NIOSH logo and tagline

beta-Naphthylamine

Related Pages
Synonyms & Trade Names
2-Aminonaphthalene, 2-Naphthylamine
CAS No.
91-59-8
RTECS No.
QM2100000
DOT ID & Guide
1650 153
Formula
C₁₀H₇NH₂
Conversion
IDLH
Ca [N.D.]
See: IDLH INDEX
Exposure Limits
NIOSH REL
Ca See Appendix A
OSHA PEL
[1910.1009] See Appendix B
Measurement Methods
NIOSH 5518;
OSHA 93
See: NMAM or OSHA Methods
Physical Description
Odorless, white to red crystals with a faint, aromatic odor. [Note: Darkens in air to a reddish-purple color.]
Molecular Weight
143.2
Boiling Point
583°F
Melting Point
232°F
Solubility
Miscible in hot water
Vapor Pressure
(226°F): 1 mmHg
Ionization Potential
9.71 eV
Specific Gravity
(208°F): 1.06
Flash Point
315°F
Upper Explosive Limit
?
Lower Explosive Limit
?
Combustible Solid
Incompatibilities & Reactivities
None reported
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]
Personal Protection/Sanitation
(See protection codes)
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

See also
INTRODUCTION   ICSC CARD: 0610   MEDICAL TESTS: 0154
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health