Acronyms and Abbreviations
ACGIH	American Conference of Governmental Industrial Hygienists
AEGL	Acute Exposure Guideline Level, developed by the EPA
AIHA	American Industrial Hygiene Association
atm	atmosphere
BEI	Biological Exposure Indices, published by ACGIH
BP	boiling point
C	ceiling limit; The concentration that should not be exceeded during any part of the working exposure (ACGIH).
°C	Celsius
CAMEO	Computer-Aided Management of Emergency Operations, maintained by NOAA
CAS	Chemical Abstracts Service
CASRN	Chemical Abstracts Service Registry Number
CHRIS	Chemical Hazards Response Information System, maintained by the U.S. Coast Guard
conc dep	concentration dependent
d	day
dec	decomposes
DOE	U.S. Department of Energy
DOT	U.S. Department of Transportation
EEGL	Emergency Exposure Guidance Level
EPA	U.S. Environmental Protection Agency
ERPG	Emergency Response Planning Guideline, published by AIHA
FP	freezing point
G	gas - state at 25°C
g	gram
GOEV	Guide to Occupational Exposure Values, published by ACGIH
HCN	Health Code Number
HC&P	Handbook of Chemistry and Physics
HSDB	Hazardous Substances Data Bank
HSS	U.S. Department of Energy Office of Health, Safety and Security
IDLH	immediately dangerous to life or health
I	inhalable fraction
insol	insoluble in water
IRIS	Integrated Risk Information System, maintained by the EPA
kg	kilogram
L	liquid - state at 25°C
LANL	Los Alamos National Laboratory
LC50	The concentration of a substance in air that kills 50% of the test population.
LCLo	The lowest concentration of a substance in air that has been shown to cause death in a test population.
LD50	The dose of a substance administered by any route (other than inhalation) that causes death to 50% of the test population.
LDLo	The lowest dose of a substance administered by any route (other than inhalation)that has been shown to cause death in a test population.
LEL	lower explosive limit
LLNL	Lawrence Livermore National Laboratory
LOC	Level of Concern, developed by EPA
LOEL	lowest-observed-effect-level
m3	cubic meter
mm Hg	pressure in millimeters of mercury
MAK	Maximale Arbeitsplatz-Konzentration (maximum workplace concentration) from the German Research Foundation
MF	molecular formula
mg	milligram
min	minute
MP	melting point
MSDS	Material Safety Data Sheet
MW	molecular weight
NFPA HHR	National Fire Protection Association - health hazard rating
NIOSH	National Institute for Occupational Safety and Health
NLM	National Library of Medicine
NOAA	National Oceanic and Atmospheric Administration
NPG	NIOSH Pocket Guide to Chemical Hazards
NTP	National Toxicology Program
OEL	occupational exposure limit
OEV	occupational exposure value
OHMTADS	Oil and Hazardous Materials Technical Assistance Data System
OSHA	Occupational Safety and Health Administration
PAC	Protective Action Criterion, published by DOE
PEL	Permissible Exposure Limit, promulgated by OSHA
PNOS	particulates not otherwise specified
ppm	parts per million
REL	< by published Limit, Exposure Recommended>
RTECS	Registry of Toxic Effects Chemical Substances
S	solid - state at 25°C
SAR	structure activity relationship
SAX	Lewis, R. J., Sr. (2005). Sax's Dangerous Properties of Industrial Materials (11th Edition). New York: John Wiley & Sons.
SAX Number	Each chemical's identifying code as used in Sax's Dangerous Properties of Industrial Chemicals (SAX)
SAX HR	Hazard rating used in Sax's Dangerous Properties of Industrial Chemicals (SAX)
SCAPA	DOE Subcommittee on Consequence Assessment and Protective Actions
SG	specific gravity
STEL	short-term exposure limit
sol	soluble in water
TCLo	The lowest concentration of a substance in air that has been shown to produce toxic effects in a test population.
TDLo	The lowest dose of a substance that has been shown to produce toxic effects in a test population.
TEEL	Temporary Emergency Exposure Limit
TLV	Threshold Limit Value, published by the ACGIH
TSCA	Toxic Substances Control Act
TWA	time-weighted average
UEL	upper explosive limit
unk	unknown
USCG	U.S. Coast Guard
VP	vapor pressure
WEEL	Workplace Environmental Exposure Level, published by AIHA