MSDS

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CAS #: This is the Chemical Abstract Service Number that uniquely identifies each compound.
ACGIH - American Conference of Governmental
Industrial Hygienists, a professional association which
establishes exposure limits.
TLV - Threshold Limit Value - an airborne concentration
of a substance that represents conditions under which it is
generally believed that nearly all workers can 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 (C). Skin
absorption 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 OSHA Permissible Exposure
Limits are based in the 1989 PELs and the June, 1993 Air
Contaminants Rule (Federal Register
: 58: 35338-35351
and 58: 40191). Both the current PELs and the vacated
PELs are indicated. The phrase, “Vacated 1989 PEL,” is
placed next to the PEL that was vacated by Court Order.
IDLH - Immediately Dangerous to Life and Health - This
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.
HAZARD RATINGS:
HAZARDOUS MATERIALS IDENTIFICATION SYSTEM:
Health Hazard
: 0 (minimal acute or chronic exposure
hazard); 1 (slight acute or chronic exposure hazard); 2
(moderate acute or significant chronic exposure hazard);
3 (severe acute exposure hazard; onetime overexposure
can cause permanent injury and can be fatal); 4 (extreme
acute exposure hazard; onetime overexposure can be
fatal). Flammability Hazard
: 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: 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).
NATIONAL FIRE PROTECTION ASSOCIATION: Health
Hazard: 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 and Reactivity Hazard
: Refer to
definitions for “Hazardous Materials Identification
System”.FLAMMABILITY LIMITS IN AIR:
Much of the information related to fire and explosion is
derived from the National Fire Protection Association
(NFPA). Flash Point
- Minimum temperature at which a
liquid gives off sufficient vapors to form an ignitable
mixture with air. Autoignition Temperature
: The minimum
temperature required to initiate combustion in air with no
other source of ignition. 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.
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: LD
50
- Lethal Dose (solids &
liquids) which kills 50% of the exposed animals; LC
50
-
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/m
3
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. Other measures of toxicity include TDLo, the lowest
dose to cause a symptom and TCLo the lowest
concentration to cause a symptom; TDo, LDLo, LDo, TC,
TCo, LCLo, and LCo, the lowest dose (or concentration)
to cause lethal or toxic effects. BEI - Biological Exposure
Indices, represent the levels of determinants which are
most likely to be observed in specimens collected from a
healthy worker who has been exposed to chemicals to the
same extent as a worker with inhalation exposure to the
TLV. Ecological Information: EC is the effect
concentration in water.
Data from several sources are used to evaluate the
cancer-causing potential of the material. The sources and
ratings are: IARC - the International Agency for Research
on Cancer; 1 = Carcinogenic to humans, 2A, 2B =
Probably carcinogenic to humans, 3 = Unclassifiable as to
carcinogenicity in humans, and 4 = Probably not
carcinogenic to humans. NTP - the National Toxicology
Program; K =Known to be a human carcinogen, and R =
Reasonably anticipated to be a human carcinogen.
RTECS - the Registry of Toxic Effects of Chemical
Substances. OSHA - Occupational Safety and Health
Administration and CAL/OSHA - California’s subunit of
the Occupational Safety and Health Administration; Ca =
Carcinogen defined with no further categorization.
ACGIH – American Conference of Governmental
Industrial Hygienists; A1 = Confirmed human carcinogen,
A2 = Suspected human carcinogen, A3 = Confirmed