CAS #: The Chemical Abstract Service Number which uniquely identifies each constituent.

ACGIH - American Conference of Governmental Industrial Hygienists, a professional association which establishes exposure limits.

TLV - Threshold Limit Value - an airborne concentration of a substance which represents conditions under which it is generally believed that nearly all workers may be repeatedly exposed without adverse effect.

OSHA - U.S. Occupational Safety and Health Administration.

PEL - Permissible Exposure Limit - The same value as a TLV, except it is enforceable by OSHA.

IDLH - Immediately Dangerous to Life and Health - A concentration from which one can escape within 30-minutes without suffering permanent injury.

NATIONAL FIRE PROTECTION ASSOCIATION:
Health Hazard Rating Scale (Blue):
0 (material that on exposure under fire conditions would offer no hazard beyond that of ordinary combustible materials);
1 (materials that on exposure under fire conditions could cause irritation or minor residual injury);
2 (materials that on intense or continued exposure under fire conditions could cause temporary incapacitation or possible residual injury);
3 (materials that can on short exposure could cause serious temporary or residual injury);
4 (materials that under very short exposure could cause death or major residual injury). Flammability Hazard Rating Scale (Red):
0 (minimal hazard);
1 (materials that require substantial pre-heating before burning);
2 (combustible liquid or solids; liquids with a flash point of 38-93°C [100-200°F]);
3 (Class IB and IC flammable liquids with flash points below 38°C [100°F]);
4 (Class IA flammable liquids with flash points below 23°C [73°F] and boiling points below 38°C [100°F].
Reactivity Hazard Rating Scale(Yellow):
0 (normally stable);
1 (material that can become unstable at elevated temperatures or which can react slightly with water);
2 (materials that are unstable but do not detonate or which can react violently with water);
3 (materials that can detonate when initiated or which can react explosively with water);
4 (materials that can detonate at normal temperatures or pressures).

Possible health hazards as derived from human data, animal studies, or from the results of studies with similar compounds are presented. Definitions of some terms:
LD50 -Lethal Dose (solids & liquids) which kills 50% of the exposed animals;
LC50 - Lethal Concentration (gases) which kills 50% of the exposed animals;
ppm concentration expressed in parts of material per million parts of air or water;
mg/m3 concentration expressed in weight of substance per volume of air;
mg/kg quantity of material, by weight.

EPA is the U.S. Environmental Protection Agency.

WHMIS is the Canadian Workplace Hazardous Materials Information System.