Synonyms | |
Definition |
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Einecs | 252-487-6 |
Chemical name | Sodium ethyl p-hydroxybenzoate; Sodium compound of the ethyl ester of p-hydroxybenzoic acid |
Chemical formula | C9H9O3Na |
Molecular weight | 188,8 |
Assay | Content of ethylester of p-hydroxybenzoic acid not less than 83 % on the anhydrous basis |
Description | White, crystalline hygroscopic powder |
Identification |
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Melting range | 115 °C to 118 °C, after vacuum drying in a sulphuric acid desiccator |
Test for p-hydroxybenzoate | Melting range of p-hydroxybenzoic acid derived from the sample is 213 °C to 217 °C |
Test for sodium | Passes test |
pH | 9,9-10,3 (0,1 % aqueous solution) |
Purity |
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Loss on drying | Not more than 5 %, (by vacuum drying in a sulphuric acid desiccator) |
Sulphated ash | 37 to 39 % |
p-Hydroxybenzoic acid and salicylic acid | Not more than 0,35 % expressed as p-hydroxybenzoic acid |
Arsenic | Not more than 3 mg/kg |
Lead | Not more than 2 mg/kg |
Mercury | Not more than 1 mg/kg |