【CAS】：6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzodioxathiepine 3-oxide
【CAS No.】：115-29-7
【Molecular Formula】：C9H6Cl6O3S

【Molecular weight】:406.9;

【Physical form】:Colourless crystals; (, cream to brown, mostly beige).

【Density】:c. 1.8 (20 °C) ();

【Composition】:Endosulfan is a mixture of two stereoisomers: alpha-endosulfan, endosulfan (I), stereochemistry 3a,5ab,6a,9a,9ab-, comprises 64-67% of the grade; beta-endosulfan, endosulfan (II

【Melting point】:>80 °C (); a- 109.2 °C; b- 213.3 °C;

【Vapour pressure】:0.83 (20 °C) for 2:1 mixture of a- and b- isomers; Henry constant:a- 1.48; b- 0.07 (both Pa m3 mol-1, 22 °C, );

【Partition coefficient(n-octanol and water)】:logP for a- = 4.74; b- = 4.79 (both at 5);

【Solubility】:In water alpha-endosulfan 0.32, beta-endosulfan 0.33 (both in /l, 22 °C). In ethyl acetate, dichloromethane, toluene 200, ethanol c. 65, hexane c. 24 (all in g/l, 20 °C).;

【Stability】:Stable to sunlight. Slowly hydrolysed in aqueous acids and alkalis, with the formation of the diol and sulfur dioxide.;
【Toxicology】:Oral:Acute oral 50 for rats 70 (in aqueous suspension)/, 110 (in oil)/, 76 alpha- isomer/, Percutaneous:Acute percutaneous 50 for rabbits 359 (in oil)/; for male rats >4000, female rats 500