Commission Regulation (EU) 2017/1399 of 28 July 2017 amending Annex II to Regulation (EC) No 1333/2008 of the European Parliament and of the Council and the Annex to Commission Regulation (EU) No 231/2012 as regards potassium polyaspartate (Text with EEA relevance. )
"E 456 | Potassium polyaspartate" |
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 | [C |
Weight average molecular weight | Approximately |
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) |
A light brown odourless powder | |
Solubility | Very soluble in water and slightly soluble in organic solvents |
pH | 7,5-8,5 (40 % aqueous solution) |
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" |