CARBON DIOXIDE†

Chemical Identification
Chemical Identification
CAS # 124-38-9
Formula

CO₂

Synonyms

carbonic acid gas; dry ice

Physical Properties
Physical Properties
Physical description Colorless, odorless gas.
Boiling point sublimes Molecular weight 44.0
Freezing point/melting point -109°F (sublimes) Vapor pressure 56.5 atm
Flash point Vapor density 1.53
Specific gravity 1.56 at -110.2°F Ionization potential 13.77 eV
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0530
Sampling group
Sampler/Sampling media Five layer aluminized gas sampling bag [Calibrated Instruments GSB-P/10]
Sampling time*
Sampling volume (TWA)*

2-5 L

Sampling flow rate (TWA)*

0.01-0.05 L/min

Sampling volume (STEL/Peak/C)*

2-5 L

Sampling flow rate (STEL/Peak/C)*

0.3 L/min

Analytical method instruments GC-TCD
Method reference OSHA ID-172 (fully validated)
Notes

Use detector tubes for screening. If greater than PEL, order gas sampling bags.

OSHA staff please call the SLTC prior to sampling (801) 233-4900. 

Special requirements

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
Bulk Method
Bulk Method
On-Site Screening Techniques
On-Site Screening Techniques
Device Detector tube Detector tube Detector tube Infrared spectrophotometer Infrared spectrophotometer CMS Chip
Model/Type Gastec 2L Dräger - Carbon dioxide 0.1%/a CH23501 Matheson-Kitagawa 8014-126SA Miran 1A & 1B Miran 103 Carbon dioxide, 1-20 Vol% range; Carbon dioxide, 1000-25000 ppm range; Carbon dioxide, 200-3000 ppm range
Sampling information
(see manufacturer instructions)
0.13-6.0% vol 0.5 - 6.0% vol 0.1-2.6% vol 0.4 ppm at 4.3 µm 2%@4.45 µm
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA

5000 ppm (9000 mg/m³)

REL-TWA

5000 ppm (9000 mg/m³)

TLV-TWA

5000 ppm [1983]

PEL-TWA

5000 ppm (9000 mg/m³)

PEL-STEL REL-STEL

30,000 ppm (54,000 mg/m³)

TLV-STEL

30,000 ppm [1983]

PEL-STEL

30,000 ppm (54,000 mg/m³)

PEL-C REL-C TLV-C PEL-C
Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

See 29 CFR 1910.1000 Table Z-1.

Notes: Notes: Notes:

See Section 5198.

Health factors:  See NIH-NLM PubChem. IDLH

40,000 ppm

Carcinogenic classifications: Not listed Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Carbon dioxide

NIOSH: Pocket Guide to Chemical Hazards - Carbon dioxide

Literature References

  • Grant WM. Toxicology of the Eye. 3rd ed. Springfield, IL: Charles C. Thomas Publisher, p. 179, 1986.
  • Halpern P, Raskin Y, Sorkine P, Oganezov A. Exposure to extremely high concentrations of carbon dioxide - a clinical description of a mass casualty incident. Ann Emerg Med. 43(2):196-9; Feb 2004.

Last Updated Date : 12/21/2020