Acronyms and Abbreviations
GHS
Globally Harmonized System
HCN
Health Code Number
HHR
Health Hazard Rating
IDLH
Immediately Dangerous to Life or Health
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
LOC
Level of Concern
MAK
Maximale Arbeitsplatz-Konzentration (maximum workplace concentration) from the German Research Foundation
NFPA
National Fire Protection Association
OEL
Occupational Exposure Limit
REL
Recommended Exposure Limit
SDS
Safety Data Sheet
SG
Specific Gravity
STEL
Short-Term Exposure Limit
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
TWA
Time-Weighted Average