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Chemical Sampling Information (CSI)
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General Description

Synonyms: CO; Diesel Exhaust Component

OSHA IMIS Code Number: 0560

Chemical Abstracts Service (CAS) Registry Number: 630-08-0

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: FG3500000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1016 119; 9202 168 (cryogenic liquid)

NIOSH Pocket Guide to Chemical Hazards, Carbon Monoxide: chemical description, physical properties, potentially hazardous incompatibilities, and more


Exposure Limits

OSHA Permissible Exposure Limit (PEL):
General Industry: 29 CFR 1910.1000 Z-1 Table -- 50 ppm, 55 mg/m3 TWA

Construction Industry: 29 CFR 1926.55 Appendix A -- 50 ppm, 55 mg/m3 TWA

Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 50 ppm, 55 mg/m3 TWA
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 25 ppm, 29 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 35 ppm, 40 mg/m3 TWA; 200 ppm, 229 mg/m3 Ceiling


Health Factors

Potential Symptoms: Headaches; tachypnea; nausea; weakness, dizziness, confusion, halucinations; cyanosis; depressed, ST segment of electrocardiogram; angina; syncope

Health Effects: Asphyxiation, Chemical anoxia

Affected Organs: CVS, lungs, blood, CNS

Additional Information:

  • Occupational Health Guidelines for Chemical Hazards. US Department of Health and Human Services (DHHS), National Institute for Occupational Safety and Health (NIOSH) Publication No. 81-123, (1981, January). Provides a table of contents of guidelines for many hazardous chemicals. The files provide technical chemical information, including chemical and physical properties, health effects, exposure limits, and recommendations for medical monitoring, personal protective equipment (PPE), and control procedures.
Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • sampling media: Five Layer Aluminized Gas Sampling Bag (5 Liter)
    maximum volume: 5 Liters
    minimum volume: 2 Liters
    maximum flow rate: 0.05 L/Min (TWA)
    current analytical method: Gas Chromatography; GC/DID
    method reference: OSHA Analytical Method (OSHA ID-210)
    method classification: Fully Validated
    note: Call the Salt Lake Technical Center's Physical Measurements Team Leader for instructions.
On-Site Sampling Techniques/Methods:
  • device: Electrochemical sensor
    manufacturer: Drger
    model/type: Model 190 CO Datalogger
    sampling information: up to 8 hours
    upper measurement limit: 999 ppm
    detection limit: 4.1 ppm
    overall uncertainty: 9.6%
    method reference: OSHA On-site Air Method (OSHA ID-209)
Alternate Monitoring Method: Yes, see Carbon Monoxide (by COHb)

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