Annex II
United Kingdom
In the Annex to Regulation (EU) No 231/2012, the following new entry is inserted after the entry for food additive E 452(iv):
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E 456 POTASSIUM POLYASPARTATE Synonyms Definition Potassium polyaspartate is the potassium salt of polyaspartic acid, produced from L-aspartic acid and potassium hydroxide. The thermic process transforms the aspartic acid in polysuccinimide that is insoluble. Polysuccinimide is treated with potassium hydroxide allowing the opening of the ring and polymerisation of the units. The last step is the spray drying phase, which results in a light tan powder CAS number 64723-18-8 Chemical name L-aspartic acid, homopolymer, potassium salt Chemical formula [C4H4NO3K]n Weight average molecular weight Approximately 5 300 g/mol Assay Not less than 98 % on dry weight basis Particle size Not less than 45 μm (not more than 1 % in weight of particles of less than 45 μm) Description A light brown odourless powder Identification Solubility Very soluble in water and slightly soluble in organic solvents pH 7,5-8,5 (40 % aqueous solution) Purity Degree of substitutions Not less than 91,5 % on dry weight basis Loss on drying Not more than 11 % (105 °C,12 hours) Potassium hydroxide Not more than 2 % Aspartic acid Not more than 1 % Other impurities Not more than 0,1 % Arsenic Not more than 2,5 mg/kg Lead Not more than 1,5 mg/kg Mercury Not more than 0,5 mg/kg Cadmium Not more than 0,1 mg/kg ’