10124-41-1 15899-76-0 CALCIUM THIOSULFATE Calcium hyposulfite Calcium thiosulfate (Ca(S2O3)) Calcium thiosulphate Caswell No. 153 EINECS 233-333-7 EPA Pesticide Chemical Code 080101 HSDB 2507 Tecesal Thiosulfuric acid (H2S2O3), calcium salt (1:1) Thiosulfuric acid, calcium salt (1:1)