NIOSH Pocket Guide to Chemical Hazards

Diphenylamine CAS 122-39-4
(C6H5)2NH RTECS JJ7800000
Synonyms & Trade Names
Anilinobenzene, DPA, Phenylaniline, N-Phenylaniline, N-Phenylbenzenamine [Note: The carcinogen 4-Aminodiphenyl may be present as an impurity in the commercial product.]
DOT ID & Guide
NIOSH REL: TWA 10 mg/m3
OSHA PEL†: none
IDLH N.D. Conversion
Physical Description
Colorless, tan, amber, or brown crystalline solid with a pleasant, floral odor. [fungicide]
MW: 169.2
BP: 576°F
MLT: 127°F
Sol: 0.03%
VP(227°F): 1 mmHg
IP: 7.40 eV

Sp.Gr: 1.16
Fl.P: 307°F
UEL: ?
LEL: ?

Combustible Solid; explosive if a cloud of dust is exposed to a source of ignition.
Incompatibilities & Reactivities
Oxidizers, hexachloromelamine, trichloromelamine
Measurement Methods
OSHA 22, 78
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 promptly
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 Irritation eyes, skin, mucous membrane; eczema; tachycardia, hypertension; cough, sneezing; methemoglobinemia; increased blood pressure, heart rate; proteinuria, hematuria (blood in the urine), bladder injury; in animals: teratogenic effects
Target Organs Eyes, skin, respiratory system, cardiovascular system, blood, bladder, reproductive system