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Chemical Sampling Information (CSI)
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General Description

Synonyms: Selenium hydride

OSHA IMIS Code Number: 1475

Chemical Abstracts Service (CAS) Registry Number: 7783-07-5

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: MX1050000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 2202 18

Chemical Description and Physical Properties:

colorless gas with a very offensive odor
molecular weight: 81
vapor pressure: >1 atm
boiling point: -42°F
melting point: -87°F

Incompatibilities: Oxidizers, acids, water, halogenated hydrocarbons

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 0.05 ppm, 0.2 mg/m3

Construction Industry: 0.05 ppm, 0.2 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

Potential Symptoms: Eye, nose, throat irritation; nausea, vomiting, diarrhea; metallic taste, garlic breath; dizziness; lassitude, fatigue; In animals: pneumonitis; liver damage

Health Effects: Acute lung damage (HE11) Cumulative CNS effects (HE7); Liver damage (HE3) Irritation-Eyes, Nose, Throat---Marked (HE14)

Affected Organs: Respiratory system, eyes

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Midget Fritted Glass Bubbler (MFGB) containing 10 mL Deionized Water
    maximum volume: 480 Liters
    minimum volume: 240 Liters
    maximum flow rate: 1.0 L/min
    current analytical method: Atomic Absorption Spectroscopy; AAS
    method reference: 2 (OSHA In-house file)
    method classification: Not Validated
    note: Analysis is performed for total Selenium. Proposed sampling and analytical method follows (OSHA ID-105)

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Detector Tube
    company: Kitagawa
    part #: 167S
    range: 1-600 ppm
    class: Mfg

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