2,3-DIMETHYLBUTANE
| CAS # | 79-29-8 |
|---|---|
| Formula |
C₆H₁₄ |
| Synonyms |
diethylmethylmethane; diisopropyl; 2,2-dimethylbutane; 2,3-dimethylbutane; isohexane; 2-methylpentane; 3-methylpentane |
| Physical description | Clear liquids with mild, gasoline-like odors. | ||
|---|---|---|---|
| Boiling point | 136.4°F | Molecular weight | 86.18 |
| Freezing point/melting point | -199.3°F | Vapor pressure | 200 mmHg at 70°F |
| Flash point | -20°F | Vapor density | 3 |
| Specific gravity | 0.6616 | Ionization potential | |
| Lower explosive limit (LEL) | 1.2% | Upper explosive limit (UEL) | 7% |
| NFPA health rating | 1 | NFPA fire rating | 3 |
| NFPA reactivity rating | 0 | NFPA special instruction | |
| Vapor hazard ratio (VHR) | |||
| Historical exceedance percentage | |||
| Target organs | |||
| Analyte code (IMIS no.) | |||
|---|---|---|---|
| Sampling group | |||
| Sampler/Sampling media | |||
| Sampling time* | |||
| Sampling volume (TWA)* | |||
| Sampling flow rate (TWA)* | |||
| Sampling volume (STEL/Peak/C)* | |||
| Sampling flow rate (STEL/Peak/C)* | |||
| Analytical method instruments | |||
| Method reference | |||
| Notes | |||
| Special requirements |
* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.
| Wipe Sampler/Sampling media |
|
|---|---|
| Bulk Method |
|
| Device | |||||
|---|---|---|---|---|---|
| Model/Type | |||||
|
Sampling information (see manufacturer instructions) |
|
OSHA PEL
8-hour TWA (ST) STEL (C) Ceiling Peak |
NIOSH REL
Up to 10-hour TWA (ST) STEL (C) Ceiling |
ACGIH TLV©
8-hour TWA (ST) STEL (C) Ceiling |
|||||
|---|---|---|---|---|---|---|---|
| PEL-TWA |
|
REL-TWA |
100 ppm (350 mg/m³) |
TLV-TWA |
500 ppm [1979] |
PEL-TWA |
500 ppm (1800 mg/m³) |
| PEL-STEL |
|
REL-STEL |
|
TLV-STEL |
1000 ppm [1979] |
PEL-STEL |
1000 ppm (3600 mg/m³) |
| PEL-C |
|
REL-C |
510 ppm (1800 mg/m³) [15 minutes] |
TLV-C |
|
PEL-C |
|
| Skin notation |
NA |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
|
Notes:
Not established |
Notes:
|
Notes:
|
Notes:
as Hexane, other isomers |
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| Health factors: See NIH-NLM PubChem. | IDLH | ||||||
| Carcinogenic classifications: |
Notes:
|
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|
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
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Additional Resources and Literature References
|
NOAA: CAMEO Chemicals - 2,3-Dimethylbutane NIOSH: Pocket Guide to Chemical Hazards - Hexane isomers (excluding n-Hexane) Literature References
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Last Updated Date : 12/15/2020