Calcium Propionate USP NF Grade Specifications:
C6H10CaO4 --- 186.22 CAS 4075-81-4

DEFINITION
Calcium Propionate contains NLT 98.0% and NMT 100.5% of calcium propionate (C6H10CaO4), calculated on the anhydrous basis.

IDENTIFICATION
A. A solution of Calcium Propionate (1 in 20) imparts a transient yellowish red color to a nonluminous flame.

ASSAY
Procedure
Sample solution: 4 mg/mL of Calcium Propionate
Analysis: While stirring, preferably with a magnetic stirrer, add 30 mL of 0.05 M edetate disodium from a 50-mL burette to 100 mL of the Sample solution. Add 15 mL of 1 N sodium hydroxide and 300 mg of hydroxy naphthol blue indicator and continue the titration to a blue endpoint. Each mL of 0.05 M edetate disodium is equivalent to 9.311 mg of calcium propionate (C6H10CaO4).
Acceptance criteria: 98.0% to 100.5% on the anhydrous basis

Calcium Propionate FCC Food Grade Specifications:
(CH3CH2COO)2Ca
C6H10CaO4 Formula weight 186.22
INS: 282 CAS: 4075-81-4

DESCRIPTION
Calcium Propionate occurs as white crystals or as a crystalline solid. The pH of a 1:10 aqueous solution is between 7.5 and 10.5. One-gram dissolves in about 3 mL of water.
Function: Preservative; mould inhibitor.

REQUIREMENTS
Identification:
A. A 1:20 aqueous solution gives positive tests for Calcium.
B. Upon ignition at a relatively low temperature, a sample yields an alkaline residue that effervesces with acids.
Assay: Not less than 98.0% and not more than 100.5% of C6H10CaO4, calculated on the anhydrous basis.
Fluoride: Not more than 0.003%.
Insoluble Substances: Not more than 0.2%.
Lead: Not more than 2 mg/kg.
Magnesium (as MgO): Passes test (about 0.4%).
Water: Not more than 5.0%.