Malononitrile
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CAS
109-77-3
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NCCH2CN
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RTECS
OO3150000
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Synonyms & Trade Names
Cyanoacetonitrile, Dicyanomethane, Malonic dinitrile
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DOT ID & Guide
2647 / 153
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Exposure
Limits
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NIOSH REL: TWA 3 ppm (8 mg/m3)
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OSHA PEL: none
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IDLH
N.D.
See: IDLH INDEX
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Conversion
1 ppm = 2.70 mg/m3
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Physical Description
White powder or colorless crystals. [Note: Melts above 90°F. Forms cyanide in the body.]
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MW: 66.1
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BP: 426°F
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MLT: 90°F
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Sol: 13%
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VP: ?
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IP: 12.88 eV
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Sp.Gr: 1.19
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Fl.P(oc): 266°F
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UEL: ?
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LEL: ?
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Combustible Solid
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Incompatibilities & Reactivities
Strong bases [Note: May polymerize violently on prolonged heating at 265°F, or in contact with strong bases at lower temperatures.]
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Measurement Methods
NIOSH Nitriles Crit. Doc.
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH
Up to 80 mg/m3:
(APF = 10) Any supplied-air respirator
Up to 200 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
Up to 400 mg/m3:
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
Up to 667 mg/m3:
(APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
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 organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, skin, nose, throat; headache, dizziness, lassitude (weakness, exhaustion), confusion, convulsions; dyspnea (breathing difficulty); abdominal pain, nausea, vomiting
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Target Organs
Eyes, skin, respiratory system, central nervous system, cardiovascular system
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