Name | sour jujube pigment |
Synonyms | sour jujube pigment |
Physical and Chemical Properties | Chemical properties dark brown powder, soluble in alkali, slightly soluble in hot water, insoluble in acid and alcohol. Stable to metal ions, good acid and alkali resistance, strong reduction resistance, light resistance and oxidation resistance. The oral LD50 of mice was 6.81 g/kg. |
Use | Use as food colorants, China's provisions can be used for sweets and cakes, the maximum use of 0.2g/kg; In the juice (taste) drinks, soy sauce and pickles in the maximum use of 0.1g/kg. |
using clean wild jujube peel as raw material, soaking and heating with 5% sodium carbonate solution or 2% sodium hydroxide for several minutes, filtering with 0.175mm and 0.074mm nylon yarn in turn, neutralizing the filtrate with dilute hydrochloric acid to pH value of 7-8, then adding calcium chloride solution until precipitation is complete, and heating aging precipitation; Filter, wash and precipitate until chlorine-free, and then dry at 100~105 ℃, crushed 0.11mm nylon yarn is the jujube pigment.