1、Chemical Name: SODIUM PYROPHOSPHATE2、Molecular Formula : Na4P2O7 , Na4P2O7•10H2O3、Molecular Weight: Anhydrous 265.90, decahydrate 446.104、CAS: 13472-36-15、Character: It’s colorless transparent crystal or white crystalline powder. The relative density is 2.534 and melting point is 880℃. It’s easily soluble in water and insoluble in ethanol. It will weather in dry air and lose crystal water in 100℃. It easily absorbs water to deliquesce in air.6、Usage: It is used as quality improver, regulator of PH value, chelating agent, emulsifier and binder in food industry. It also can be used in the processing of baking powder and cheese.7、Packing: It is packed with polythene bag as the inner layer, and a compound plastic woven bag as the outer layer. The net weight of each bag is 25kg.8、Storage and Transport: It should be stored in a dry and ventilate warehouse, kept away from water and moisture during transport, unload with care as to avoid being damaged. Furthermore, it must be stored separately from poisonous substances.
食品级焦磷酸钠十水合物国家标准指标如下:
| 质量指标 | Specification | GB25557-2010 | |||
| 含量 | 以Na4P2O7计, w/% | Content(Na4P2O7) | 96.5~100.5 | ||
| 以Na4P2O7·10H2O计,w/%≥ | Content(Na4P2O7·10H2O) | 98.0 | |||
| 水不溶物,w/% ≤ | Water Insolubles | 0.2 | |||
| pH值(10g/L) | PH Value | 9.9~10.7 | |||
| 正磷酸盐 | Orthophosphate | 通过试验 | |||
| 砷(以As计),mg/kg ≤ | Arsenic (As As) | 3 | |||
| 重金属(以Pb计), mg/kg ≤ | Heavy metal (As Pb) | 10 | |||
| 铅(Pb), mg/kg ≤ | Lead (as Pb) | 4 | |||
| 氟化物(以F计),mg/kg ≤ | Fluoride (As F) | 50 | |||
| 灼烧失重, w/% | 无水物 ≤ | Loss on Drying | anhydrous | 0.5 | |
| 十水合物 | decahydrate | 38.0-42.0 | |||


