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Nitric oxide

Synonyms & Trade Names
Mononitrogen monoxide, Nitrogen monoxide
CAS No.
10102-43-9
RTECS No.
QX0525000
DOT ID & Guide
1660 124
Formula
NO
Conversion
1 ppm = 1.23 mg/m3
IDLH
100 ppm
See: 10102439
Exposure Limits
NIOSH REL
: TWA 25 ppm (30 mg/m3)
OSHA PEL
: TWA 25 ppm (30 mg/m3)
Measurement Methods

NIOSH 6014;
OSHA ID190
See: NMAM or OSHA Methods
Physical Description
Colorless gas. [Note: Shipped as a nonliquefied compressed gas.]
MW:
30.0
BP:
-241°F
FRZ:
-263°F
Sol:
5%
VP:
34.2 atm
IP:
9.27 eV
Fl.P:
NA
UEL:
NA
LEL:
NA
RGasD:
1.04
Nonflammable Gas, but will accelerate the burning of combustible materials.
Incompatibilities & Reactivities
Fluorine, combustible materials, ozone, NH3, chlorinated hydrocarbons, metals, carbon disulfide [Note: Reacts with water to form nitric acid. Rapidly converted in air to nitrogen dioxide.]
Exposure Routes
inhalation
Symptoms
irritation eyes, wet skin, nose, throat; drowsiness, unconsciousness; methemoglobinemia
Target Organs
Eyes, skin, respiratory system, blood, central nervous system
Personal Protection/Sanitation
(See protection codes)
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation
First Aid
(See procedures)


Breathing: Respiratory support
Respirator Recommendations

NIOSH/OSHA

Up to 100 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode*
(APF = 50) Any chemical cartridge respirator with a full facepiece and cartridge(s) providing protection against the compound of concern¿
(APF = 25) Any powered, air-purifying respirator with cartridge(s) providing protection against the compound of concern*¿
(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¿
(APF = 10) Any supplied-air respirator*
(APF = 50) Any self-contained breathing apparatus 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

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 1311   See MEDICAL TESTS: 0159
 

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