Tetra Sodium Pyrophosphate

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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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