1. Industrial Grade: 99%min. 2. Prompt Shipment. 3. More than 25 years export experiences ... Manufactory Sodium ThiosulphateMolecular formula: Na2S2O3·5H2OSpecification:ItemSpecificationsSodium hyposulfite (Na2S2O3·5H2O), %≥99.0Substance insoluble in water,%≤0.01Sulphide(based on Na2S),%≤0 ... in dry and cool place.Our advantages:1. Industrial Grade: 99%min.2. Prompt Shipment.3. More than 25 years export ...