Calcium diacetate

Calcium diacetate is a preservative and sequestrant, used against mould in baked goods and as a calcium source.

Where it is and isn’t permitted

Status of Calcium diacetate by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationPermitted21 CFR 182.6197retrieved 2026-09-07
Codex AlimentariusCodex Alimentarius Commission / JECFANot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.

What it is made from

Made by reacting acetic acid with a calcium source.

  • Vegan
  • Vegetarian
InChIKey
VSGNNIFQASZAOI-UHFFFAOYSA-L
PubChem
CID 6116

Every name it appears under

52 recorded names. A label may use any of them.

E number

  • E263

CAS registry number

  • 62-54-4

As it appears in regulation

  • Calcium diacetate

Other names

  • Acetate of lime
  • acetatedecalcium
  • Acetic acid, calcium salt
  • Acetic acid, calcium salt (2:1)
  • Aceticacid,calciunsalt
  • Brown acetate
  • Brown Acetate of Lime
  • C4H6CaO4
  • Ca(OAc)2
  • Calcarea acetica
  • Calcium acetate
  • Calcium acetate (USP)
  • Calcium acetate (water < 5%)
  • Calcium Acetate 667 mg
  • Calcium acetate anhydrous
  • Calcium Acetate Capsules 667 mg
  • CALCIUM ACETATE EXTRA PURE, FCC, E 263
  • CALCIUM ACETATE HYDRATE PURE
  • CALCIUM ACETATE HYDRATE, 99.99%
  • calcium acetate salt
  • CALCIUM ACETATE SIGMAULTRA
  • Calcium diacetate
  • calcium ethanoate
  • calcium(II) acetate
  • calciumacetate
  • Calphron
  • CCRIS 4921
  • Eliphos
  • Everose
  • FEMA No. 2228
  • Gray acetate
  • Gray Acetate of Lime
  • HSDB 928
  • INS NO.263
  • INS-263
  • Lime acetate
  • Lime pyrolignite
  • mineral supplement containing calcium acetate
  • Phosex
  • PhosLo
  • Phoslo (TN)
  • Phoslo Gelcaps
  • Phoslyra
  • Renacet
  • Sanopan
  • Sorbo-calcion
  • Teltozan
  • vinegarsalts
  • Y882YXF34X

Hazard reference values

No reference value for this substance in the sources we hold.

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • ecfr retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/calcium-diacetate.json