Table 7. Organization for Economic Co-operation and Development (OECD)’s guideline for the testing of chemicals1)

No. Name Species Number Sex Exposure
Acute toxic studies
 401 Acute oral toxicity Mammalian 5 males and 5 females Both < 24 hours
 402 Acute dermal toxicity: fixed dose procedure Adult rat or healthy young adult animals Sequential manner with 2 animals Female < 24 hours
 403 Acute inhalation toxicity Healthy young adult animals 5 males and 5 females One or both 4 - 6 hours
 404 Acute dermal irritation/corrosion Albino rabbit or healthy young adult rabbits - - 4 hours
 405 Acute eye irritation/corrosion Albino rabbit or healthy young adult rabbits - - 8 – 24 hours
 420 Acute oral toxicity – fixed dose procedure Rodent species or healthy young animals 5 animals Female < 24 hours
 423 Acute oral toxicity – acute toxic class method Rodent species or healthy young animals 6 animals (3 animals per step) Female < 24 hours
 425 Acute oral toxicity: up-and-down procedure Rodent species or healthy young adult animals 5 animals Female < 24 hours
Sub-chronic toxic studies
 407 Repeated dose 28-day oral toxicity study in rodents Rat or other rodents 5 females and 5 males Both 28 days
 408 Repeated dose 90-day oral toxicity study in rodents Rat or other rodents 10 females and 10 males Both 90 days
 409 Repeated dose 90-day oral toxicity study in non-rodents Dogs, pigs, or mini-pigs 4 females and 4 males Both 90 days
 410 Repeated dose dermal toxicity: 21/28-day study Adult rat, rabbit, or guinea pigs 5 females and 5 males Both 21/28 days
 411 Subchronic dermal toxicity: 90-day study Adult rat, rabbit, or pigs 10 females and 10 males Both 90 days
 413 Subchronic inhalation toxicity: 90-day study Healthy young adult rodents 10 females and 10 males Both 90 days
Chronic toxic studies
 452 Chronic toxicity studies Rodents 20 animals per sex per group Both 12 months
Data from Organisation for Economic Co-operation and Development [69,74-76,79-86,100-102].