NIOSH Pocket Guide to Chemical Hazards

beta-Naphthylamine CAS 91-59-8
C10H7NH2 RTECS QM2100000
Synonyms & Trade Names
2-Aminonaphthalene, 2-Naphthylamine
DOT ID & Guide
1650 153
NIOSH REL: Ca See Appendix A
OSHA PEL: [1910.1009] See Appendix B
IDLH Ca [N.D.] Conversion
Physical Description
Odorless, white to red crystals with a faint, aromatic odor. [Note: Darkens in air to a reddish-purple color.]
MW: 143.2
BP: 583°F
MLT: 232°F
Sol: Miscible in hot water
VP(226°F): 1 mmHg
IP: 9.71 eV

Sp.Gr(208°F): 1.06
Fl.P: 315°F
UEL: ?
LEL: ?

Combustible Solid
Incompatibilities & Reactivities
None reported
Measurement Methods
NIOSH 5518; OSHA 93
Personal Protection & Sanitation
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations NIOSH
At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration: (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 with a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Dermatitis; hemorrhagic cystitis; dyspnea (breathing difficulty); ataxia; methemoglobinemia, hematuria (blood in the urine); dysuria; [potential occupational carcinogen]
Target Organs Bladder, skin

Cancer Site [bladder cancer]