SPECTRUM

Chemical Fact Sheet

Chemical Abstract Number (CAS #) 5344821
CASRN 5344-82-1
Synonyms1-(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 FormulaC7H7ClN2S
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.

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