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Nitrous Oxide (N2O) U.S.P.
Cylinder Color: Blue
N2O- This colorless anesthetic gas, with a slightly sweetish odor and taste, is about 1and one half times as heavy as air. Nitrous oxide is nonflammable, but it is an oxidizer and will support combustion of flammable materials. Nitrous oxide is not life-supporting and can act as a simple asphyxiant by displacing air. Nitrous oxide is shipped as a liquefied high-pressure gas at its vapor pressure of 745 psig (54.2 kg/cm2) at 70° F (21° C).
Major Hazards: Vigorously Supports Combustion and Can Cause Rapid Suffocation
Exposure Limit: TLV: TWA of 50 ppm (ACGIH 1995-96)
Fire Potential: Oxidizer & Decomposition
Odor: Sweet
Mol. Wt.: 44.013
Sp. Gr. (Air = 1) 70° F (21° C): 1.53
Critical Temperature: 97.6° F (37° C)
Critical Pressure: 1053 psia (74.0 kg/cm2abs)
Specific Volume: 8.8 ft3/lb at 70° F (0.54 m3/kg at 15° C)
CAS Registry No.: 10024-97-2
D.O.T. Description: Nitrous Oxide, Compressed, 2.2, UN1070
Nitrous Oxide, Refrigerated Liquid, 2.2, UN2201
Medical Applications: As an analgesic, often in combination with other agents for anesthesia. Also used in cryosurgery.
CAUTION: Nitrous oxide has anesthetic properties at high concentration and can induce hysteria, dizziness, unconsciousness and death. Some epidemiological studies suggest that long term exposure may have certain health hazards, including neurological and reproductive effects. The National Institute of Occupational Safety and Health (NIOSH) has recommended a worker exposure limit TWA of 25 ppm during anesthetic and analgesic administration.
| Valve Connection | Cylinder Size | Contents | Pressure PSIG @70°F | Nominal Gross Wt. | CGA 326
(Threaded) | 200 | 64lb 29.0kg | 745psig 52.4kg/cm2 | 198lb 89.8kg | CGA 326
(Threaded) | 190 | 56lb 25.4kg | 745psig 52.4kg/cm2 | 190lb 86.2kg | CGA 326
(Threaded) | 180LT | 389lb 176kg3 | 350psig 2,143kPA | 673lb 460kg | CGA 910
(Pin-Indexed) | ME | 6lb 7 oz2.92kg | 745psig 52.4kg/cm2 | 21lb 9.52kg | CGA 910
(Pin-Indexed) | MD | 3lb 13¼oz1.74kg3 | 745psig 52.4kg/cm2 | 13.4lb 6.08kg |
Purity Specifications
U.S.P. 99.0% N2O, min.
CO <10 ppm
C02 <300 ppm
NO <1 ppm
N02 <1 ppm
NH3 <25 ppm
Halogens <1 ppm
H20 <200 ppm
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