| A1 |
confirmed human carcinogen (ACGIH) |
| A2 |
suspected human carcinogen (ACGIH) |
| A3 |
animal carcinogen (ACGIH) |
| A4 |
not classifiable as a human carcinogen (ACGIH) |
| A5 |
not suspected as a human carcinogen (ACGIH) |
| ACGIH |
American Conference of Governmental Industrial Hygienists |
| AIHA |
American Industrial Hygiene Association |
| CAS |
Chemical Abstract Service |
| CF |
correction factor for LC data |
| CFR |
Code of Federal Regulations |
| EEGL |
emergency exposure guidance level (NRC) |
| ERPG |
emergency response planning guideline (AIHA) |
| IDLH |
immediately dangerous to life or health concentration value |
| i.p. |
intraperitoneal |
| i.v. |
intravenous |
| kg |
kilogram |
| LC |
lethal concentration |
| LC50 |
concentration causing death in 50% |
| LCLo |
lowest concentration causing death |
| LD |
lethal dose |
| LD50 |
dosage causing death in 50% |
| LDLo |
lowest dosage causing death |
| LEL |
lower explosive limit |
| mg/kg |
milligrams per kilogram of body weight |
| mg/m3 |
milligrams per cubic meter of air |
| mmHg |
millimeters of mercury (pressure measurement) |
| mppcf |
millions of particles per cubic foot of air |
| NIOSH |
National Institute for Occupational Safety and Health |
| NRC |
National Research Council |
| OSHA |
Occupational Safety and Health Administration |
| PEL |
permissible exposure limit (OSHA) |
| ppm |
parts per million parts of air |
| RD50 |
concentration producing a 50% decrease in respiratory rate following a 10-minute exposure |
| REL |
recommended exposure limit (NIOSH) |
| s.c. |
subcutaneous |
| SCP |
Standards Completion Program (NIOSH/OSHA) |
| SPEGL |
short-term public emergency guidance level (NRC) |
| STEL |
Short-term exposure limit |
| TCLo |
lowest concentration resulting in a toxic effect |
| TDLo |
lowest dose resulting in a toxic effect |
| TLV |
threshold limit value (ACGIH) |
| TWA |
time-weighted average |
