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| CAS No.: | 24934-91-6 |
|---|---|
| Name: | CHLORMEPHOS |
| Article Data: | 8 |
| Molecular Structure: | |
|
|
|
| Formula: | C5H12 Cl O2 P S2 |
| Molecular Weight: | 234.708 |
| Synonyms: | Chlormephos;Chlormephos-ethyl; Chlormethylfos; Dotan; MC 2188; O,O-Diethyl S-(chloromethyl)dithiophosphate; S-Chloromethyl O,O-diethyl phosphorothiolothionate |
| Density: | 1.295g/cm3 |
| Melting Point: | 25°C |
| Boiling Point: | 249.5°Cat760mmHg |
| Flash Point: | 104.7°C |
| Solubility: | 60 mg l-1(20 °C) |
| Hazard Symbols: |
 
|
| Risk Codes: | 27/28-50/53 |
| Safety: | Poison by inhalation, ingestion and skin contact. Symptoms may include nausea, vomiting, abdominal cramps, diarrhea, excessive salivation, headache, giddiness, weakness, muscle twitching, difficult breathing, blurring or dimness of vision, and loss of muscle coordination. Death may occur from failure of the respiratory center, paralysis of the respiratory muscles, or intense bronchoconstriction. An organophosphorus pesticide. Combustible. For small fires, use dry chemical, carbon dioxide, water spray, or foam. For large fires, use water spray, fog, or foam. When heated to decomposition it emits toxic fumes of Cl−, POx, and SOx. |
| PSA: | 85.66000 |
| LogP: | 3.86400 |
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Chemistry
IUPAC Name: Chloromethylsulfanyl-diethoxy-sulfanylidene-λ5-phosphane
Synonyms of Chlormephos (CAS NO.24934-91-6) : Dithiophosphate de S-(chlorométhyle) et de O,O-diéthyle ; Phosphorodithioic acid, S-(chloromethyl) O,O-diethyl ester ; S-(Chlormethyl)-O,O-diethyldithiophosphat ; S-(chloromethyl) O,O-diethyl phosphorodithioate
CAS NO:24934-91-6
Molecular Formula:C5H12ClO2PS2
Molecular Weight :234.7
Molecular Structure :
EINECS: 246-538-1
Index of Refraction: 1.526
Surface Tension: 46.5 dyne/cm
Density: 1.295 g/cm3
Flash Point: 104.7 °C
Enthalpy of Vaporization: 46.7 kJ/mol
Boiling Point: 249.5 °C at 760 mmHg
Vapour Pressure: 0.0362 mmHg at 25°C
Storage temp: 0-6°C
Appearance:Colorless liquid
Water solubility: Chlormephos (CAS NO.24934-91-6) is slightly soluble in water .
Uses
Chlormephos (CAS NO.24934-91-6) us used as a soil insecticide.
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| chicken | LD50 | oral | 65mg/kg (65mg/kg) | National Technical Information Service. Vol. OTS0571931, | |
| dog | LDLo | oral | 12500ug/kg (12.5mg/kg) | BEHAVIORAL: ATAXIA GASTROINTESTINAL: ULCERATION OR BLEEDING FROM LARGE INTESTINE GASTROINTESTINAL: NAUSEA OR VOMITING | National Technical Information Service. Vol. OTS0570896, |
| guinea pig | LD50 | oral | 14mg/kg (14mg/kg) | National Technical Information Service. Vol. OTS0571931, | |
| quail | LD50 | oral | 260mg/kg (260mg/kg) | "Agrochemicals Handbook," with updates, Hartley, D., and H. Kidd, eds., Nottingham, Royal Soc of Chemistry, 1983-86Vol. A081, Pg. 1983, | |
| rabbit | LD50 | skin | > 1600mg/kg (1600mg/kg) | Pesticide Manual. Vol. 9, Pg. 148, 1991. | |
| rat | LC50 | inhalation | 88mg/m3/4H (88mg/m3) | SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE BEHAVIORAL: TREMOR KIDNEY, URETER, AND BLADDER: INCONTINENCE | National Technical Information Service. Vol. OTS0571210, |
| rat | LD50 | oral | 7mg/kg (7mg/kg) | Farm Chemicals Handbook. Vol. -, Pg. C70, 1991. | |
| rat | LD50 | skin | 27mg/kg (27mg/kg) | Guide to the Chemicals Used in Crop Protection. Vol. 6, Pg. 103, 1973. | |
| rat | LD50 | subcutaneous | 45mg/kg (45mg/kg) | SENSE ORGANS AND SPECIAL SENSES: LACRIMATION: EYE BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: TREMOR | National Technical Information Service. Vol. OTS0571075, |
Consensus Reports
EPA Extremely Hazardous Substances List.
Safety Profile
Poison by inhalation, ingestion and skin contact. Symptoms may include nausea, vomiting, abdominal cramps, diarrhea, excessive salivation, headache, giddiness, weakness, muscle twitching, difficult breathing, blurring or dimness of vision, and loss of muscle coordination. Death may occur from failure of the respiratory center, paralysis of the respiratory muscles, or intense bronchoconstriction. An organophosphorus pesticide. Combustible. For small fires, use dry chemical, carbon dioxide, water spray, or foam. For large fires, use water spray, fog, or foam. When heated to decomposition it emits toxic fumes of Cl−, POx, and SOx.
Hazard Codes
T+
N
Risk Statements 27/28-50/53
R27/28: Very Toxic in contact with skin and if swallowed
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements 28-36/37-45-60-61
S28:After contact with skin, wash immediately with plenty of soap-suds.
S36/37:Wear suitable protective clothing and gloves.
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S60:This material and its container must be disposed of as hazardous waste.
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
RIDADR 3018
RTECS TD5170000
HazardClass 6.1(a)
PackingGroup II
Specification
1.Reactivity Profile :Organophosphates, such as Chlormephos , 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 :(Non-Specific -- Organophosphorus Pesticide, Liquid, n.o.s.) Chlormephos is poisonous; it may be fatal if inhaled, swallowed, or absorbed through the skin.
3.Fire Hazard :(Non-Specific -- Organophosphorus Pesticide, Liquid, n.o.s.) Container may explode in heat of fire. Fire and runoff from control water may produce irritating or poisonous gases.