|Chemical Abstract Number (CAS #)||
||EPA Method 8270 |
Link to the National Library of Medicine's Hazardous Substances
Database for more details
on this compound.
|Use|| FORMERLY USED IN THE MANUFACTURE OF RUBBER
CHEM INT FOR DYES (FORMER USE)
CHEM INT FOR RUBBER ANTIOXIDANTS (FORMER USE)
Used to produce 2-chloronaphthylamine
|Apparent Color|| COLORLESS CRYSTALS WHICH DARKEN IN AIR TO A REDDISH-PURPLE
|Odor|| Faint aromatic odor
|Boiling Point|| 306 DEG C, ALSO STATED AS 294 DEG C
|Melting Point|| 111-113 DEG C
|Molecular Weight|| 143.18
|Density|| 1.061 AT 98 DEG C/4 DEG C
|Odor Threshold Concentration|| Recognition: 1.4-1.9 mg/cu m
|Sensitivity Data|| B-Naphthylamine is mildly irritating to the skin and has produced contact dermatitis.
|Environmental Impact|| 2-Naphthylamine was released into wastewater principally from the dye and pigment
industry where it is used as a chemical intermediate, however it has not been produced or
consumed commercially in the US for many years. It is produced in the pyrolysis of
nitrogen-containing organic matter and may be emitted to the air in this process or disposed of in
the residue. Cigarette smoke contains 2-naphthylamine and may be its most ubiquitous source.
2-Naphthylamine will degrade rapidly in the atmosphere in a matter of hours to a day by a
combination of photolysis and oxidation by air and hydroxyl radicals. In water and soil it will
probably disappear fairly rapidly due to oxidation by free radicals, adsorption to humic materials,
catalytic oxidation by cations and photolysis although no experimental data for these reactions
could be found. Biodegradation may occur but only where well acclimated microorganisms exist.
It would not be expected to bioconcentrate in fish. Human exposure will be occupational as well
as exposure to emissions from sources where nitrogen-containing organic matter is pyrolyzed
such as cigarettes, coal furnaces, etc.