Type in the following
The home page will come up on your screen. In the top line, there is a wee search box. Type in the word " benzene" and ask it to search. It is the wrong chemical but it gets you to the right place. The very first entry is entitled" What do you have to say about the presence of benzene in fibre..." That is the question I sent Dr Burch and her reply follows.
I am rather comforted by her reply and I feel it is important for fabric dyers to read and to understand. Dr. Burch's website is very very interesting! Enjoy.