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Chemical Sampling Information (CSI)
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General Description

Synonyms: Carbon Oxide Sulfide; Carbon Oxysulfide

OSHA IMIS Code Number: R220

Chemical Abstracts Service (CAS) Registry Number: 463-58-1

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: FG6400000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN2204; Poison Gas; Flammable Gas

Chemical Description and Physical Properties:

molecular weight: 60.07
boiling point: (-50.2)°C
molecular formula: COS


Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Graphatized Carbon Black
    maximum volume: 10 Liters
    maximum flow rate: 0.05 L/min
    analytical 1: Gas Chromatography; GC/FPD
    method reference: 2 (OSHA In-House File)
    method classification: Not Validated
    note: Article from J of Chromatography; V 99, pg 661-672

Article: Leiber, Mark A.; Berk, Howard C. "Analytical Chemistry", 1985, 57, 2792-96 ...Title: Determination of Carbonyl Sulfide in Air by Derivatization with 1,3-Diaminopropane and Capillary Gas Chromatographic Analysis ...Collection: Coated Resin but with pre-impinger of NaOH to remove CO2 which causes low results for COS. This is not convenient.

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