Cumulative irritancy in the guinea pig from low grade irritant vehicles and the angry skin syndrome.

A 4-week open cumulative irritancy test in guinea pigs discriminated between two low grade irritant vehicles, nonionic base (anhydrous) and hydrophilic ointment. The procedure might be useful as a predictive test for low grade irritants. The angry skin syndrome was established in the guinea pigs by one Freunds complete adjuvant intradermal injection on day 0, or by daily open applications of 10% sodium lauryl sulfate in petrolatum to the neck area of the animals.