Environmental Health and Safety

MSDS Glossary

Narcosis
A state of stupor, unconsciousness, or arrested activity produced by the influence of narcotics or other chemicals.
Nausea
Tendency to vomit, feeling of sickness at the stomach.
NFPA
National Fire Protection Association is an international membership organization which promotes and improves fire protection and prevention and establishes safeguards against loss of life and property by fire. Best known on the industrial scene for the National Fire Codes — 16 volumes of codes, standards, recommended practices and manuals developed and periodically updated by NFPA technical committees. Among these is NFPA 704M, the code for showing hazards of materials as they might be encountered under fire or related emergency conditions, using the familiar diamond-shaped label or placard with appropriate numbers or symbols.
Neurotoxin
A material that affects the nerve cells and may produce emotional or behavioral abnormalities.
Neutralize
In acid-base chemistry, the process of bringing the pH to between 5 and 8, either by adding an acid to a base or by adding a base to an acid.
NIOSH
National Institute for Occupational Safety and Health, U.S. Public Health Service, U.S. Department of Health and Human Services (DHHS), among other activities, tests and certifies respiratory protective devices and air sampling detector tubes, recommends occupational exposure limits for various substances, and assists OSHA and MSHA in occupational safety and health investigations and research.
Nonflammable
Not easily ignited, or if ignited, not burning rapidly.
Non-Sparking Tools
Tools made from beryllium-copper or aluminum-bronze that greatly reduce the possibility of igniting dusts, gases, or flammable vapors. Although these tools may emit some sparks when striking metal, the sparks have a low heat content and are not likely to ignite most flammable liquids.
NTP
National Toxicology Program. The NTP publishes an Annual Report on Carcinogens.

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