# NIOSH Pocket Guide to Chemical Hazards
m-Phthalodinitrile | CAS 626-17-5
C6H4(CN)2 | RTECS CZ1900000
Synonyms & Trade Names 1,3-Benzenedicarbonitrile; m-Dicyanobenzene; 1,3-Dicyanobenzene; Isophthalodinitrile; m-PDN | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 5 mg/m3
OSHA PEL†: none
IDLH N.D. | Conversion
Physical Description Needle-like, colorless to white, crystalline, flaky solid with an almond-like odor.
MW: 128.1 | BP: Sublimes | MLT: 324°F (Sublimes) | Sol: Slight
VP: 0.01 mmHg | IP: ? |  | Sp.Gr: 4.42
Fl.P: ? | UEL: ? | LEL: ? |
Combustible Solid and a severe explosion hazard.
Incompatibilities & Reactivities Strong oxidizers (e.g., chlorine, bromine, fluorine)
Measurement Methods None available
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: Daily Remove: When wet or contaminated Change: Daily | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Headache, nausea, confusion; in animals: irritation eyes, skin
Target Organs Eyes, skin, central nervous system
See also: INTRODUCTION