Basic information
- Name:
Temephos
- CAS No.:
3383-96-8
- Molecular Structure:
- Formula:
- C16H20O6P2S3
- Synonyms:
- Nephis 1G;O,O,O',O'-Tetramethyl O,O'-thiodi-p-phenylene phosphorothioate;Temefos;Phosphorothioic acid,Op,Op'-(thiodi-4,1-phenylene) Op,Op,Op',Op'-tetramethyl ester;Phosphorothioicacid, O,O-dimethyl ester, O,O-diester with 4,4'-thiodiphenol (7CI);Phosphorothioic acid, O,O'-(thiodi-4,1-phenylene) O,O,O',O'-tetramethyl ester(9CI);Phosphorothioic acid, O,O'-(thiodi-p-phenylene) O,O,O',O'-tetramethylester (8CI);AC 52160;Abate;Abathion;Azai-SS;Biothion;Biothon;Difenphos;Difos;Diphos;
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Chemistry
IUPAC Name: [4-(4-dimethoxyphosphinothioyloxyphenyl)sulfanylphenoxy]-dimethoxy-sulfanylidene-λ5-phosphane
Empirical Formula: C16H20O6P2S3
Molecular Weight: 466.4689
EINECS: 222-191-1
Structure of Temephos (CAS NO.3383-96-8):
Index of Refraction: 1.612
Molar Refractivity: 115.9 cm3
Molar Volume: 333.1 cm3
Polarizability: 45.94×10-24cm3
Surface Tension: 61.8 dyne/cm
Density: 1.4 g/cm3
Flash Point: 267.4 °C
Enthalpy of Vaporization: 76.12 kJ/mol
Melting Point: 30-31°C
Boiling Point: 518.5 °C at 760 mmHg
Vapour Pressure: 2.44E-10 mmHg at 25°C
Storage temp: 2-8°C
Water Solubility: 0.003 g/100 mL
Product Categories: Antibiotics T-ZPesticides;Alpha sort;Antibiotics;Antibiotics A to;Insecticides;OrganophorousPesticides&Metabolites;Q-ZAlphabetic;TA - TE
Canonical SMILES: COP(=S)(OC)OC1=CC=C(C=C1)SC2=CC=C(C=C2)OP(=S)(OC)OC
InChI: InChI=1S/C16H20O6P2S3/c1-17-23(25,18-2)21-13-5-9-15(10-6-13)27-16-11-7-14(8-12-16)22-24(26,19-3)20-4/h5-12H,1-4H3
InChIKey: WWJZWCUNLNYYAU-UHFFFAOYSA-N
Uses
The uses of Temephos are as follows:
1.Temefos or Temephos (CAS NO.3383-96-8) (trade name Abate) is an organophosphate larvicide used to treat water infested with disease-carrying fleas.
2.It is also used to control mosquito, midge, and black fly larvae.
3.In the developing world where the vector-borne disease dengue fever is endemic, Temephos (CAS NO.3383-96-8) is widely used and applied by both private and public pest control in areas of standing water where the Aedes aegypti mosquito breeds in order to reduce the population of this disease-carrying insect.
4.Temephos (CAS NO.3383-96-8) is also used in the Guinea Worm Eradication program to kill water fleas that carry guinea worm larvae.
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| bird - wild | LD50 | oral | 32mg/kg (32mg/kg) | Toxicology and Applied Pharmacology. Vol. 20, Pg. 57, 1971. | |
| chicken | LD | subcutaneous | > 1gm/kg (1000mg/kg) | BEHAVIORAL: MUSCLE WEAKNESS | Archives of Environmental Health. Vol. 14, Pg. 283, 1967. |
| duck | LD50 | oral | 79mg/kg (79mg/kg) | Toxicology and Applied Pharmacology. Vol. 20, Pg. 57, 1971. | |
| mammal (species unspecified) | LD50 | oral | 4700mg/kg (4700mg/kg) | Journal of the American Veterinary Medical Association. Vol. 152, Pg. 282, 1968. | |
| mammal (species unspecified) | LD50 | unreported | 4gm/kg (4000mg/kg) | "Chemistry of Pesticides," Melnikov, N.N., New York, Springer-Verlag New York, Inc., 1971Vol. -, Pg. 338, 1971. | |
| mouse | LD50 | intraperitoneal | 683mg/kg (683mg/kg) | BEHAVIORAL: ALTERED SLEEP TIME (INCLUDING CHANGE IN RIGHTING REFLEX) BEHAVIORAL: TREMOR BEHAVIORAL: ATAXIA | Toho Igakkai Zasshi. Journal of Medical Society of Toho University. Vol. 16, Pg. 297, 1969. |
| mouse | LD50 | oral | 223mg/kg (223mg/kg) | Agricultural Research Service, USDA Information Memorandum. Vol. 20, Pg. 1, 1966. | |
| pigeon | LD50 | oral | 50mg/kg (50mg/kg) | Toxicology and Applied Pharmacology. Vol. 20, Pg. 57, 1971. | |
| quail | LD50 | oral | 75mg/kg (75mg/kg) | Archives of Environmental Contamination and Toxicology. Vol. 12, Pg. 355, 1983. | |
| rabbit | LD50 | oral | 313mg/kg (313mg/kg) | Veterinariya. Veterinary Science. Vol. 60(11), Pg. 63, 1984. | |
| rabbit | LD50 | skin | 970mg/kg (970mg/kg) | Toxicological Information on Cyanamid Insecticides. Vol. 8/1966, | |
| rat | LD50 | intraperitoneal | 912mg/kg (912mg/kg) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: TREMOR GASTROINTESTINAL: CHANGES IN STRUCTURE OR FUNCTION OF SALIVARY GLANDS | Toho Igakkai Zasshi. Journal of Medical Society of Toho University. Vol. 16, Pg. 297, 1969. |
| rat | LD50 | oral | 1gm/kg (1000mg/kg) | Guide to the Chemicals Used in Crop Protection. Vol. 6, Pg. 493, 1973. | |
| rat | LD50 | skin | 1370mg/kg (1370mg/kg) | World Review of Pest Control. Vol. 9, Pg. 119, 1970. | |
| rat | LD50 | subcutaneous | 2302mg/kg (2302mg/kg) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) | Toho Igakkai Zasshi. Journal of Medical Society of Toho University. Vol. 16, Pg. 297, 1969. |
| rat | LD50 | unreported | 8600mg/kg (8600mg/kg) | Travaux de la Societe de Pharmacie de Montpellier. Vol. 37(1), Pg. 45, 1977. |
Consensus Reports
Reported in EPA TSCA Inventory.
Safety Profile
Hazard Codes: 
Xn,
N
Risk Statements: 21/22-51/53
R21/22:Harmful in contact with skin and if swallowed.
R51/53:Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 22-37-61-60
S22:Do not breathe dust.
S37:Wear suitable gloves.
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
S60:This material and its container must be disposed of as hazardous waste.
RIDADR: UN 3077
RTECS: TF6890000
Poison by ingestion. Moderately toxic by intraperitoneal, subcutaneous, and skin contact routes. An experimental teratogen. A skin irritant. A cholinesterase inhibitor type of insecticide. When heated to decomposition it emits toxic fumes of POx and SOx. See also Parathion.
Standards and Recommendations
OSHA PEL: TWA Total Dust: 10 mg/m3; Respirable Fraction: 5 mg/m3
ACGIH TLV: TWA 10 mg/m3
Specification
Temephos , its cas register number is 3383-96-8. It also can be called Biothion ; Bis-p-(O,O-dimethyl O-phenylphosphorothioate)sulfide ; Bithion ; Difenphos ; Difos ; Diphos ; Diphos (pesticide) ; EPA Pesticide Chemical Code 059001 ; Etidronsaeure ; Lypor ; Nephis ; Nimitex ; O,O'-(Thiodi-4,1-phenylene) O,O,O',O'-tetramethyl di(phosphorothioate) ; Phenol, 4,4'-thiodi-, O,O-diester with O,O-dimethyl phosphorothioate ; Procida ; Swebat ; Temefosum ; Tetramethyl O,O'-thiodi-p-phenylene phosphorothioate . Temephos (CAS NO.3383-96-8) is a White crystalline solid or liquid.
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