Examples of Purity of Parent Compounds Used for Safety Tests
Safety studies with diazinon used parent compound of 99.5% purity..
For details see: The reconsideration of approvals of the active constituent diazinon, registrations of products containing diazinon and approval of their associated labels. Part 2 Preliminary Review Findings Volume 2 of 2 Technical Reports, June 2006. Australian Pesticides & Veterinary Medicines Authority. Canberra Australia
Safety studies with chlorpyrifos oxon used parent compound of very high purity.
Nolan RJ, Rick DL, Freshour NL, Saunders JH. (1984) Chlorpyrifos: pharmacokinetics in human volunteers. Toxicol Appl Pharmacol; 73: 8–15.