a chemical substance with the molecular formula C12H14CaO12 and a molar mass of 390.31 g/mol. Its CAS registry number is 5743-27-1. The IUPAC name is calcium bis((2R)-2-[(1S)-1,2-dihydroxyethyl]-3-hydroxy-5-oxo-2H-furan-4-olate).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
calcium bis((2R)-2-[(1S)-1,2-dihydroxyethyl]-3-hydroxy-5-oxo-2H-furan-4-olate)
CAS number
5743-27-1 CAS number cross-checkedOther or deprecated CAS: 5743-28-2
EC number
227-261-5
Molecular formula
C12H14CaO12
UNII
J96U0ZD4Y6
INCI name
CALCIUM ASCORBATE
InChIKey
BLORRZQTHNGFTI-ZZMNMWMASA-L
InChI
InChI=1S/2C6H8O6.Ca/c2*7-1-2(8)5-3(9)4(10)6(11)12-5;/h2*2,5,7-10H,1H2;/q;;+2/p-2/t2*2-,5+;/m00./s1
Canonical SMILES
O=C1OC(C(O)CO)C(O)=C1[O-].O=C1OC(C(O)CO)C(O)=C1[O-].[Ca+2]
Isomeric SMILES
C([C@@H]([C@@H]1C(=C(C(=O)O1)[O-])O)O)O.C([C@@H]([C@@H]1C(=C(C(=O)O1)[O-])O)O)O.[Ca+2]

Synonyms

  • Ascorbic acid calcium salt
  • Calcium diascorbate
  • Calcium ascorbate anhydrous
  • Hemicalcium ascorbate
  • Calci-C
  • L-Ascorbic acid, calcium salt (2:1)
  • Ester-C
  • Calcium ascorbate (e 302)
  • INS NO.302
  • Vitamin c (as calcium ascorbate)
  • L-Ascorbic acid, calcium salt (2:1), dihydrate
  • Calcium L-ascorbate
  • Ascorbic acid calcium
  • L-Ascorbic acid calcium salt (2:1)
  • (R)-5-((S)-1,2-Dihydroxyethyl)-3,4-dihydroxyfuran-2(5H)-one calcium salt (2:1)
  • Calcium bis{(2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate}
  • calcium, (2R)-2-[(1S)-1,2-dihydroxyethyl]-3-hydroxy-5-oxo-2H-furan-4-olate

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
White crystalline powderexp.
Odour
ODORLESSexp.
Solubility
INSOL IN ETHERexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
390.31 g/molcalc.
Exact mass
390.0111 Dacalc.
LogP (octanol/water)
-5.59calc.
Topological polar surface area
220.1 Ųcalc.
Hydrogen bond donors
6calc.
Hydrogen bond acceptors
12calc.
Rotatable bonds
4calc.
Heavy atoms
25calc.
Rings
2calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.5calc.
Formal charge
0calc.
Stereocentres
4calc.
Components
3calc.
Lipinski rule of five
Fails (2 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=C1C=CCO1

O=C1C=CCO1

1 ring, 6 atoms, the 2(5H)-Furanone ring system.

877 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Calcium ascorbate suppliers

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All 65 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

65 suppliers in 19 countries

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Calcium ascorbate price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Antioxidant for foods, vitamin c source.

Antioxidant/colour fixative (prepared meat, dairy, baby products).

Use classes: Food additives.

Cosmetic ingredient, INCI name CALCIUM ASCORBATE(antioxidant, skin conditioning)

Pharmacological actions

  • Antioxidants
  • Vitamins

Functional uses

  • Antioxidant
  • Softener and conditioner

Cosmetic functions

  • Antioxidant
  • Skin conditioning

How it is made

Prepd from ascorbic acid and calcium carbonate by controlled precipitation in dilute acetone or alcohol: Ruskin, Merrill, Science 105, 504 (1947), Ruskin, US pat 2,596,103 (1952), idem, US pat 2,631,155 (1953 to Physiological Chemicals).

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • Food additive

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Calcium ascorbate is traded under.

HS 2936.27Indicative HS code

Vitamin C and its derivatives

World exports in 2024
$1.02B
+7.5% vs 2023, imports $1.07B
2019 to 2024
Top exporters
  1. China60.4%
  2. United States10.4%
  3. Netherlands9.2%
Top importers
  1. United States18.5%
  2. Netherlands9.9%
  3. Germany7.4%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Calcium ascorbate is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Calcium ascorbate, based on the data on this page

What is Calcium ascorbate?

Calcium ascorbate is a chemical substance with the molecular formula C12H14CaO12 and a molar mass of 390.31 g/mol. Its CAS registry number is 5743-27-1. The IUPAC name is calcium bis((2R)-2-[(1S)-1,2-dihydroxyethyl]-3-hydroxy-5-oxo-2H-furan-4-olate).

What is the CAS number of Calcium ascorbate?

The CAS registry number of Calcium ascorbate is 5743-27-1. Other or deprecated CAS numbers: 5743-28-2.

What is the molecular formula and weight of Calcium ascorbate?

The molecular formula of Calcium ascorbate is C12H14CaO12 and its molar mass is 390.31 g/mol.

What is Calcium ascorbate used for?

Antioxidant for foods, vitamin c source. Antioxidant/colour fixative (prepared meat, dairy, baby products). Use classes: Food additives.

Is Calcium ascorbate hazardous?

No GHS hazard classification for Calcium ascorbate is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Calcium ascorbate?

Calcium ascorbate is usually classified under HS code 293627 (Vitamin C and its derivatives). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Calcium ascorbate?

CompoundList lists 65 suppliers of Calcium ascorbate in United States, India, China, Australia and 15 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Calcium ascorbate in India?

13 suppliers in India list Calcium ascorbate on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Calcium ascorbate?

Suppliers quote Calcium ascorbate on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Calcium ascorbate

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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