Toxic List – N

Naphtha

See Petroleum distillates.

Neoprene

Neoprene is a form of synthetic rubber that is produced by the polymerization of chloroprene. Wetsuits, laptop sleeves, car fan belts, orthopedic braces, and many other products are made with neoprene. Neoprene is characterized by its toxic smell. Compounds that contain lead are used to prepare finished products made with neoprene, and these compounds can have a toxic effect on the kidneys, reproductive system, and blood. Furthermore, some neoprene adhesives contain 4% rosin, which is a skin contact sensitizer.

Nitrocresolic herbicides

Nitrocresolic herbicides are highly toxic chemicals that are used in agriculture. Exposure to nitrocresolic herbicides can lead to hyperthermia, headache, dehydration, malaise, and restlessness. In severe cases, exposure to these chemicals may lead to seizures, coma, and cerebral edema.

Nitrogen dioxide

Nitrogen dioxide is a toxic gas that produces ground-level ozone, which is found in smog. A large percentage of nitrogen dioxide in the air comes from transportation. Millions of tons of the gas are produced each year. Effects of nitrogen dioxide exposure include lung irritation and lowered resistance to respiratory infection.

Nitrous oxide

Nitrous oxide, also known as laughing gas, is an oxide of nitrogen. At room temperature, the gas is colorless and has a sweet taste and odor. Nitrous oxide is commonly used in surgery and dentistry as an anesthetic and analgesic. It is also used as an aerosol propellant and oxidizer in rocket motors. Short-term effects of nitrous oxide exposure include decreases in mental performance, manual dexterity, and audiovisual ability. The long-term effects of nitrous oxide exposure include numbness, vitamin B12 deficiency, and reproductive problems.