I found this little tidbit in an article about cleaning products...
Ammonia: Fatal if swallowed; skin, lung, throat irritant; can cause blindness
Butyl Cellosolve: Irritation and tissue damage from inhalation
Formaldehyde: Known carcinogen
Hydrochloric Acid: Fatal if swallowed; concentrated fumes harmful
Naphtha: Depresses the central nervous system
Perchloroethylene: Damages liver, kidney, nervous system
Petroleum Distillates: Highly flammable; can damage lung tissue and nerve cells
Phenols: Extremely dangerous; suspected carcinogen
Propylene Glycol: Ingestion can damage kidneys, lungs, heart, and nervous system
Sodium Hydroxide (lye): Highly caustic. Contact can cause severe damage to eyes, skin, mouth, and throat; can cause liver and kidney damage
Sodium Hypochlorite (chlorine bleach): Contact can cause severe damage to eyes, skin, mouth, and throat; can cause liver and kidney damage; causes more poisoning exposures than any household chemical
Sodium Lauryl Sulfate: Skin irritant
Sulfuric Acid: Dangerous. Can burn skin. Exposure to concentrated fumes can be carcinogenic
Trichloroethane: Damages liver and kidney
Here's a link to the article for more information...
http://today.msnbc.msn.com/id/26903507/