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Malononitrile

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Synonyms & Trade Names
Cyanoacetonitrile, Dicyanomethane, Malonic dinitrile
CAS No.
109-77-3
RTECS No.
OO3150000
DOT ID & Guide
2647 153
Formula
NCCH₂CN
Conversion
1 ppm = 2.70 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
TWA 3 ppm (8 mg/m3)
OSHA PEL
none
Measurement Methods
NIOSH Nitriles Crit. Doc.
See: NMAM or OSHA Methods
Physical Description
White powder or colorless crystals. [Note: Melts above 90°F. Forms cyanide in the body.]
Molecular Weight
66.1
Boiling Point
426°F
Melting Point
90°F
Solubility
13%
Vapor Pressure
?
Ionization Potential
12.88 eV
Specific Gravity
1.19
Flash Point
(oc) 266°F
Upper Explosive Limit
?
Lower Explosive Limit
?
Combustible Solid
Incompatibilities & Reactivities
Strong bases [Note: May polymerize violently on prolonged heating at 265°F, or in contact with strong bases at lower temperatures.]
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, nose, throat; headache, dizziness, lassitude (weakness, exhaustion), confusion, convulsions; dyspnea (breathing difficulty); abdominal pain, nausea, vomiting
Target Organs
Eyes, skin, respiratory system, central nervous system, cardiovascular system
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:Daily
Provide:Eyewash, Quick drench
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Water wash immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
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

See also
INTRODUCTION   ICSC CARD: 1466
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health