Ammonium Thiosulphate

Colorless transparent liquid or white crystal,Used as fixer for takingPhotographic s,key component of silvering electrobath,. Ammonium Thiosulphate1. Chemical name:Ammonium Thiosulphate 2. Structural formula:3. Molecular formula:(NH4)2S2O34. Molecular weight:148.205. Properties:. Colorless transparent liquid or white crystal. Relative density of crystal: 1.679,easily soluble in water,insoluble in alcohol, ether,slightly soluble in acetone. 6. Quality standard:

Item	Liquid	Solid
Appearance	colorless transparent Liquid	white crystal
Assay	58-60%	≥98%
Ammonium sulfite	≤1.0%	≤1.0%
Alkalinity	0.3-1.5%	≤0.4%
Fe	≤0.00025%	≤0.001%
Insoluble matter ( precipitation of Ca and Mg)	≤0.2%	----
Heavy metals(as Pb)	≤0.001%	≤0.002%
Sulfide(as s)	≤0.0002%	≤0.0002%
Ignition residual	≤0.1%	≤0.2%
Specific gravity	1.310-1.335	----

7. Packing: Liquid 250kg plastic drum. Solid 25KG plastic woven bag. 8.Uses: Used as fixer for takingPhotographic s,key component of silvering electrobath, shielding effect agent, casting protectant of Al-Mg alloy, bactericide and analytical reagent. 

Ammonium Thiosulphate