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4-Dimethylaminoazobenzene

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Synonyms & Trade Names
Butter yellow, DAB, p-Dimethylaminoazobenzene, N,N-Dimethyl-4-aminoazobenzene, Methyl yellow
CAS No.
60-11-7
RTECS No.
BX7350000
DOT ID & Guide
Formula
C₆H₅NNC₆H₄N(CH₃)₂
Conversion
IDLH
Ca [N.D.]
See: IDLH INDEX
Exposure Limits
NIOSH REL
Ca See Appendix A
OSHA PEL
[1910.1015] See Appendix B
Measurement Methods
NIOSH P&CAM284 (II-4)
See: NMAM or OSHA Methods
Physical Description
Yellow, leaf-shaped crystals.
Molecular Weight
225.3
Boiling Point
Sublimes
Melting Point
237°F
Solubility
0.001%
Vapor Pressure
0.0000003 mmHg (est.)
Ionization Potential
?
Specific Gravity
?
Flash Point
?
Upper Explosive Limit
?
Lower Explosive Limit
?
Incompatibilities & Reactivities
None reported
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
Enlarged liver; liver, kidney disturbance; contact dermatitis; cough, wheezing, dyspnea (breathing difficulty); bloody sputum; bronchial secretions; frequent urination, hematuria (blood in the urine), dysuria; [potential occupational carcinogen]
Target Organs
Skin, respiratory system, liver, kidneys, bladder
Cancer Site
[in animals: liver & bladder tumors]
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: 1498   MEDICAL TESTS: 0081
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health