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Chemical Fact Sheet

Chemical Abstract Number (CAS #) 88744
CASRN 88-74-4
Synonyms2-Nitroaniline
Benzenamine, 2-nitro
o-Nitroaniline
Analytical Method EPA Method 8270
Molecular FormulaC6H6N2O2

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

Use CHEM INT FOR CI PIGMENT YELLOW 5, ORANGE 2, YELLOW 7, VAT RED 15, VAT ORANGE 7, CI PIGMENT ORANGE 43, VAT RED 14, DISPERSE YELLOW 10. SYNTHESIS OF PHOTOGRAPHIC ANTIFOGGING AGENT, ORTHO-PHENYLENEDIAMINE, COCCIDIOSTATS.
Consumption Patterns ESSENTIALLY 100% FOR DYE MANUFACTURE (1972)
Apparent Color YELLOW-ORANGE CRYSTALS FROM BOILING WATER ; PLATES OR NEEDLES ; Orange solid
Odor Musty
Boiling Point 284 DEG C (CALCULATED)
Melting Point 69-71 DEG C
Molecular Weight 138.14
Density 0.9015 AT 25 DEG C/4 DEG C
Sensitivity Data Dust: irritating to eyes, nose and throat; solid: irritating to skin & eyes
Environmental Impact 2-Nitroaniline may be released to the environment in waste effluents generated at sites of its commercial production or use as chemical intermediate in the synthesis of dyes and pigments. It may also occur as a microbial decomposition product of dinitrobenzene. If released to the atmosphere, 2-nitroaniline should degrade rapidly in the vapor-phase (estimated half-life of 11 hr) by reaction with photochemically produced hydroxyl radicals. If released to soil or water, covalent bonding to humic materials may be important. The covalent bonding process may represent a mechanism by which 2-nitroaniline may be converted to a latent form in the biosphere. If this covalent bonding does not occur, 2-nitroaniline should leach through soils and sorption to sediments in water should not be important. When existing in a dissolved state in the water column, 2-nitroaniline may be susceptible to significant degradation in sunlight via reaction with photochemically produced oxidants such as hydroxyl and peroxy radicals. Occupational exposure may occur primarily through dermal contact at sites of its commercial production and use as a chemical intermediate.
Environmental Fate TERRESTRIAL FATE: 2-Nitroaniline may undergo significant covalent bonding with humic materials in soil which would result in significant adsorption and a chemical conversion to a latent form. If this bonding does not occur, significant leaching may be possible. A number of biological screening studies have found 2-nitroaniline to be generally resistant to biodegradation. AQUATIC FATE: 2-Nitroaniline may undergo significant covalent bonding with humic materials in natural water which would result in significant adsorption and a chemical conversion to a latent form. If this bonding does not occur, sorption to suspended solids and sediments is not expected to be important. When existing in a dissolved state in the water column, 2-nitroaniline may be susceptible to significant degradation in sunlight via reaction with photochemically produced oxidants such as hydroxyl and peroxy radicals. A number of biological screening studies have found 2-nitroaniline to be generally resistant to biodegradation. Aquatic hydrolysis, volatilization and bioconcentration are not expected to be important. ATMOSPHERIC FATE: Based on a vapor pressure of 8.8X10-4 mm Hg at 25 deg C , 2-nitroaniline should exist primarily in the vapor-phase in the ambient atmosphere(2,SRC). 2-Nitroaniline is readily degraded in the vapor-phase via reaction with photochemically produced hydroxyl radicals; this reaction has an estimated half-life of 11 hr in an average ambient atmosphere.
Drinking Water Impact 0.001 mg/l o-Nitroaniline was found in water from the Labith River in the Netherlands. SURFACE WATER: 2-Nitroaniline was qualitatively detected in the River Waal at Brakel in the Netherlands during monitoring conducted between 1972-1974 . A 2-nitroaniline concn of 1 ppb was found in the Rhine River at Lobith, Netherlands in July 1979 . EFFL: An unspecified isomer of nitroaniline was qualitatively detected in wastewater effluents from publicly-owned treatment works in Danville and Sauget, IL .

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