EPA analysis of Sea Brat 4 seems shallow to me. Toxicity data not meaningful to me. The solvent is propyline glycol.
Seabrat

According to an article in Wikipedia, propylene glycol is much less toxic than ethylene glycol.
Although it is approved as an additive to dog food, it is barred from cat food. Some people are allergic to it.
This brings up the thought that it may be toxic to various forms of sea life (and bird life) and thus affect the ecologic interactions of marine life.

propylene glycol