I've heard from many people that HMDS is very, very bad for you. However, the few MSDSs that I have read do no indicate that it is anything other than a strong irritant and highly flammable. Why do people seem to think it is a teratogen, mutagen, carcinogen, etc? Do some MSDS's have more information than others? If so, can someone point me toward one that explains hazards other than irritation and flammability. Jennifer