S&D Chemicals, Ltd
UK. Supply and distribution of pharmaceutical active substances, dyestuffs, chemical intermediates and cosmetic raw materials.
http://www.sd-chemicals.com/

Agency for Toxic Substances and Disease Registry
Searchable database for publications and resources about the effect of hazardous substances on public health and the environment.
http://www.atsdr.cdc.gov/search

USGS Toxics Substances Hydrology Program
The Toxic Substances Hydrology Program provides science information needed to improve characterization and management of contaminated sites, to protect human and environmental health, and to reduce potential future contamination problems.
http://toxics.usgs.gov/

International Humic Substances Society
The Society is recognized as a world leader in fostering scientific education and research, and promoting public understanding of humic substances.
http://www.ihss.gatech.edu/

NIH Chemical Information Page
TOXNET provides access to a cluster of databases on toxicology, hazardous chemicals, and related areas. The databases are HSDB, CCRIS, GENE-TOX, IRIS, TRI, DART, EMIC and ChemID. Instruction manuals are included.
http://chem.sis.nlm.nih.gov/index.html

Hybrid Resource Control of Active Extensions
Combines dynamic and static checking; an extension of Click modular router, customized for active networking in Janos active network OS. Coded in Cyclone. Downloads: paper in PDF, Postscript gzip; slides in PDF, PowerPoint.
http://www.cs.utah.edu/flux/papers/hybrid-openarch03-base.html

NMR Solvents
Substances, drying and properties and other useful information about each.
http://www.chemie.uni-erlangen.de/oc/bauer/nmrsolvents.html

Curium
History and properties of the element, its isotopes, its spectrum, and its substances.
http://nautilus.fis.uc.pt/st2.5/scenes-e/elem/e09600.html

Active CHAOS
Active CHAOS is the utility program for safe interchange of the information.
http://www.safechaos.com/ac.htm

Carrageenans
Information on these substances extracted from Carrageen, Chondrus crispus, and used in processing food.
http://www.seaweed.ie/uses_general/carrageenans.lasso