| Agent Name |
Pentaborane |
|---|
| CAS Number |
19624-22-7 |
|---|
| Formula |
B5-H9 |
|---|
| Major Category |
Toxic Gases & Vapors |
|---|
| Synonyms |
Pentaboron nonahydride; [NIOSH] |
|---|
| Category |
Hydrides |
|---|
| Description |
Colorless liquid with a pungent odor like sour milk; [NIOSH] |
|---|
| Sources/Uses |
Pentaborane has been used as a rocket fuel. [ACGIH] |
|---|
| Comments |
Workers accidentally exposed to pentaborane vapor experienced central nervous system effects at lower doses and tremors and seizures at higher doses. [ACGIH] A severe irritant of the eyes and respiratory tract; [ICSC] In one industrial accident with a fatality, patients had elevated liver enzymes and rhabdomyolysis. [HSDB] (Rhabdomyolysis is muscle tissue injury with release of myoglobin into the bloodstream and often kidney damage.) |
|---|
| Reference Link |
NIOSH: Occupational Health Guideline for Pentaborane |
|---|
| Exposure Assessment |
|---|
| Skin Designation (ACGIH) |
No |
|---|
| TIH |
Yes |
|---|
| TLV (ACGIH) |
0.005 ppm |
|---|
| STEL (ACGIH) |
0.01 ppm |
|---|
| PEL (OSHA) |
0.005 ppm |
|---|
| MAK |
0.005 ppm |
|---|
| IDLH (NIOSH) |
1 ppm |
|---|
| Excerpts from Documentation for IDLHs |
Human data: None relevant for use in determining the revised IDLH. |
|---|
| Vapor Pressure |
171 mm Hg |
|---|
| Odor Threshold Low |
0.97 ppm |
|---|
| Lethal Concentration |
LC50 (rats) = 6 ppm/4H |
|---|
| Explanatory Notes |
Odor threshold from AIHA; Flash point = 86 deg F; Pyrophoric (Ignites upon contact with air;) [CHEMINFO] |
|---|
| Flammability (NFPA) |
4: burns readily |
|---|
| Adverse Effects |
|---|
| Neurotoxin |
Other CNS Neurotoxin |
|---|
| Hepatotoxin |
Hepatotoxin, Secondary |
|---|
| Links to Other NLM Databases |
|---|
| Health Studies |
Human Health Effects from Hazardous Substances Data Bank: PENTABORANE
|
|---|
