Malathion is an organophosphate parasympathomimetic which binds irreversibly to cholinesterase, is an insecticide of relatively low human toxicity.
Molecular Weight | 330.36 |
CAS Number | 121-75-5 |
Solubility (25°C) | DMSO 90 mg/mL |
Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
[1] Yoshikazu Yamagishi, et al. Effects of human serum albumin on post-mortem changes of malathion
[3] Tatenda Madzorera, et al. Malathion-filled trilayer polyolefin film for malaria vector control
[4] Baljinder Singh, et al. Microbial degradation of an organophosphate pesticide, malathion
[5] Shereene Idriss, et al. Malathion for head lice and scabies: treatment and safety considerations
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