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English name: Ammonium Thiosulphate, Ammohypo
CAS No: 7783-18-8
Molecular formula: (NH4)2S2O3
Molecular weight: 148.2
Technical indicators
Project | Index |
Exterior | Colorless transparent liquid |
Content % | 53—60 |
Alkalinity (NH4OH)% | 0.3--1.5 |
Burning residue % | ≤0.1 |
Heavy metal (Pb)% | ≤0.001 |
Sulfite % | ≤1.0 |
Sulfide (S)% | ≤0.001 |
Density 20°C | 1.290--1.346 |
Insolubles % | ≤0.2 |
Iron (Fe)% | ≤0.001 |
PH value (25℃) | 8--9 |
Uses: Mainly used for color positive film, negative film, color reversal film, color film and photographic paper, as a fixer.
Packing: Liquid ammonium thiosulfate can be packed in plastic barrels, with a net weight of 250kg per barrel.
Manufacturing
