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| Nitrogen dioxide | CAS 10102-44-0 | ||
| NO2 | RTECS QW9800000 | ||
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Synonyms & Trade Names Dinitrogen tetroxide (N2O4), Nitrogen peroxide |
DOT ID & Guide 1067 124 |
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Exposure Limits |
NIOSH REL: ST 1 ppm (1.8 mg/m3) | ||
| OSHA PEL�: C 5 ppm (9 mg/m3) | |||
| IDLH 20 ppm | Conversion 1 ppm = 1.88 mg/m3 | ||
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Physical Description Yellowish-brown liquid or reddish-brown gas (above 70°F) with a pungent, acrid odor. [Note: In solid form (below 15°F) it is found structurally as N2O4.] |
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MW: 46.0 |
BP: 70°F |
FRZ: 15°F |
Sol: Reacts |
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VP: 720 mmHg |
IP: 9.75 eV |
RGasD: 2.62 |
Sp.Gr: 1.44 (Liquid at 68°F) |
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Fl.P: NA |
UEL: NA |
LEL: NA |
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| Noncombustible Liquid/Gas, but will accelerate the burning of combustible materials. | |||
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Incompatibilities & Reactivities Combustible material, water, chlorinated hydrocarbons, carbon disulfide, ammonia [Note: Reacts with water to form nitric acid.] |
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Measurement Methods NIOSH 6014; OSHA ID182 |
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Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation Provide: Eyewash, Quick drench |
First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately |
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Respirator Recommendations
NIOSH Up to 20 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode�/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern�/Any appropriate escape-type, self-contained breathing apparatus |
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| Exposure Routes inhalation, ingestion, skin and/or eye contact | |
| Symptoms Irritation eyes, nose, throat; cough, mucoid frothy sputum, decreased pulmonary function, chronic bronchitis, dyspnea (breathing difficulty); chest pain; pulmonary edema, cyanosis, tachypnea, tachycardia | |
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Target Organs
Eyes, respiratory system, cardiovascular system |
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| See also: INTRODUCTION |