INDUSTRIAL RAW MATERIALS
Industrial raw materialsINDUSTRIAL RAW MATERIALS
焦磷酸钠(TSPP)
Tetra Sodium Pyrophosphate
化学式：Na4P2O7
Chemical formula：Na4P2O7
分子量：265.9
Molecular weight：265.9
英文别名：Disodium dihydrogenpyrophosphate
CAS号：7722-88-5
执行标准：HG/T2968-1988(工业级）, GB8848-88（食品级）
Standard executed:HG/T2968-1988(Tech grade）, GB8848-88（Food grade）
性状：白色粉末，易溶于水，不溶于醇，相对密度2.45g/cm³,熔点890℃,水溶液呈弱碱性，在空气中易潮解，水溶液在70℃下较稳定，煮沸则水解成磷酸氢二钠。
Property：White powder, easily soluble in water but insoluble in ethanol; Density at 2.45g/cm³ and melting point at 890℃; Deliquescent in the open air. The water solution shows weak alkalinity and stable at 70℃, but will be hydrolyzed into disodium phosphate when boiled.
技术指标：Technical Specifications：
序号No
指标名称Specifications
工业级Industrial grade
食品级Food grade
1
外观Appearance
白色粉末White Powder
2
主含量
Assay（as Na4P2O7） %≥
96.5
96.5
3
五氧化二磷
Phosphorus pentoxide(P2O5) %≥
51.5
51.5
4
氟化物
F % ≤
-
0.005
5
PH值（1%水溶液）
PH value of 1% solution
9.9—10.7
9.9-10.7
6
水不溶物
Water insoluble % ≤
0.2
0.2
7
重金属
Heavy metals, as Pb %≤
0.01
0.001
8
砷
Arsenic, as As %≤
0.01
0.0003
9
灼烧失重
Loss on ignition %≤
0.5
0.5
用途：在工业中用于洗涤助剂，造纸漂白，电镀工业；在食品中用作缓冲剂，乳化剂，营养剂和品质改良剂等。
Uses: Applied in industry as detergent auxiliary , paper production to bleach and electroplating. In food, it is mainly used as buffering agent, emulsification agent, and nutrition ingredients , and quality improver, etc.
包装：内塑外编，每袋净重25 Kg、 50Kg 、1000Kg，贮于通风干燥处。
Packing：Plastic woven bag. Net weight 25 Kg、 50Kg 、1000Kg , store at a cool, dry and well ventilated place.
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