CAS #: This is the
Chemical Abstract Service Number which uniquely identifies each
constituent. It is used for computer- related searching.
EXPOSURE LIMITS IN AIR:
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. The duration must be considered, including the 8-hour
Time Weighted Average (TWA), the 15-minute
Short Term Exposure Limit, and the instantaneous
Ceiling Level. Skin adsorption effects must also be considered.
OSHA - U.S. Occupational Safety and Health
Administration.
PEL - Permissible Exposure
Limit - this exposure value means exactly the same as a
TLV, except that it is enforceable by OSHA. The IDLH
- Immediately Dangerous to Life and Health level
represents a concentration from which one can escape within
30-minutes without suffering escape-preventing or permanent
injury. The DFG - MAK is the Republic of
Germany's Maximum Exposure Level, similar to the U.S. PEL.
NIOSH is the National Institute of Occupational
Safety and Health, which is the research arm of the U.S.
Occupational Safety and
Health Administration
(OSHA). NIOSH issues exposure guidelines called
Recommended Exposure
Levels (RELs). When no exposure
guidelines are established, an entry of NE is
made for reference.
FLAMMABILITY LIMITS IN
AIR: Much of the information related to fire and
explosion is derived from the National
Fire Protection
Association (NFPA). LEL -
the lowest percent of vapor in air, by volume, that will explode
or ignite in the presence of an ignition source. UEL - the
highest percent of vapor in air, by volume, that will explode or
ignite in the presence of an ignition source.
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TOXICOLOGICAL
INFORMATION: 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 used in
this section are: 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, administered to a test subject, based on
their body weight in kg. Data from several sources are used to
evaluate the cancer-causing potential of the material. The sources
are: IARC - the International
Agency for Research on Cancer;
NTP - the National Toxicology
Program, RTECS - the Registry of
Toxic Effects of Chemical Substances,
OSHA and CAL/OSHA. IARC and NTP
rate chemicals on a scale of decreasing potential to cause human
cancer with rankings from 1 to 4. Subrankings (2A, 2B, etc.) are
also used. Other measures of toxicity include
TDLo, the lowest dose to cause a symptom;
TDo, LDLo, and
LDo, the lowest dose to cause death.
REGULATORY INFORMATION
This section
explains the impact of various laws and regulations on the
material. EPA is the U.S. Environmental
Protection Agency. WHMIS is the Canadian
Workplace Hazard information System. DOT and
CTC are the U.S. Department of Transportation and
the Canadian Transportation Commission, respectively. These are:
Superfund Amendments and
Reauthorization Act
(SARA); the Toxic Substance
Control Act (TSCA); Marine
Pollutant status according to the DOT; California's Safe Drinking
Water Act (Proposition 65); the
Comprehensive Environmental Response,
Compensation, and Liability Act
(CERCLA or Superfund); and
various state regulations. This section also includes information
on the precautionary warnings which appear on the materials
package label.
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