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Nitromethane

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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.
Molecular Weight
61.0
Boiling Point
214°F
Freezing Point
-20°F
Solubility
10%
Vapor Pressure
28 mmHg
Ionization Potential
11.08 eV
Specific Gravity
1.14
Flash Point
95°F
Upper Explosive Limit
?
Lower Explosive Limit
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   ICSC CARD: 0522
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health