一、化学名：焦磷酸钠
二、分子式：Na4P2O7 , Na4P2O7·10H2O
三、分子量：无水物265.90；十水合物446.10
四、CAS：
五、性能：无色透明结晶或白色结晶粉末。相对密度2.534，熔点880℃,易溶于水，不溶于醇。在干燥空气中风化，在100℃失去结晶水。在空气中易吸收水分而潮解。
六、用途：在食品工业中作为食品品质改良剂，PH调节剂，金属离子螯合剂，乳化分散剂，粘合剂等。用于肉类及水产加工，可提高持水性，使肉质鲜嫩，稳定天然色素，防止脂肪腐败，另外，也用于酵粉，乳酪制造等
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质量指标 |
Specification |
GB |
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|
含量 |
以Na4P2O7计， w/% |
Content（Na4P2O7） |
96.5~100.5 |
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|
以Na4P2O7·10H2O计，w/%≥ |
Content（Na4P2O7·10H2O） |
98.0 |
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|
水不溶物，w/% ≤ |
Water Insolubles |
0.2 |
|||
|
pH值（10g/L） |
PH Value |
9.9~10.7 |
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|
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 |
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Chemical Name: SODIUM PYROPHOSPHATE
Molecular Weight: Anhydrous 265.90, decahydrate 446.10
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.
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.
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