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n-Butyl Alcohol

General Description

  • Synonyms: n-Butanol; Butyl alcohol; 1-Butanol; Propylcarbinol; BA
  • OSHA IMIS Code Number: 0460
  • Chemical Abstracts Service (CAS) Registry Number: 71-36-3
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: EO1400000
  • Department of Transportation Regulation Number (49 CFR 172.101) and Emergency Response Guidebook: 1120 129
  • NIOSH Pocket Guide to Chemical Hazards - n-Butyl Alcohol: Physical description, chemical properties, potentially hazardous incompatibilities, and more

Exposure Limits

Exposure Limit Limit Values HE Codes Health Factors and Target Organs

OSHA Permissible Exposure Limit (PEL) - General Industry
See 29 CFR 1910.1000 Table Z-1

100 ppm
(300 mg/m3) TWA

HE15

Eye, skin, nose, and upper respiratory irritation

OSHA PEL - Construction Industry
See 29 CFR 1926.55 Appendix A

100 ppm
(300 mg/m3) TWA

HE15

Eye, skin, nose, and upper respiratory irritation

OSHA PEL - Shipyard Employment
See 29 CFR 1915.1000 Table Z-Shipyards

100 ppm
(300 mg/m3) TWA

HE15

Eye, skin, nose, and upper respiratory irritation

 National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL)

50 ppm
(150 mg/m3) Ceiling

Skin

HE4

Corneal inflammation, blurred vision

HE7

Headache, dizziness, drowsiness
Target organs: Brain, CNS

HE15

Eye, nose, and throat irritation; dermatitis

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV) (2002)

20 ppm
(61 mg/m3) TWA

HE15

Eye, skin, nose, and upper respiratory irritation

CAL/OSHA PEL

50 ppm
(150 mg/m3) Ceiling

Skin

 

 

  • National Toxicology Program (NTP) carcinogenic classification: Not listed
  • International Agency for Research on Cancer (IARC) carcinogenic classification: Not listed
  • U.S. Environmental Protection Agency (EPA) carcinogenic classification: Not classifiable as to human carcinogenicity
  • EPA Inhalation Reference Concentration (RfC): Not established
  • Agency for Toxic Substances and Disease Registry (ATSDR) Inhalation Minimal Risk Level (MRL): Not established
  • NIOSH Immediately Dangerous to Life or Health (IDLH) concentration: 1,400 ppm (10% LEL)
  • Notes on Other Potential Health Effects and Hazards
    1. At temperatures above 29°C, explosive vapor/air mixtures may be formed (NIOSH/IPCS 2005).
    2. While the systemic toxicity of n-butyl alcohol itself is low, it may potentiate the toxicity of other compounds, such as carbon tetrachloride, to become a hepatotoxin (ACGIH 2002).
  • Literature Basis
    • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - n-Butanol. 2002.
    • NIOSH: Occupational Safety and Health Guideline for n-Butyl Alcohol. 1992.
    • NIOSH/IPCS: International Chemical Safety Cards - 1-Butanol. April 19, 2005.
  • Date Last Revised: 9/6/2012

Monitoring Methods used by OSHA

Laboratory Sampling/Analytical Method:
  • Charcoal Tube (100/50 mg sections, 20/40 mesh)
  • maximum volume: 10 Liters
  • maximum flow rate: 0.2 L/min (TWA)
  • maximum volume: 5 Liters
  • maximum flow rate: 0.2 L/min (Ceiling)
  • current analytical method: Gas Chromatography; GC/FID
  • analytical solvent: (99:1) Carbon Disulfide/Isopropanol
  • alternative solvent: (99:1) Carbon Disulfide/Dimethylformamide
  • alternative solvent: (95:5) Methylene Chloride/Methanol
  • method reference: NIOSH Manual of Analytical Methods (NIOSH 1401 (PDF))
  • method classification: Fully Validated
On-Site Sampling Techniques/Methods:
  • Detector Tube
  • manufacturer: AUER/MSA
  • model/type: Ethanol-100, MSA P/N 804136, AUER P/N 5086-818
  • sampling information: follow manufacturer's instructions
  • upper measurement limit: 3900 ppm
  • detection limit: approximately 50 ppm
  • overall uncertainty: unknown
  • method reference: on-site air secondary (manufacturer)
  • Detector Tube
  • manufacturer: Dräger
  • model/type: Alcohol 25/a, order no. 81 01631
  • sampling information: 10 strokes
  • upper measurement limit: 5000 ppm
  • detection limit: approximately 50 ppm
  • overall uncertainty: approximately 41%
  • method reference: on-site air secondary (manufacturer)
  • Detector Tube
  • manufacturer: Gastec
  • model/type: 114
  • sampling information: 3 strokes
  • upper measurement limit: 150 ppm
  • detection limit: 1 ppm
  • overall uncertainty: 25% for 2.5 to 30 ppm, 16% for 30 to 150 ppm
  • method reference: on-site air secondary (manufacturer)
  • Detector Tube
  • manufacturer: Matheson-Kitagawa
  • model/type: 8014-189U
  • sampling information: 2 or 4 strokes
  • upper measurement limit: 300 ppm
  • detection limit: approximately 4 ppm
  • overall uncertainty: unknown
  • method reference: on-site air secondary (manufacturer)

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