Kathon CG (MSDS)
These chemicals are present in some variation in nearly EVERY commercially available shampoo, soap, conditioner, etc. etc..
A quick glance at the wikipedia pages tells you the relation to the marine industry...
If you're too lazy, it's also used for: "glue production, detergents, paints [in particular on the hulls of boats.. why, you may ask? because silicons are waterproof!