Ammonium Thiosulphate 60% Solution is a clear, colourless liquid manufactured from ammonium bisulphite solution, elemental sulphur and ammonia solution.
The product is typically supplied in bulk tanks, 200 litre drums and 1000 litre IBC’s for use as a photographic chemical for fixer baths.
■ Product data and typical properties
Molecular weight: 148.21
Specific gravity (20°C): 1.33 (typical)
Crystallisation temperature: 5°C approx.
Appearance: Clear and colourless liquid
Colour: Hazen < 5
Assay: % (NH4)2S2O3 60.0 ± 1.0
Total Alkalinity: % NH4OH 0.9 ± 0.6
Sulphites: % (NH4)2SO3 < 1.0
Iron: % as Fe < 0.0002
The product supplied to this specification meets the requirements of BS 3310:1998, ISO 3619-1976 (photographic grade ammonium thiosulphate solution).
The product is tested using our standard analytical methods.
Road tankers, according to transport regulations.
1000 litre intermediate bulk containers (IBCs), 200 and 25 litre polyethylene drums.