| Chemical |
2,4-diaminotoluene |
| CAS-number : |
95-80-7 |
| |
| Synonyms : |
| 4-methyl-1,3-benzenediamine |
| 4-methyl-m-phenylenediamine |
| 4-Methylphenylene-1,3-diamine |
| toluene-2,4-diamine |
| |
| Sumformula of the chemical : |
| C7H10N2 |
| EINECS-number : |
| 2024531 |
| |
| State and appearance : |
Colorless crystals.
Colorless to brown, needle shaped crystals
or powder (tends to darken on storage and exposure to air).
|
| |
| Vapor pressure, mmHg : |
| 0.0000552 |
est., HSDB 1999 |
| |
| Water solubility, mg/l : |
| 7740 |
est., HSDB 1999 |
| |
| Melting point, °C : |
| 99 |
MITI 1992 |
| |
| Boiling point, °C : |
| 280 |
MITI 1992 |
| |
| Volatilization : |
Based on estimated Henry's Law constant value, volitilization
is not expected to be a major environmental pathway for
toluene-2,4-diamine (HSDB 1999).
|
| |
| Mobility : |
Based on the estimated Koc (log Koc 1.56) value and the high
estimated water solubility of toluene-2,4-diamine, extensive
leaching and very little adsorption to soil or sediment is
expected (HSDB 1999).
|
| |
| Photochemical degradation in air : |
Photooxidation half-life in air:
2.7hr - 0.27hr, based upon estimated rate constant for reaction
with hydroxyl radicals in air (Howard 1991).
An atmospheric half-life of 7.99 hr has been estimated for the
reaction of toluene-2,4-diamine with hydroxyl radicals
(HSDB 1999).
Singlet oxygen, alkyl peroxyl radicals, alkoxy radicals and
hydroxy radicals are capable of oxidizing toluene-2,4-toluene
(HSDB 1999).
|
| |
| Photochemical degradation in water : |
Photooxidation half-life in water:
72d - 1.3d, scientific judgement based upon estimated half-life
for reaction of aromatic amines with hydroxyl radicals in
water.
It is assumed that 2,4-diaminotoluene reacts twice as
fast as aniline (Howard 1991).
|
| |
| Half-life in air, days : |
| 0.11 |
2.7hr - 0.27hr, |
| 0.01 |
based upon estimated photooxidation half-life in air. |
| |
Howard 1991 |
| |
| Half-life in soil, days : |
| 180 |
6mo - 4w, |
| 28 |
scientific judgement based upon estimated unacclimated aqueous aerobic biodegradation half-life. |
| |
Howard 1991 |
| |
| Half-life in water, days : |
| 72 |
72d - 1.3d, |
| 1.3 |
in surface water: based upon estimated photooxidation half-life in water, |
| 360 |
12mo - 8w, |
| 56 |
in ground water: scientific judgement based upon estimated unacclimated aqueous aerobic biodegradation half-life. |
| |
Howard 1991 |
| |
| Aerobic degradation in water : |
Aerobic half-life:
6mo - 4w, scientific judgement based upon unacclimated aerobic
aqueous screening test data which confirmed resistance to
biodegradation (Howard 1991).
|
| |
| Anaerobic degradation in water : |
Anaerobic half-life:
24mo - 8w, scientific judgement based upon estimated
unacclimated aerobic aqueous biodegradation half-life
(Howard 1991).
|
| |
| Total degradation in water : |
Biodegradation:
0% by BOD
substance: 100 mg/l
sludge: 30 mg/l
(MITI 1992)
|
| |
| Ready biodegradability : |
Confirmed to be non-biodegradable (Anon. 1987). |
| |
| Bioconcentration factor, fishes : |
| 5 |
< 5, 6w, Cyprinus carpio, conc 0.3 mg/l, |
| 50 |
< 50, 6w, Cyprinus carpio, conc 0.03 mg/l, |
| |
| Other information of bioaccumulation : |
Confirmed to be non-accumulative or low accumulative (Anon.
1987).
A bioconcentration factor of 91 was determined for an
unspecified isomer of diaminotoluene using fathead minnows
exposed for 32 days.
Using a log octanol/water partition
coefficient of 0.337 estimated specifically for
toluene-2,4-diamine, a BCF of 1.06 was estimated.
Based on
these BCF values, toluene-2,4-diamine is not expected to
bioconcentrate significantly in aquatic organisms (HSDB 1999).
|
| |
| LC50 values to fishes, mg/l : |
| 850 |
48hr, Oryzias latipes, MITI 1992 |
| |
-- |
| 1420 |
96 hr, Pimephales promelas, Geiger et al. 1990 |
| |
| EC50 values to fishes, mg/l : |
| 1360 |
96 hr, mbt, Pimephales promelas, Geiger et al. 1990 |
References |
| 1848 | Anon. 1987a.
The list of the existing chemical substances tested
on biodegradability by microorganisms or bioaccumulation in
fish body by Chemicals Inspection & Testing Institute.
Ministry
of International Trade and Industry, MITI.
Japan. |
| 3297 | Geiger, D.
L. et al. 1990.
Acute toxicities of organic
chemicals to fathead minnows (Pimephales promelas) Vol 5.
Center for Lake Superior Environmental Studies, University of
Winsconsin-Superior, Superior, Winconsin, U.S.A. 332.
|
| 3120 | Howard, P.H., Boethling, R.S., Jarvis, W.F., Meylan, W.M. &
Michalenko, E.M., Handbook of Environmental Degradation Rates,
1991.
Lewis Publicers, Inc., Chelsea, Michigan, U.S.A.,
pp. 725.
|
| 3114 | HSDB Database 1992 -.
Hazardous Substances Data Bank.
US.
National Library of Medicine.
TOMES Plus CD-ROM.
|
| 3105 | MITI 1992.
Biodegradation and bioaccumulation data of existing
chemicals based on the CSCL Japan.
Compild under the Safety
Division Basic Industries Bureau Ministry of International
Trade & Industry, Japan.
Edited by Chemicals Inspection &
Testing Institute, Japan.
|
