Sodium Thiosulphate Powder (Pentahydrate)

DESCRIPTION

Sodium Thiosulphate Powder (Pentahydrate) Technical Grade has a wide range of applications related to water treatment and chemical reactions. Used to dechlorinate ballast waters prior to discharge to the environment, and as a dechlorinating agent for any water that has been treated with chlorine as a disinfectant. This is important because excess chlorine can be harmful to marine life and can also cause corrosion and other damage to equipment on board ships.

The solution is readily available from New Age Chemicals as Sodium Thiosulphate 30% Solution.

USE AND DOSING

De-chlorination: Instructions are based on experience and are meant only as a guide since circumstances for each de-chlorination process vary. They are not intended to interfere with the judgment of the vessel’s responsible personnel.

Prepare a 40% solution in water and administer it at a rate of 9.0 ml per cubic meter of solution for every 1 ppm of free chlorine in the water being treated. Use New Age Chemicals Free Chlorine Test Kit to track the decrease in free chlorine levels. For ongoing applications, ensure the use of a suitable storage tank and a chemical dosing pump.

CHARACTERISTICS

Property		Specification
Form		White crystalline powder
CAS No		10102-17-7
Formula		Na2S2O3.5H2O
Purity		>99%
pH (10% solution)		6.5 – 8.0
Freezing point (30% solutions)		-10oC
Iron		<5.0 mg/kg
Heavy metals		<3.0 mg/kg
Solubility		Fully soluble in water
Density		1.20 – 1.30 g/cm3