Particularly Hazardous Substances

Particularly hazardous substances (PHSs) at the University of Washington are those that present extreme hazards to personnel and property, and require stringent safeguards. These chemicals meet one or more of the criteria below.

Criteria for identifying a chemical as a "Particularly Hazardous Substance"

Highly Toxic (PDF)Chemicals in which a small dose can cause death or permanent injury or illness.
Highly Dangerous (PDF)Chemicals which can easily start on fire, react with the atmosphere, explode, etc.
Select Carcinogens (PDF)Chemicals identified by review agencies as causing, or highly suspected of causing cancer in humans.
Reproductive Toxins (PDF)Chemicals identified by review agencies as likely to cause harm in conceiving, bringing safely to term, or even affecting a baby after birth.
Select Toxins (PDF)Chemicals that are potential terrorist weapons due to toxicity.

The following lists were generated based on chemicals that have been used at the UW and meet at least one of the criteria above. These lists are not complete because chemicals are continually being added to UW inventories and because knowledge about chemical hazards is continually evolving.

Lab staff should review MSDSs and SDSs and the characteristics of the chemicals they work with to determine if additional chemicals in use in the laboratory would fall within the criteria and require additional safeguards.

PHS-1 (PDF) Listed alphabetically
PHS-2 (PDF) Listed by Chemical Abstracts Service (CAS) Registration Number