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Chemical Sampling Information (CSI)
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General Description

Synonyms: Benzene tetrahydride; 1,2,3,4-Tetrahydrobenzene

OSHA IMIS Code Number: 0840

Chemical Abstracts Service (CAS) Registry Number: 110-83-8

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: GW2500000; 28668

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN2256 Flammable Liquid

NIOSH Pocket Guide to Chemical Hazards, Cyclohexene: chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:

colorless liquid with a sweetish odor
molecular weight: 82
vapor pressure: 67 mm
boiling point: 181°F
melting point: -155°F

Incompatibilities: Strong oxidizers

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 300 ppm, 1015 mg/m3

Construction Industry: 300 ppm, 1015 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 300 ppm, 1010 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 300 ppm TWA

Health Factors

Potential Symptoms: Skin, eye, respiratory system irritation; drowsiness

Health Effects: Irritation-Eye, Nose, Throat, Skin---Moderate (HE15) Cumulative systemic toxicity (HE3); Narcosis (HE8)

Affected Organs: Skin, eyes, respiratory system

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Charcoal Tube (100/50 mg sections, 20/40 mesh)
    analytical solvent: Carbon Disulfide
    maximum volume: 5 Liters
    maximum flow rate: 0.2 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: 1 (NIOSH 1500 [128 KB PDF, 8 pages])
    sampling and analytical error: 0.12
    method classification: Partially Validated

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Detector Tube
    company: Gastec
    part #: 151
    range: 100-1000 ppm
    class: Mfg

  • device: Instrumentation
    company: Infrared Spectrophotometer
    part #: MIRAN 1A & 1B
    range: 4.4 ppm @ 8.8 um
    class: Mfg

  • device: Instrumentation
    company: Infrared Spectrophotometer
    part #: MIRAN 103
    range: 0-600 ppm @ 8.7 um
    class: Mfg

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