Carbon Dioxide -

Medical Gases
Carbon Dioxide
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Carbon Dioxide U.S.P.

Cylinder Color: Gray

C02 - A colorless, odorless, nonflammable, slightly acidic gas which is about 112 times as heavy as air. A carbon dioxide concentration of three percent (by volume) can cause impairment of performance during prolonged exposure.
A 7.6 percent concentration may cause an increase in heart rate and blood pressure. Dypsnea (labored breathing), headache, dizziness, and sweating may result if exposure is prolonged.Exposure to ten percent concentration will result in unconsciousness in less than one minute.Carbon dioxide is shipped as a liquefied compressed gas at its vapor pressure of 838 psig (58.91 kg/cm2) at 70° F (21° C).

Major Hazards: High Pressure and Inhalation

Exposure Limit: TLV: TWA of 5,000 ppm, STEL of 30,000 ppm. (ACGIH 1995-96)

Fire Potential: Nonflammable

Odor: None

Mol. Wt.: 44.01

Sp. Gr. (Air = 1) 70° F (21° C): 1.522

Critical Temperature: 87.8° F (31° C)

Critical Pressure: 1,071.6 psia (75.3 kg/cm2abs)

Specific Volume: 8.74 ft3/lb at 70° F (0.534 m3/kg at 15° C)

CAS Registry No.: 124-38-9

D.O.T. Description: Carbon Dioxide, 2.2, UN1013 Carbon Dioxide, Refrigerated Liquid, 2.2, UN2187

Medical Applications: For close-to-physiologic atmospheres for the operation of artificial organs; in cryosurgery; with insufflators during laparoscopic surgery; and as a component in a mixture of oxygen or air as a respiratory stimulant to promote deep breathing.

Valve ConnectionCylinder SizeContentsPressure PSIG @70°FNominal Gross Wt.
CGA 320 (Threaded)5656lb 25.4 kg838psig 58.91 kg/cm2156lb 70.8 kg
CGA 320 (Threaded)180LT402lb 182kg350psig 2,413kg/cm2686lb 311kg
CGA 940 (Pin-Indexed)ME6lb 7 oz2.92 kg838psig 58.91 kg/cm221lb 9.5kg
CGA 940 (Pin-Indexed)ED5lb 8oz 2.49kg838psig 58.91kg/cm217lb 8kg
CGA 940 (Pin-Indexed)MD3lb 14 oz1.76kg838psig 58.91kg/cm213lb 6kg

Purity Specifications
U.S.P. 99.0% C02 by volume, min. NO < 2.5 ppm
H2S < 1 ppm NH3 < 25 ppm
CO < 10 ppm S02 < 5 ppm
N02 < 2.5 ppm H20 < 200 ppm