BUTYL MERCAPTAN (BUTANETHIOL)†
| CAS # | 109-79-5 |
|---|---|
| Formula |
C₄H₁₀S |
| Synonyms |
butanethiol; 1-butanethiol; n-butanethiol; 1-mercaptobutane |
| Physical description | Colorless liquid with a strong, garlic-, cabbage-, or skunk-like odor. | ||
|---|---|---|---|
| Boiling point | 209°F | Molecular weight | 90.2 |
| Freezing point/melting point | 176.2°F | Vapor pressure | 35 mmHg |
| Flash point | 55°F | Vapor density | |
| Specific gravity | 0.83 | Ionization potential | 9.15 eV |
| Lower explosive limit (LEL) | Upper explosive limit (UEL) | ||
| 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.) | 0480 | ||
|---|---|---|---|
| Sampling group | |||
| Sampler/Sampling media | GFF (37 mm Gelman Type A) coated with mercuric acetate [SKC 225-9007] | ||
| Sampling time* | |||
| Sampling volume (TWA)* | 10-150 L |
||
| Sampling flow rate (TWA)* | 0.1-0.2 L/min |
||
| Sampling volume (STEL/Peak/C)* | |||
| Sampling flow rate (STEL/Peak/C)* | |||
| Analytical method instruments | GC-FPD | ||
| Method reference | NIOSH 2542 (partially validated) | ||
| Notes | Protect samples from light. |
||
| 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 |
10 ppm (35 mg/m³) |
REL-TWA | TLV-TWA | PEL-TWA |
0.5 ppm (1.5 mg/m³) |
||
| PEL-STEL | REL-STEL | TLV-STEL | PEL-STEL | ||||
| PEL-C | REL-C |
0.5 ppm (1.8 mg/m³) [15 minutes] |
TLV-C | PEL-C | |||
| Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
|
Notes:
See 29 CFR 1910.1000 Table Z-1. The Construction and Maritime Industries PEL is 0.5 ppm (1.5 mg/m³) for an 8 hr TWA. See 29 CFR 1926.55 Table 1 and 29 CFR 1915.1000 Table Z-Shipyards. |
Notes: |
Notes:
Visit the ACGIH TLV site for specific data |
Notes: | ||||
| Health factors: See NIH-NLM PubChem. | IDLH |
500 ppm |
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| Carcinogenic classifications: Not listed | Notes: | ||||||
| AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: | |||||||
Additional Resources and Literature References
|
NOAA: CAMEO Chemicals - Butyl mercaptan NIOSH: Pocket Guide to Chemical Hazards - n-Butyl mercaptan Literature References
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Last Updated Date : 04/05/2024