The OECD 404 is an in-vivo test method that uses live animals to test the skin corrosion potential of chemicals. Many countries, including Canada, are banning animal testing for cosmetics and other consumer products. The Corrositex OECD 435 performed at Dell Tech is an in-vitro test method that uses a membrane made of a chemical that mimics the skin reaction to chemicals. Additionally, OECD 404 is 2 – 3 times more expensive than than the Corrositex in-vitro test method. And finally, the results for OECD 435 can be available as soon as 24 hours instead of 14 days.