The following is what I recall from a few years back. Correct me if I have miss stated any information below.
Chem Cote is a product trademark of the Chemetall Company. Chem Cote is often used as a surface treatment which is officially known as chromate conversion. This is similar to the use of trademarks such as Asprin, Lexan, etc. CPFers are familiar with the term Lexan which is a trademark of General Electric and officially known as polycarbonate.
RoHS stands for the UK Restriction of Hazardous Substances. RoHS conformity of products comprising or integrated into Electrical and Electronic Equipment (EEE) is a requirement for products intended for entry into European markets.
Chromate conversion coatings such as the original Chem Cote contained chromium compounds (including hexavalent chromium). Hexavalent chromium is strictly requlated due to the compound's toxicity and suspected carcinogenicity.
As I recall, chromate conversions such as Chem Cote will outgas as the temperature rises. I seem to recall the complete break down occurs around 140 degree F. I for one would not be sniffing the Surefire tubes or any other flashlight tubes. Hexavalent chromium vapors are not good for you.
