Ammonium thiosulphate

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1. Chemical name:Ammonium Thiosulphate
2. Structural formula:(NH4)2S2O3        
3. Molecular formula:
4. CAS NUMBER: 7783-18-8
5. Molecular weight:148.20
5. 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.
7. Quality standard:
Index name
Liquid
Solid
Assay
56~60%
°›98%
Appearance
colorless transparent Liquid
white crystal
Ammonium sulfite
°‹1.0%
°‹1.0%
Alkalinity
0.3~1.5%
°‹0.4%
Insoluble matter ( precipitation of Ca and Mg)
°‹0.2%
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Heavy metals(as Pb)
°‹0.001%
°‹0.002%
Fe
°‹0.00025%
°‹0.001%
Sulfide(as s)
°‹0.0002%
°‹0.0002%
Ignition residual
°‹0.1%
°‹0. 2%
Specific gravity
1.310~1.335
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8. Packing: Liquid 250kg plastic drum. Solid 25KG plastic woven bag.
9.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.

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