Acetone: High concentrations can cause dizziness and loss of consciousness. It can irritate the skin, eyes, nose and throat.

Aluminum Oxide: It can irritate the eyes, nose and throat. Repeated high exposure can cause scarring of the lungs and shortness of breath.

Ammonia: Long-term exposure can cause irritation of the eyes, nose, mouth and throat. It also can irritate the lungs and burn the eyes and skin.

Benzene: This is a cancer-causing agent that has been shown to cause leukemia; it also may cause headaches and irritation of the eyes, nose and throat. High exposure can cause convulsions and death.

Ethylbenzene: It can irritate the eyes, nose and throat; high concentrations can lead to dizziness and loss of consciousness. Repeated contact can cause drying and scaling of skin and may cause liver damage.

Ethylene Glycol: This can irritate the eyes, nose and throat and cause nausea, vomiting and headaches. It may cause birth defects. Repeated or high exposure can lead to kidney damage or stones. Brain damage also may occur.

Freon 113: It may cause skin irritation and rashes as well as drowsiness. Freon also contributes to the "greenhouse effect".

Glycol Ethers: These can irritate the eyes, nose and throat and may cause birth defects. Repeated or high exposure can cause kidney damage or stones. Brain damage also may occur.

Methyl Ethyl Ketone: Exposure can cause dizziness, headaches, blurred vision and loss of consciousness. It may cause birth defects.

Hydrochloric Acid: It can irritate the lungs and high exposure can cause buildup of fluid in the lungs, which can cause death.

Lead: It can cause weakness and insomnia. Higher exposure can result in damage to the nervous and reproductive systems.

Methyl Isobutyl Ketone: This irritates the skin, eyes, nose and throat, and may cause dizziness, nausea, diarrhea and loss of consciousness. Long-term exposure may damage the liver and kidneys.

Methanol: It irritates the eyes, nose, mouth and throat and can cause liver damage.

Phenol: Long-term exposure may damage the liver and kidneys and lead to genetic damage. It can irritate the mouth, nose, throat and eyes. It may be a cancer risk; major skin contact or inhaling of it can lead to death.

Sodium Hydroxide: Breathing the dust or droplets can irritate and burn the lungs. Contact can cause severe skin burns.

Sulfuric Acid: This can severely burn the skin and eyes. Repeated long-term exposure can cause bronchitis, shortness of breath and perhaps emphysema.

Tetrachloroethylene: This suspected human carcinogen has caused liver cancer in animals. It may damage the liver and kidneys after low but repeated exposure. It can cause dizziness and loss of consciousness.

1,1,1-Trichloroethane: It may cause mutations in cells; can irritate the skin and eyes and cause unconsciousness and death. High exposures may damage the liver and kidneys.