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Prepared at the 51st JECFA (1998), published in FNP 52 Add 6 (1998) superseding specifications prepared at the 23rd JECFA (1979), published in FNP 12 (1979) and republished in FNP 52 (1992). Group ADI "not specified" for glucono-delta-lactone and gluconates, excluding ferrous gluconate, established at the 51st JECFA in 1998. |
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SYNONYMS |
INS No. 576 |
DEFINITION | |
Chemical names |
Sodium D-gluconate |
C.A.S. number |
527-07-1 |
Chemical formula |
C6H11NaO7 |
Structural formula |  |
Formula weight |
218.14 |
Assay |
Not less than 98.0% |
DESCRIPTION |
White to tan, granular to fine, crystalline powder |
FUNCTIONAL USES |
Sequestrant, yeast food |
CHARACTERISTICS | |
IDENTIFICATION | |
Solubility |
Very soluble in water; sparingly soluble in ethanol |
Test for sodium |
Passes test |
Test for gluconate |
Passes test |
PURITY | |
Reducing substances |
Not more than 1.0% calculated as D-glucose (Method I) |
Lead |
Not more than 2 mg/kg Prepare a sample solution as directed for organic compounds in the Limit Test and determine by atomic absorption spectroscopy |
METHOD OF ASSAY |
Transfer about 150 mg of the sample, accurately weighed, into a clean, dry 200-ml Erlenmeyer flask, add 75 ml of glacial acetic acid and dissolve by heating on a hot plate. Cool, add quinaldine red TS, and titrate with 0.1 N perchloric acid in glacial acetic acid, using a 10-ml microburet, to a colourless end point. Each ml of 0.1 N perchloric acid is equivalent to 21.81 mg of C6H11NaO7. |