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Formula: CaS2O3
Formula weight: 152.2
Calcium Thiosulfate: 30% w/v 30% w/v
pH: 6.5 to 7.5 6.5 to 7.5
Specific gravity: 1.240 1.240
Appearance: Clear solution
Physical properties: 10.34 lbs/gal 193 gal/ton
Solubility: Soluble in water
D.O.T. Designation: Not regulated

Captor® is used in Arden Industries Bazooka with liquid feed configuration for dechlorination of super-chlorinated water mains and fire hydrant flushing programs.


Captor (calcium thiosulfate solution) is a relatively new product now available to the potable water and wastewater treatment industries. Captor is a nearly odorless, colorless, non-hazardous, non-toxic solution. It is certified in accordance with ANSI NSF Standard 60 for drinking water applications.


Captor is now solving a number of traditional problems for water and wastewater treatment plant operators. Tank and line heating are generally not needed, and the product presents no problem with off-gassing. In ozone destruction, Captor is more efficient and requires lower dosing rates than other chemicals.


Because it is  non-toxic and environmentally friendly, Captor can be shipped via UPS and carried in the back of city trucks without requiring special handling placards.

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