METHYL ALCOHOL (METHANOL)†
Chemical Identification | |
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CAS # | 67-56-1 |
Formula |
CH₄O |
Synonyms |
carbinol; columbian spirits; methanol; pyroligneous spirit; wood alcohol; wood naphtha; wood spirit |
Physical Properties | |||
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Physical description | Colorless liquid with a characteristic pungent odor. | ||
Boiling point | 147°F | Molecular weight | 32.1 |
Freezing point/melting point | -144°F | Vapor pressure | 96 mmHg |
Flash point | 52°F | Vapor density | 1.11 |
Specific gravity | 0.79 | Ionization potential | 10.84 eV |
Lower explosive limit (LEL) | 6.0% | Upper explosive limit (UEL) | 36% |
NFPA health rating | 1 | NFPA fire rating | 3 |
NFPA reactivity rating | 0 | NFPA special instruction | |
Vapor hazard ratio (VHR) | |||
Historical exceedance percentage | |||
Target organs |
Monitoring Methods Used by OSHA | ||||||
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Analyte code (IMIS no.) | 1660 | |||||
Sampling group | OVSG-2 | |||||
Sampler/Sampling media | 2 Anasorb 747 sampling tubes (6 mm glass tubes, the front tube contains 400 and the back 200 mg of sorbent) connected in series [SKC 226-82] | |||||
Sampling time* | 60 min |
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Sampling volume (TWA)* | 3 L (or 5 L when humidity is greater than 50%) |
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Sampling flow rate (TWA)* | 0.05 L/min |
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Sampling volume (STEL/Peak/C)* |
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Sampling flow rate (STEL/Peak/C)* |
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Analytical method instruments | GC-FID | |||||
Method reference | OSHA 5001 (fully validated) | |||||
Notes | Separate tubes and seal each after sampling. |
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Special requirements |
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* 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 Method | |
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Sampler/Sampling media |
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Bulk Method |
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On-Site Screening Techniques | ||||||
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Device | Detector tube | Detector tube | Detector tube | Detector tube | Detector tube | CMS Chip |
Model/Type | Gastec 111 | Gastec 111 | Gastec 111 | Matheson-Kitagawa 8014-119SA | Matheson-Kitagawa 8014-119U | Methanol, 20-500 ppm range |
Sampling information (see manufacturer instructions) |
0.5 to 4 strokes, 0.0004-4.5% range, uncertainty 25%; for 0.02-0.5%, 16% for 0.5-1.5% | 1 to 2 strokes, 5-1000 ppm range, uncertainty 25% for 40-200 ppm, 16% for 200-1000 ppm | 2 to 4 strokes, 0.2-56 ppm range, uncertainty 25% for 2-5 ppm, 16% for 5-20 ppm | 1 stroke, 0.05-6% range | 1 stroke, approx 20-1000 ppm range |
Exposure Limits | |||||||
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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 |
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PEL-TWA |
200 ppm (260 mg/m³) |
REL-TWA |
200 ppm (260 mg/m³) |
TLV-TWA |
200 ppm [2008] |
PEL-TWA |
200 ppm (260 mg/m³) |
PEL-STEL |
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REL-STEL |
250 ppm (325 mg/m³) |
TLV-STEL |
250 ppm [2008] |
PEL-STEL |
250 ppm (325 mg/m³) |
PEL-C |
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REL-C |
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TLV-C |
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PEL-C |
1000 ppm |
Skin notation |
N |
Skin notation |
Y |
Skin notation |
Y |
Skin notation |
Y |
Notes: |
Notes:
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Notes:
BEI® |
Notes:
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Health factors: See NIH-NLM PubChem. | IDLH |
6000 ppm |
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Carcinogenic classifications: Not listed |
Notes:
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AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
200 ppm/1000 ppm/5000 ppm |
Additional Resources and Literature References |
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NOAA: CAMEO Chemicals - Methanol NIOSH: Pocket Guide to Chemical Hazards - Methyl alcohol Literature References
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Last Updated Date : 01/05/2021