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Nitromethane

Synonyms & Trade Names
Nitrocarbol
CAS No.
75-52-5
RTECS No.
PA9800000
DOT ID & Guide
1261 129
Formula
CH3NO2
Conversion
1 ppm = 2.50 mg/m3
IDLH
750 ppm
See: 75525
Exposure Limits
NIOSH REL
: See Appendix D
OSHA PEL
: TWA 100 ppm (250 mg/m3)
Measurement Methods

NIOSH 2527
See: NMAM or OSHA Methods
Physical Description
Colorless, oily liquid with a disagreeable odor.
MW:
61.0
BP:
214°F
FRZ:
-20°F
Sol:
10%
VP:
28 mmHg
IP:
11.08 eV
Sp.Gr:
1.14
Fl.P:
95°F
UEL:
?
LEL:
7.3%
Class IC Flammable Liquid: Fl.P. at or above 73°F and below 100°F.
Incompatibilities & Reactivities
Amines; strong acids, alkalis & oxidizers; hydrocarbons & other combustible materials; metallic oxides [Note: Slowly corrodes steel & copper when wet.]
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
dermatitis; in animals: irritation eyes, respiratory system; convulsions, narcosis; liver damage
Target Organs
Eyes, skin, central nervous system, liver
Personal Protection/Sanitation
(See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations

OSHA

Up to 750 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:
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0522
 

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