Nitrous oxide |
Synonyms & Trade Names Dinitrogen monoxide, Hyponitrous acid anhydride, Laughing gas |
CAS No. 10024-97-2 |
RTECS No. QX1350000 |
DOT ID & Guide 1070 122
2201 122 (refrigerated liquid) |
FormulaN2O |
Conversion 1 ppm = 1.80 mg/m3 |
IDLH N.D.
See: IDLH INDEX |
Exposure Limits NIOSH REL*: TWA 25 ppm (46 mg/m3) (TWA over the time exposed) [*Note: REL for exposure to waste anesthetic gas.]
OSHA PEL: none |
Measurement Methods
NIOSH 3800 , 6600;
OSHA ID166
See: NMAM or OSHA Methods |
Physical Description Colorless gas with a slightly sweet odor. [inhalation anesthetic] [Note: Shipped as a liquefied compressed gas.] |
MW: 44.0 |
BP: -127°F |
FRZ: -132°F |
Sol(77°F): 0.1% |
VP: 51.3 atm |
IP: 12.89 eV |
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Fl.P: NA |
UEL: NA |
LEL: NA |
RGasD: 1.53 |
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| Nonflammable Gas, but supports combustion at elevated temperatures. |
Incompatibilities & Reactivities Aluminum, boron, hydrazine, lithium hydride, phosphine, sodium |
Exposure Routes inhalation, skin and/or eye contact (liquid) |
Symptoms dyspnea (breathing difficulty); drowsiness, headache; asphyxia; reproductive effects; liquid: frostbite |
Target Organs respiratory system, central nervous system, reproductive system |
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Personal Protection/Sanitation (See protection codes)
Skin: Frostbite
Eyes: Frostbite
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation
Provide: Frostbite wash |
First Aid (See procedures)
Eye: Frostbite
Skin: Frostbite
Breathing: Fresh air
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Respirator Recommendations Not available.
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0067
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