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Calcium L-ascorbate dihydrate

CAS 5743-28-2 · 40/100 · High conf.

Also registered as 1 other CAS number

6381-95-9

Calcium L-ascorbate dihydrate chemical structure

Concern score

40/100Moderate concern based on regulatory listings.
High confidence

Calcium L-ascorbate dihydrate in plain language

What it is

Also known as Calcium ascorbate · Calcium ascorbate dihydrate · E302 · L-ascorbic acid, calcium salt (2:1), dihydrate · Calcium L-ascorbate dihydrate, 99% · E-302

Show all 14 names

Ins NO.302 · INS-302 · L-Ascorbic acid calcium salt dihydrate · L-Ascorbic acid, calcium salt, hydrate (2:1:2) · NCGC00257476-01 · Vitamin C calcium salt · Ester-c · Vitamin c (as calcium ascorbate)

What it does

Used in consumer products as an antioxidant and a conditioner.

  • Antioxidant
  • Conditioner
Is it a concern?
Moderate concern: no hazard classifications on record.

Why it's flagged

EPA CPDat observed this chemical in 31 composition records across product categories including Personal care.

The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.

Regulation

No restrictions found. Calcium L-ascorbate dihydrate appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Cleaning
  • EUEFSAEFSA opinion2 entries
    • Scientific Opinion on the safety and efficacy of vitamin C (ascorbic acid, sodium ascorbate, calcium ascorbate, ascorbyl palmitate, sodium calcium ascorbyl phosphate and sodium ascorbyl phosphate) as a feed additive for all animal species based on a dossier submitted by DSM Nutritional Products Ltd (EFSA FEEDAP)Source →
    • Calcium ascorbate, magnesium ascorbate and zinc ascorbate added for nutritional purposes in food supplements (EFSA ANS)Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 31 composition records across product categories including Personal care. EPA CPDat classifies this chemical for functional uses including Antioxidant, Softener and conditioner.
    • EPA CPDat observed this chemical in 31 composition records across product categories including Personal care. EPA CPDat classifies this chemical for functional uses including Antioxidant, Softener and conditioner.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

Independent scientific assessments cited by the records we hold, with the year and link where the record gives one.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

  • JECFA

    Joint FAO/WHO Expert Committee on Food Additives

    No JECFA evaluation on file.

  • EFSA

    European Food Safety Authority

    • Scientific Opinion on the safety and efficacy of vitamin C (ascorbic acid, sodium ascorbate, calcium ascorbate, ascorbyl palmitate, sodium calcium ascorbyl phosphate and sodium ascorbyl phosphate) as a feed additive for all animal species based on a dossier submitted by DSM Nutritional Products Ltd (EFSA FEEDAP)

      2013 · EU EFSA listing · Read the source →

    • Calcium ascorbate, magnesium ascorbate and zinc ascorbate added for nutritional purposes in food supplements (EFSA ANS)

      2009 · EU EFSA listing · Read the source →

Evidence & sources

No graded research studies for Calcium L-ascorbate dihydrate yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

6 data sources

Where this comes from

  • EFSA OpenFoodTox

    regulatory · updated 2026-10-04

    Open →

  • EPA Chemical and Products Database

    exposure · updated September 2018

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

  • PubChem Live Enrichment

    chemistry · updated 2026-05-17

    Open →
Reference links (3)
Openfda substance

codexalimentarius.net

Read →
Openfda substance

askville.amazon.com

Read →
Openfda substance

drugoffice.gov.hk

Read →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Food use

Food-use source coverage is present in the current record.

Good fit

The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.

Fragrance avoidance

No fragrance-linked caution surfaced in the current profile.

Good fit

This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.

Where it has been recorded

How often EPA CPDat has listed Calcium L-ascorbate dihydrate in a product composition. These are source records, not Greenveil catalog products.

Source records

31

Named organisations

6

Personal care

Typical roles

AntioxidantConditioner
See products using Calcium L-ascorbate dihydrate →

Catalog

Found in these products

Their ingredient lists include Calcium L-ascorbate dihydrate; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 7 →Find products without it →