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| CAS No.: | 301-12-2 |
|---|---|
| Name: | DEMETON-S-METHYL SULFOXIDE |
| Article Data: | 3 |
| Molecular Structure: | |
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|
|
| Formula: | C6H15 O4 P S2 |
| Molecular Weight: | 246.288 |
| Synonyms: | Ethanethiol,2-(ethylsulfinyl)-, S-ester with O,O-dimethyl phosphorothioate (8CI); BAY 21097;Demeton-S methyl sulfoxide; MSR; MSR (pesticide); MSR Spray Concentrate;Metaisosystox sulfoxide; Metasystox R; Methyl oxydemeton S; NSC 370785;O,O-Dimethyl S-[2-(ethylsulfinyl)ethyl] monothiophosphate; O,O-DimethylS-[2-(ethylsulfinyl)ethyl] phosphorothioate; O,O-DimethylS-[2-(ethylsulfinyl)ethyl] thiophosphate; Oxydemeton M; Oxydemeton-methyl; R2170; S-[2-(Ethylsulfinyl)ethyl] O,O-dimethyl phosphorothioate |
| Density: | 1.31g/cm3 |
| Melting Point: | <-20oC |
| Boiling Point: | 377.6°Cat760mmHg |
| Flash Point: | 182.2°C |
| Solubility: | Miscible |
| Hazard Symbols: |
 
|
| Risk Codes: | 24/25-50 |
| Safety: | Poison by ingestion, skin contact, intravenous, and intraperitoneal routes. Human mutation data reported. When heated to decomposition it emits very toxic fumes of POx and SOx. See also DEMETON; DEMETON-O + DEMETON-S; DEMETON-O-METHYL; DEMETON-S; DEMETON-S-METHYL; DEMETON-S-METHYL-SULPHONE. |
| PSA: | 106.92000 |
| LogP: | 2.75480 |
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Chemistry
Empirical Formula of Demeton-O-methyl sulfoxide (CAS NO.301-12-2): C6H15O4PS2
Molecular Weight: 246.2847
EINECS: 206-110-7
Index of Refraction: 1.519
Density: 1.31 g/cm3
Flash Point: 182.2 °C
storage temp.: 0-6 °C
Appearance: Clear amber liquid
Enthalpy of Vaporization: 60.09 kJ/mol
Boiling Point: 377.6 °C at 760 mmHg
Vapour Pressure: 1.45E-05 mmHg at 25 °C
Structure of Demeton-O-methyl sulfoxide (CAS NO.301-12-2):
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| bird - wild | LD50 | oral | 42mg/kg (42mg/kg) | Toxicology and Applied Pharmacology. Vol. 20, Pg. 57, 1971. | |
| chicken | LD50 | oral | 80mg/kg (80mg/kg) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | Toxicology and Applied Pharmacology. Vol. 6, Pg. 147, 1964. |
| duck | LD50 | oral | 54mg/kg (54mg/kg) | Toxicology and Applied Pharmacology. Vol. 20, Pg. 57, 1971. | |
| guinea pig | LD50 | intraperitoneal | 30mg/kg (30mg/kg) | Toxicology and Applied Pharmacology. Vol. 4, Pg. 621, 1962. | |
| guinea pig | LD50 | oral | 120mg/kg (120mg/kg) | Pesticide Chemicals Official Compendium, Association of the American Pesticide Control Officials, Inc., 1966. Vol. -, Pg. 721, 1966. | |
| mouse | LD50 | intraperitoneal | 8mg/kg (8mg/kg) | Toxicology and Applied Pharmacology. Vol. 4, Pg. 621, 1962. | |
| mouse | LD50 | oral | 10mg/kg (10mg/kg) | "Organophosphorus Pesticides: Organic and Biological Chemistry," Eto, M., Cleveland, OH, CRC Press, Inc., 1974Vol. -, Pg. 197, 1974. | |
| pigeon | LD50 | oral | 15mg/kg (15mg/kg) | Toxicology and Applied Pharmacology. Vol. 20, Pg. 57, 1971. | |
| quail | LD50 | oral | 84mg/kg (84mg/kg) | Toxicology and Applied Pharmacology. Vol. 20, Pg. 57, 1971. | |
| rat | LC50 | inhalation | 1500mg/m3/1H (1500mg/m3) | "Agrochemicals Handbook," with updates, Hartley, D., and H. Kidd, eds., Nottingham, Royal Soc of Chemistry, 1983-86Vol. A309, Pg. 1983, | |
| rat | LD50 | intraperitoneal | 20mg/kg (20mg/kg) | Guide to the Chemicals Used in Crop Protection. Vol. 6, Pg. 385, 1973. | |
| rat | LD50 | intravenous | 47mg/kg (47mg/kg) | BEHAVIORAL: GENERAL ANESTHETIC | Biochemical Journal. Vol. 67, Pg. 187, 1957. |
| rat | LD50 | oral | 30mg/kg (30mg/kg) | Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 234, Pg. 352, 1958. | |
| rat | LD50 | skin | 100mg/kg (100mg/kg) | World Review of Pest Control. Vol. 9, Pg. 119, 1970. | |
| rat | LD50 | unreported | 65mg/kg (65mg/kg) | "Chemistry of Pesticides," Melnikov, N.N., New York, Springer-Verlag New York, Inc., 1971Vol. -, Pg. 348, 1971. |
Consensus Reports
EPA Genetic Toxicology Program.
Safety Profile
Poison by ingestion, skin contact, intravenous, and intraperitoneal routes. Human mutation data reported. When heated to decomposition it emits very toxic fumes of POx and SOx. See also DEMETON; DEMETON-O + DEMETON-S; DEMETON-O-METHYL; DEMETON-S; DEMETON-S-METHYL; DEMETON-S-METHYL-SULPHONE.
Hazard Codes of Demeton-O-methyl sulfoxide (CAS NO.301-12-2): 
T
N
Risk Statements: 24/25-50
R24:Toxic in contact with skin.
R25 :Toxic if swallowed.
R50:Very toxic to aquatic organisms.
Safety Statements: 23-36/37-45-61
S23:Do not breathe vapour.
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.)
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
Specification
Demeton-O-methyl sulfoxide ,its cas register number is 301-12-2. It also can be called Oxydemeton methyl ; Methyl demeton ; Methyl demeton-O-sulfoxide and Metasystox-R .