Chemical name

 CAmmonum Thiosulphate Liquid

Structural formula

Molecular formula

(NH4)2S2O3

CAS NO.

 7783-18-8 

Molecular weight

148.19

Properties

Colorless transparent liquid or white crystal. Relative density of liquid: 1.31-1.33,easily soluble in water,insoluble in alcohol, ether,slightly soluble in acetone. 

Specifictions

56-60%

Packing

250kg plastic drum, flexitank, IBC-tank or following your demand.

Uses                          

 Mainly used in color positive, negative, color reversal film, color film and paper washing, as a fixing agent

項目

指標

外觀

無色透明液體

含量  %

53—60

堿度（NH4OH）%

0.3--1.5

灼燒殘渣 %

≤0.1

重金屬（Pb）%            

≤0.001

亞硫酸鹽 %

≤1.0

硫化物（S）%               

≤0.001

密度20°C)

1.290--1.346

不溶物 % 

≤0.2

鐵（Fe）%                        

≤0.001

PH值（25℃）

8--9