There are 24,833 individual posts for the years 2003 through 2021. New postings appearing on the DCHAS-L distribution list are added to the archives within a week or two of their email delivery.
The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to secretary@dchas.org. The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.