2-HEXANONE (METHYL N-BUTYL KETONE; METHYL BUTYL KETONE)†
Chemical Identification | |
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CAS # | 591-78-6 |
Formula |
C₆H₁₂O |
Synonyms |
butyl methyl ketone; MBK; methyl butyl ketone; methyl n-butyl ketone |
Physical Properties | |||
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Physical description | Colorless liquid with an acetone-like odor. | ||
Boiling point | 262°F | Molecular weight | 100.2 |
Freezing point/melting point | -71°F | Vapor pressure | 11 mmHg |
Flash point | 73°F | Vapor density | 3.45 |
Specific gravity | 0.812 | Ionization potential | 9.34 eV |
Lower explosive limit (LEL) | 1.2% | Upper explosive limit (UEL) | 8% |
NFPA health rating | 2 | 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.) | 1690 | |||||
Sampling group | ||||||
Sampler/Sampling media | CSC tube (100/50 mg) [SKC 226-01] | |||||
Sampling time* | ||||||
Sampling volume (TWA)* | 20 L |
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Sampling flow rate (TWA)* | 0.2 L/min |
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Sampling volume (STEL/Peak/C)* | ||||||
Sampling flow rate (STEL/Peak/C)* | ||||||
Analytical method instruments | GC-FID | |||||
Method reference | OSHA PV2031 (partially validated) | |||||
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 Method | |
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Sampler/Sampling media |
Bulk Method |
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On-Site Screening Techniques | ||||||
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Device | ||||||
Model/Type | ||||||
Sampling information (see manufacturer instructions) |
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 |
100 ppm (410 mg/m³) |
REL-TWA |
1 ppm (4 mg/m³) |
TLV-TWA |
5 ppm [1995] |
PEL-TWA |
1 ppm (4 mg/m³) |
PEL-STEL | REL-STEL |
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TLV-STEL |
10 ppm [1995] |
PEL-STEL |
10 ppm (40 mg/m³) |
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PEL-C | REL-C |
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TLV-C |
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PEL-C |
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Skin notation |
N |
Skin notation |
N |
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 |
1600 ppm |
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Carcinogenic classifications: EPA-1 |
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 |
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NOAA: CAMEO Chemicals - Methyl butyl ketone NIOSH: Pocket Guide to Chemical Hazards - 2-Hexanone Literature References
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Last Updated Date : 01/28/2021