CALCIUM ASCORBATE

Details:

CALCIUM ASCORBATE

                                                            Description

Calcium Ascorbate is an odorless white to pale yellow crystalline powder. The color may change to pale
yellow on prolonged storage time. Calcium Ascorbate easily dissolves in water, hardly dissolves in ethanol
and is insoluble in chloroform and ethoxyethane.

                                                      Product identification

Chemical names:                                           Calcium di{(R)-2-[(S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2H-
                                                          furan-3-olate}dehydrate.
Synonyms:                                                 calcium ascorbate dihydrate; calcium L-ascorbate; ascorbic acid
                                                          (calcium salt); vitamin C (calcium salt)
CAS No.:                                                  5743-28-2 (as dihydrate)
Einecs No:                                                227-261-5
E No:                                                     E 302
Empirical formula:                                        C12H14CaO12•2H2O
Molecular mass:                                           426.35 g/mol

                                                          Specifications

Appearance:                                               white to pale yellow crystalline powder
Identity:                                                 corresponds
Specific rotation, 589 nm (c=10 in water):                +95° to  +97°
Loss on drying:                                           max. 0.1%
Heavy metals:                                             max. 10 ppm
Lead:                                                     max. 2 ppm
Mercury:                                                  max. 0.1 ppm
Cadmium:                                                  max. 1 ppm
Fluorides:                                                max. 10 ppm
Arsenic:                                                  max. 3 ppm
PH:                                                       6.8-7.4
Residual methanol:                                        93000ppm
Assay:                                                    98.0-101.0% (method :Titration)
Total plate count:                                        91000CFU/g
Total molds yeasts:                                       9100CFU/g
Coliform organisms:                                       Negative

                                                             Solubility

Calcium Ascorbate easily dissolves in water, hardly dissolves in ethanol and is insoluble in chloroform and
ethoxyethane.

                                                      Stability and storage

Calcium Ascorbate is fairly stable to air if protected from humidity, but is slightly sensitive to heat.
It is less susceptible to discoloration than ascorbic acid. Calcium ascorbate is suitable for use in
dry preparations only, because its solutions have a tendency to form precipitates of calcium
oxalate. The product may be stored for 24 months from the date of manufacture in the unopened
original container and at room temperature below 25°C. On prolonged storage, a slight yellow
discoloration may occur which, however, does not affect the biological activity.