4-Dimethylaminoazobenzene
Synonyms & Trade Names
Butter yellow, DAB, p-Dimethylaminoazobenzene, N,N-Dimethyl-4-aminoazobenzene, Methyl yellow
Exposure Limits
Measurement 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
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
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 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
See also
Page last reviewed: October 30, 2019
Content
source: National Institute for Occupational Safety and Health