Tetra Potassium Pyrophosphate

PHOSPHATE

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焦磷酸钾(TKPP)

Tetra Potassium Pyrophosphate

化学式：K4P2O7

Chemical formula：K4P2O7

分子量：330.34

Molecular weight：330.34

性状：白色粉末或块状，表观比重0.3以上，熔点1100℃，溶于水，不溶于醇，水溶液呈碱性。在水中溶解度大，（25℃时溶解187克/100克水），稍有潮解性。

Property:white powder or mass, specific gravity: 2.534, M.P.: 1109 ; Soluble in water, insoluble in ethanol and its aqueous solution is alkali. Solubility(25 ): 187g/100g water; PH (1% aqueous solution): 10.2; It has the same properties as other condensed phosphate.

技术指标：Technical Specifications：

序号 No.		指标名称 Specifications	工业级 Tech grade	食品级 Food grade
1		主含量 % ≥ Main content	98.0	98.0
2		P2O5 % ≥	42.2	42.2
3		Cl % ≤	0.005	0.001
4		铁 % ≤ Fe	0.008	0.003
5		水不溶物 % ≤ Water insoluble	0.2	0.1
6		PH值 PH (2% water solution )	10.1-10.7	10.1-10.7
7		重金属 ≤ Heavy Metal（Pb）	0.003	0.001
8		氟 % ≤ F	0.001	0.001
9	砷 % ≤ As		0.005	0.0003
10	Loss on ignition % ≤		0.5	0.5

用途：主要用于无氰电镀、衣料用洗涤剂组分、金属和瓶子洗涤剂组分，各种清洁剂、添加剂和陶瓷工业的粘土分散剂，也可用作电镀的前处理剂和焦磷酸电镀液。

Uses: mainly used as complexing agent in cyanogen-free electroplating, substituting for sodium cyanide. It also can be used as pretreating agent in electroplating and pyrophosphoric acid electroplating solution, as ingredient and additive in all kinds of detergents and metal surface treating agent, as clay dispersant in ceramic industry, as dispersant and buffering agent in pigment and dyes, to remove a small amount of ferric ion from water in blanching and dyeing industry to improve quality.

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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