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Chemical Sampling Information (CSI)
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General Description

Synonyms: Triiodomethane

OSHA IMIS Code Number: 1517

Chemical Abstracts Service (CAS) Registry Number: 75-47-8

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: PB7000000; 48202

Chemical Description and Physical Properties:

molecular weight: 393.72
molecular formula: CHI3
melting point: 120°C

Exposure Limits

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.6 ppm, 10 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.6 ppm TWA

Health Factors

Health Effects: Irritation-Eye, Nose, Throat, Skin---Moderate (HE15) Acute CNS effects (HE4)

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Glass Fiber Filter (37 mm) in series with XAD-4 tube (100/50 mg sections)
    analytical solvent: (50:50) Carbon Disulfide/Benzene
    maximum volume: 10 Liters  
    maximum flow rate: 0.1 L/min
    current analytical method: Gas Chromatography; GC/ECD
    method reference: 2 (OSHA In-House File)
    method classification: Partially Validated

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