| Chemical Abstract Number (CAS #) |
5344821
|
|---|
| CASRN |
5344-82-1 |
|---|
| Synonyms | 1-(o-Chlorophenyl)thiourea |
|---|
Thiourea, (2-chlorophenyl)- |
| Analytical Method |
EPA Method 553 |
|---|
Link to the National Library of Medicine's Hazardous Substances
Database for more details
on this compound. |
| Molecular Formula | C7H7ClN2S |
|---|
| Use | 2-Chlorophenylthiourea is not manufactured or used as end-product industrially in the
USA.
|
|---|
| Apparent Color | NEEDLES OR PLATES
|
|---|
| Melting Point | 146 DEG C
|
|---|
| Molecular Weight | 186.66
|
|---|
| Environmental Impact | No experimental data are available to directly predict the environmental fate of
2-chlorophenylthiourea. 2-Chlorophenylthiourea absorbs sunlight relatively weakly which may
suggest a potential for direct photolysis. Additional estimations of 2-chlorophenylthiourea's
environmental fate are based on its chemical structure and physical properties. If released to the
atmosphere, 2-chlorophenylthiourea should degrade rapidly in the vapor-phase (half-life of 4.3 hr
estimated from chemical structure) by reaction with photochemically produced hydroxyl radicals.
It may additionally exist in air in the adsorbed-particulate phase. 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-chlorophenylthiourea may be converted to a latent form in the
biosphere. If bonding does not occur, 2-chlorophenylthiourea should leach through most soils and
sorption to sediments in water will not be important. No data are available regarding
biodegradation in soil or water. There are no data available which suggest that the general
population is exposed to 2-chlorophenylthiourea.
|
|---|
| Environmental Fate | TERRESTRIAL FATE: 2-Chlorophenylthiourea 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 bonding does not occur, significant leaching is possible. Direct
photolysis on soil surfaces exposed to sunlight may be possible since 2-chlorophenylthiourea
weakly absorbs sunlight. No data are available regarding biodegradation or other chemical
degradation processes in soil.
AQUATIC FATE: Aquatic volatilization and bioconcentration are not expected to be important
with respect to 2-chlorophenylthiourea. 2-Chlorophenylthiourea 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 bonding does not occur, sorption to humic material in
suspended solids and sediments will not be important. Direct photolysis may be possible since
2-chlorophenylthiourea weakly absorbs sunlight. No data are available regarding biodegradation
or other chemical degradation processes in water.
ATMOSPHERIC FATE: When released to the atmosphere in the vapor-phase, 2-
chlorophenylthiourea will degrade rapidly (estimated half-life of 4.3 hr) by reaction with
photochemically produced hydroxyl radicals. However, the vapor pressure of
2-chlorophenylthiourea may be low enough to permit a significant fraction of the
2-chlorophenylthiourea released to air to exist in the adsorbed-particulate phase rather than in the
vapor-phase. Physical removal from the atmosphere may be possible via wet and dry deposition.
|
|---|
