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Chemical Sampling Information (CSI)
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General Description

Synonyms: BHT; Butylated hydroxy toluene

OSHA IMIS Code Number: 2683

Chemical Abstracts Service (CAS) Registry Number: 128-37-0

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: GO7875000; 27354

Chemical Description and Physical Properties:

Solid.

Exposure Limits

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 10 mg/m3 TWA; Appendix A4 (Not Classifiable as a Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 10 mg/m3 TWA

Health Factors

International Agency for Research on Cancer (IARC): Group 3, not classifiable as to its carcinogenicity to humans

Health Effects: Explosives, Flammable (No adverse effects when Good Housekeeping + Pr (HE18)

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • sampling media: OSHA Versatile Sampler (OVS-7) - 13 mm XAD-7 tube (270/140 mg sections, 20/60 mesh) with Glass Fiber Filter enclosed
    analytical solvent: Methanol
    maximum volume: 100 Liters
    maximum flow rate: 1.0 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: 2 (OSHA In-House File)
    method classification: Partially Validated

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