SPECTRUM

Chemical Fact Sheet

Chemical Abstract Number (CAS #) 60117
CASRN 60-11-7
Synonymsp-Dimethylaminoazobenzene
Benzenamine, N,N-dimethyl-4-(phenylazo)-
C.I. Solvent Yellow 2
Analytical Method EPA Method 8270
Molecular FormulaC14H15N3

Link to the National Library of Medicine's Hazardous Substances
Database for more details on this compound.

Use FOR DETERMINATION OF FREE HYDROCHLORIC ACID IN GASTRIC JUICE; SPOT TEST IDENTIFICATION OF PEROXIDIZED FATS; PH INDICATOR (RED 2.9, YELLOW 4.0).
Consumption Patterns NOT USED COMMERCIALLY IN USA
Apparent Color YELLOW CRYSTALLINE LEAFLETS
Melting Point 114-117 DEG C
Molecular Weight 225.28
Environmental Impact Release of N,N-dimethyl-p-(phenylazo)aniline to the environment may occur as a result of its manufacture and use as a dye intermediate, in photosensitive polymers and reusable films, as an indicator in volumetric analysis, in tests for oxidized fat, and as a coloring agent. If it is released to soil it may bind to the soil based on an estimated Koc of 7390 and therefore should not leach to the groundwater. However, since it has a pKa of 3.226 at 25 deg C, it exists partially as a cation and the extent of its adsorption to soils and sediments should be affected by the pH of the medium. It should not hydrolyze in soils. No information was found on its biodegradation in soils. If it is released to water it may bioconcentrate in aquatic organisms, adsorb to sediment, and may be subject to direct photolysis. It should not hydrolyze or evaporate from water. Based on a laboratory screening test using an inoculum from settled domestic wastewater, it may be subject to biodegradation. If it is released to the atmosphere, it may be subject to direct photolysis and the estimated vapor phase half-life in the atmosphere is 7.04 hr as a result of photochemically produced hydroxyl radicals adding to the aromatic rings; however, it may exist primarily adsorbed onto particulate matter due to its very low vapor pressure. Exposure may occur as a result of occupational dermal exposure.
Environmental Fate TERRESTRIAL FATE: If N,N-dimethyl-p(phenylazo)aniline is released to soil it may bind to the soil based on an estimated Koc of 7390 and therefore should not leach to the groundwater. However, since N,N-dimethyl-p-(phenylazo)aniline has a pKa of 3.226 at 25 deg C, it exists partially as a cation and the extent of its adsorption to soils and sediments should be affected by the pH of the medium. It should not hydrolyze in soils. No information was found on biodegradation in soils. AQUATIC FATE: If N,N-dimethyl-p-(phenylazo)aniline is released to water it may bioconcentrate in aquatic organisms, adsorb to sediment and may be subject to direct photolysis. It should not hydrolyze or evaporate from water. Based on a laboratory screening test using an inoculum from settled domestic wastewater, it may be subject to biodegradation. ATMOSPHERIC FATE: If N,N-dimethyl-p-(phenylazo)aniline is released to the atmosphere, it may be subject to direct photolysis and the estimated vapor phase half-life in the atmosphere is 7.04 hrs as a result of photochemically produced hydroxyl radicals adding to the aromatic rings; however, it may exist primarily adsorbed onto particulate matter due to its very low vapor pressure.

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