sodium thiosulfate, Na2S2O3,competitive price, good quality, professional experience to 10 countrires. Sodium thiosulfate, Na2S2O3. Property:Single crystal is white crytallized powder, 1.667 proportion, soluble in water, alcohol, in air heating is decomposed into sodium and sulfur dioxide oxidation. Application: Mainly used for fixing agent photography industry. Secondly as tanning time chromate ...