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Chemical Sampling Information (CSI)
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General Description

OSHA IMIS Code Number: 2231

Chemical Abstracts Service (CAS) Registry Number: 7783-79-1

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: VS9450000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 2194 15

Chemical Description and Physical Properties:

colorless gas
molecular weight: 193
vapor pressure: >1 atm at 20°C
boiling point: -31°F
melting point: -38°F


Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 0.05 ppm, 0.4 mg/m3

Construction Industry: 0.05 ppm, 0.4 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.05 ppm, 0.16 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.05 ppm TWA

Health Factors

Carcinogenic Classification:

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

Potential Symptoms: In animals: respiratory irritation, pulmonary edema

Health Effects: Lung edema (HE11)

Affected Organs: None known in humans

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

Use MIRAN 1A & 1B or 103

  • note: PEL 0.05 ppm which is below the minimum detectable concentration of 0.07 ppm for the MIRAN. Therefore, the MIRAN is usable for screening purposes only.

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Instrumentation
    company: Infrared Spectrophotometer
    part #: MIRAN 1A & 1B
    range: 0.07 ppm @ 12.9 um
    class: Mfg

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