NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

beta-Naphthylamine

CAS
91-59-8

C10H7NH2

RTECS
QM2100000
Synonyms & Trade Names

2-Aminonaphthalene, 2-Naphthylamine
DOT ID & Guide
1650 / 153

Exposure
Limits

NIOSH REL: Ca See Appendix A
OSHA PEL: [1910.1009] See Appendix B
IDLH
Ca [N.D.] See: IDLH INDEX
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
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
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
(See Appendix E) 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 an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters./Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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]
See also: INTRODUCTION   See MEDICAL TESTS: 0154