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| CAS No.: | 21923-23-9 |
|---|---|
| Name: | Chlorthiophos |
| Molecular Structure: | |
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| Formula: | C11H15 Cl2 O3 P S2 |
| Molecular Weight: | 361.25 |
| Synonyms: | CELA S2957;Celamerck S 2957;Celathion;Celathion (pesticide);Chlorthiophos I;O-[2,5-Dichloro-4-(methylthio)phenyl] O,O-diethyl phosphorothioate;S 2957; |
| EINECS: | 244-663-6 |
| Density: | 1.38g/cm3 |
| Boiling Point: | 391.9°Cat760mmHg |
| Flash Point: | 190.8°C |
| Safety: | Poison by ingestion and skin contact. When heated to decomposition it emits toxic fumes of Cl−, POx, and SOx. |
| PSA: | 94.89000 |
| LogP: | 6.04220 |
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Chemistry
IUPAC Name: (2,5-Dichloro-4-methylsulfanylphenoxy)-diethoxy-sulfanylidene-λ5-phosphane
Synonyms of Chlorthiophos (CAS NO.21923-23-9) : Chlorthiofos I ; O-(2,5-Dichloro-4-(methylthio)phenyl)phosphorothioic Acid O,O-Diethyl Ester ; Phosphorothioic acid, O-[2,5-dichloro-4-(methylthio)phenyl] O,O-diethyl ester
CAS NO: 21923-23-9
Molecular Formula:C11H15Cl2O3PS2
Molecular Weight :361.2448
Molecular Structure :.png)
Index of Refraction: 1.578
Surface Tension: 52.8 dyne/cm
Density: 1.38 g/cm3
Flash Point: 190.8 °C
Enthalpy of Vaporization: 61.65 kJ/mol
Boiling Point: 391.9 °C at 760 mmHg
Vapour Pressure: 5.38E-06 mmHg at 25°C
Appearance: Chlorthiophos (CAS NO.21923-23-9) is yellow-brown liquid which tends to crystallize at less than 77F.
Uses
Chlorthiophos (CAS NO.21923-23-9) is used as an insecticide and acaricide.
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| chicken | LD50 | oral | 45mg/kg (45mg/kg) | BEHAVIORAL: ATAXIA BEHAVIORAL: FOOD INTAKE (ANIMAL) | Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial Hygiene and Toxicology. Vol. 27, Pg. 3, 1976. |
| guinea pig | LD50 | oral | 58mg/kg (58mg/kg) | Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial Hygiene and Toxicology. Vol. 27, Pg. 3, 1976. | |
| mouse | LD50 | oral | 141mg/kg (141mg/kg) | Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial Hygiene and Toxicology. Vol. 27, Pg. 3, 1976. | |
| quail | LD50 | oral | 45mg/kg (45mg/kg) | Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial Hygiene and Toxicology. Vol. 27, Pg. 3, 1976. | |
| rabbit | LD50 | oral | 20mg/kg (20mg/kg) | Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial Hygiene and Toxicology. Vol. 27, Pg. 3, 1976. | |
| rabbit | LD50 | skin | 31mg/kg (31mg/kg) | Defense des Vegetaux. Vol. 36, Pg. 31, 1982. | |
| rat | LD50 | oral | 13mg/kg (13mg/kg) | SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD LUNGS, THORAX, OR RESPIRATION: DYSPNEA | Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial Hygiene and Toxicology. Vol. 27, Pg. 3, 1976. |
| rat | LD50 | skin | 58mg/kg (58mg/kg) | Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial Hygiene and Toxicology. Vol. 27, Pg. 3, 1976. |
Consensus Reports
EPA Extremely Hazardous Substances List.
Safety Profile
Poison by ingestion and skin contact. When Chlorthiophos (CAS NO.21923-23-9) is heated to decomposition ,it emits toxic fumes of Cl−, POx, and SOx.
Specification
1.Reactivity Profile: Organophosphates, such as Chlorthiophos, are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.
2.Health Hazard :Classified as extremely hazardous by the World Health Organization(Non-Specific -- Organophosphorus Pesticide) Organic phosphorus insecticides are absorbed by the skin, as well as by the respiratory and gastrointestinal tracts. They are cholinesterase inhibitors.
3.Fire Hazard :(Non-Specific -- Organophosphorus Pesticide, Liquid, n.o.s.) Container may explode in heat of fire.