| Chemical Abstract Number (CAS #) |
606202
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| Synonyms | 2,6-Dinitrotoluene |
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Benzene, 2-methyl-1,3-dinitro- | 2,6-DNT |
| Analytical Methods |
EPA Method 609 |
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EPA Method 625 |
EPA Method 8250A |
| Molecular Formula | C7H6N2O4 |
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| Use | CHEM INT FOR TOLUENE-2,6-DIAMINE, A TOLUENE DIISOCYANATE INT;
GELATINIZING & WATERPROOFING AGENT IN EXPLOSIVES
Used in the synthesis of TNT, urethane polymers, flexible and rigid foams, surface coatings and
dyes
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| Apparent Color | RHOMBIC NEEDLES FROM ALCOHOL; Yellow to red solid
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| Odor | Slight odor
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| Boiling Point | 285 deg C
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| Melting Point | 66 DEG C
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| Density | 1.2833 @ 111 DEG C
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| Sensitivity Data | Immediately irritating to the eye.
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| Environmental Impact | Recent information indicated that two companies produced 2,6-dinitrotoluene
(2,6-DNT) as a mixture with 2,4-DNT. No specific use information was found for 2,6-DNT;
however, dinitrotoluenes are used in organic synthesis, dyes, and explosives and probably some of
it is consumed in isocyanate production along with 2,4-DNT. Information on the routes and
amounts of 2,6-DNT released to the environment was not found; however, 2,6-DNT may enter
the environment from its production and use. If released to soil, 2,6-DNT is expected to
biodegrade. It should be fairly mobile, based on experiments in sandy loam and sandy slit loam
soil. If released to water, 2,6-DNT will readily biodegrade. Photooxidation should be rapid in
surface layers of water. 2,6-DNT should not adsorb appreciably to sediments or suspended solids.
Volatilization from water or soil will not be significant. In the atmosphere, 2,6-DNT will not react
with photochemically produce hydroxyl radicals. Its half-life is estimated to be 47 days. Exposure
to 2,6-DNT will primarily be occupational via dermal contact.
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| Environmental Fate | TERRESTRIAL FATE: If released in soil, 2,6-DNT would be expected to readily
biodegrade. 2,6-DNT's half-life in two soils was 73 and 92 days . The calculated soil adsorption
coefficient (KOC = 204 ) for 2,6-dinitrotoluene (2,6-DNT) and an estimated log KOW of
1.72 indicates that 2,6-DNT is slightly mobile in soil(3,SRC). However, experimental data with
2,6-DNT in two soils indicates that its adsorptivity to soil is much lower . Due to its very low
vapor pressure, volatilization from the soil surface should be negligible(5,SRC). Aromatic nitro
compounds are not susceptible to hydrolysis .
AQUATIC FATE: 2,6-DNT readily degrades in both river water and sea water and this would
be expected to be the most significant fate process in the aquatic environment(6-8). The estimated
log Koc for 2,6-DNT(1,3) and experimental adsorption data, suggests that 2,6-DNT will have a
slight tendency to sorb to sediments, suspended solids and biota. Volatilization from rivers and
lakes will not be significant based on calculations using an estimated Henry's Law constant(3-4).
The half-life for 2,6-DNT in river water exposed to sunlight was 12 minutes and was determined
to be an indirect photoreaction . Thus, photolysis may be a removal mechanism for 2,6-DNT in
surface layers of water.
ATMOSPHERIC FATE: 2,6-DNT degrades by reaction with photochemically produced hyroxyl
radicals in the atmosphere. Its half-life is estimated to be 47 days(1,SRC).
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| Drinking Water Impact | SEAWATER: 2,6-Dinitrotoluene was found in Dokai Bay, Japan at concentrations up
to 14.8 ug/l .
DRINKING WATER: 2,6-Dinitrotoluene was found in drinking water at an unspecified location
at an unspecified concentration .
SURFACE WATER: 2,6-Dinitrotoluene concns of 4.1 and 7.6 ug/L were detected in surface
water samples collected from two brooks near Hirschagen/Waldhof, Germany in the vicinity of
munitions manufacture during World War II ; the river into which the brooks feed (River
Losse) had a concn of 0.1 ug/L ; two ponds in manufacture) had levles of 0.3 and 0.07 ug/L ;
the ponds feed into the River Oder which had a level of 0.02 ug/L .
EFFL: 2,6-Dinitrotoluene (2,6-DNT) concentration in raw wastewater from a textile plant was
50 mg/cu m and was an average of 4.3 mg/l in the wastewater from 2,4,6-trinitrotoluene
production .
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