The delightful (read: sickening) other side of the same coin is that many such known carcinogens and other toxins *have* been tested and declared safe by an unethical process of essentialy testing the substance on every possible breed of every possible species in every possible manner until the desired "safe" result is obtained, and all other results declared "anomalous" or just outright destroyed/ignored. Then if anyone says "this product contains known carcinogen X" the manufacturers have the security of pointing to the test results and saying "well it's been animal tested and it's safe, ha-ha-ha, you can't sue us!"
Rather than being exceptional this is a standard practice in all areas of the vivisection industry, but *especially* cosmetic and agrichem testing.