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Bismuth Telluride, Undoped (Respirable Fraction)

General Description

  • Synonyms: Bi2Te3
  • OSHA IMIS Code Number: B110
  • Chemical Abstracts Service (CAS) Registry Number: 1304-82-1
  • Chemical Description and Physical Properties:
    • solid

Exposure Limits

  • National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 5 mg/m3 TWA

Health Factors

  • Health Effects: Accumulation in lungs (HE10)

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • Tared Low Ash Polyvinyl Chloride (LAPVC) filter 5 microns preceded by 10 mm Nylon Cyclone
  • maximum volume: 816 Liters
  • minimum volume: 408 Liters
  • maximum flow rate: 1.7 L/min
  • current analytical method: Gravimetric Analysis
  • method reference: 11, 12
  • sampling and analytical error: 0.10
  • method classification: Fully Validated
  • note: Field method. If the gross weight of the sample yields a concentration below the standard for the air contaminate, do not submit sample to the Salt Lake Technical Center (SLTC) for analysis. If the filter is not overloaded, samples may be collected up to an 8-hour period.
  • alternate analytical method: Atomic Absorption Spectroscopy; AAS
  • method reference: 2 (OSHA ID-121)
  • method classification: Not Validated
  • note: Submit as a separate sample. An elemental analysis for Tellurium or Bismuth is performed and reported as the compound.

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