Ammonium thiosulfate is a kind of Colorless transparent liquid, which be used in photo application.

Spec for ammonium thiosulfate as below:

Items	Specifications:
Color (pt-Co Scale)	15 Max
Assay	56~60
Ammonium sulfite	1.0 Max
Alkalinity	0.3~1.5
Insoluble matter ( precipitation of Ca and Mg)	0.2 Max
Iron	0.00025 Max
Sulfide(as S)	0.0002 Max
Ignition residual	0.1 Max
Density at 20 oC	1.32-1.335
Heavy metals(as Pb)	0.001 Max

Ammonium Thiosulphate is used as fixer for taking photographics,key component of silvering electrobath, shielding effect agent, casting protectant of Al-Mg alloy, bactericide and analytical reagent.

Ammonium thiosulfate solution