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| CAS No.: | 21087-64-9 |
|---|---|
| Name: | Metribuzin |
| Article Data: | 35 |
| Molecular Structure: | |
|
|
|
| Formula: | C8H14N4OS |
| Molecular Weight: | 214.291 |
| Synonyms: | 4-Amino-6-tert-butyl-3-(methylthio)-1,2,4-triazin-5(4H)-one;4-Amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one;Bay 94337;Bayer 6159H;Lexone 4L;Lexone 75DF;Preview;Salute;Sencor 4L;Sencor 75DF;Sencoral; |
| EINECS: | 244-209-7 |
| Density: | 1.31 g/cm3 |
| Melting Point: | 125 °C |
| Boiling Point: | 312.4 °C at 760 mmHg |
| Flash Point: | 142.7 °C |
| Solubility: | slightly soluble in water |
| Appearance: | colorless crystalline solid |
| Hazard Symbols: |
 Xn, N, F
|
| Risk Codes: | 22-50/53-36-20/21/22-11 |
| Safety: | 2-60-61-36-26-16 |
| Transport Information: | UN 3077 9/PG 3 |
| PSA: | 99.10000 |
| LogP: | 0.95270 |
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Chemistry
Molecular structure of Metribuzin (CAS NO.21087-64-9) is:
Product Name: Metribuzin
CAS Registry Number: 21087-64-9
IUPAC Name: 4-amino-6-tert-butyl-3-methylsulfanyl-1,2,4-triazin-5-one
Molecular Weight: 214.28796 [g/mol]
Molecular Formula: C8H14N4OS
XLogP3: 1.7
H-Bond Donor: 1
H-Bond Acceptor: 4
EINECS: 244-209-7
Melting Point: 125 °C
Water Solubility: Slightly soluble
Surface Tension: 47.4 dyne/cm
Density: 1.31 g/cm3
Flash Point: 142.7 °C
Enthalpy of Vaporization: 55.34 kJ/mol
Boiling Point: 312.4 °C at 760 mmHg
Vapour Pressure: 0.000531 mmHg at 25°C
Product Categories: Herbicide; Endocrine Disruptors (Draft)Alphabetic; METI - MZPesticides&Metabolites; Triazinone structure; Alpha sort; Endocrine Disruptors (Draft)Pesticides&Metabolites; EPA; Herbicides; H-MAlphabetic; M; Method Specific
Uses
Metribuzin (CAS NO.21087-64-9) can be used as an herbicide. Also it is widely applied in potatoes,tomatoes,sugarcane,asparagus,pineapple.
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| cat | LD50 | oral | > 500mg/kg (500mg/kg) | "Agrochemicals Handbook," with updates, Hartley, D., and H. Kidd, eds., Nottingham, Royal Soc of Chemistry, 1983-86Vol. A280, Pg. 1983, | |
| guinea pig | LD50 | oral | 250mg/kg (250mg/kg) | "Wirksubstanzen der Pflanzenschutz und Schadlingsbekampfungsmittel," Perkow, W., Berlin, Verlag Paul Parey, 1971-1976Vol. -, Pg. -, 1971/1976. | |
| mouse | LC | inhalation | > 860mg/m3/4H (860mg/m3) | "Documentation of the Threshold Limit Values and Biological Exposure Indices," 5th ed., Cincinnati, OH, American Conference of Governmental Industrial Hygienists, Inc., 1986Vol. 6, Pg. 1042, 1991. | |
| mouse | LD50 | intraperitoneal | 210mg/kg (210mg/kg) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) | Pesticide Biochemistry and Physiology. Vol. 23, Pg. 123, 1984. |
| mouse | LD50 | oral | 564mg/kg (564mg/kg) | Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. Vol. 12, Pg. 127, 1987. | |
| mouse | LD50 | skin | > 1gm/kg (1000mg/kg) | Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. Vol. 12, Pg. 127, 1987. | |
| mouse | LD50 | subcutaneous | 367mg/kg (367mg/kg) | Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. Vol. 12, Pg. 127, 1987. | |
| quail | LD50 | oral | 164mg/kg (164mg/kg) | Pesticide Manual. Vol. 8, Pg. 573, 1987. | |
| quail | LD50 | unreported | 168mg/kg (168mg/kg) | Farm Chemicals Handbook. Vol. -, Pg. C204, 1991. | |
| rabbit | LD50 | skin | > 20gm/kg (20000mg/kg) | Farm Chemicals Handbook. Vol. -, Pg. C204, 1991. | |
| rat | LC50 | inhalation | > 860mg/m3/4H (860mg/m3) | Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. Vol. 12, Pg. 127, 1987. | |
| rat | LD50 | intraperitoneal | 239mg/kg (239mg/kg) | Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. Vol. 12, Pg. 127, 1987. | |
| rat | LD50 | oral | 1100mg/kg (1100mg/kg) | Farm Chemicals Handbook. Vol. -, Pg. C204, 1991. | |
| rat | LD50 | skin | 2gm/kg (2000mg/kg) | "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 1001, 1986. | |
| rat | LD50 | subcutaneous | 814mg/kg (814mg/kg) | Nippon Noyaku Gakkaishi. Journal of the Pesticide Science Society of Japan. Vol. 12, Pg. 127, 1987. |
Safety Profile
Poison by ingestion and intraperitoneal routes. Low toxicity by skin contact. When heated to decomposition it emits very toxic fumes of NOx and SOx.
Hazard Codes: 
Xn,
N,
F
Risk Statements: 22-50/53-36-20/21/22-11
R22:Harmful if swallowed.
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
R36:Irritating to eyes.
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed.
R11:Highly flammable.
Safety Statements: 2-60-61-36-26-16
S2:Keep out of the reach of children.
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.
S36:Wear suitable protective clothing.
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S16:Keep away from sources of ignition.
RIDADR: UN3077 9/PG 3
RTECS: XZ2990000
Specification
Metribuzin , its cas register number is 21087-64-9. It also can be called 4-Amino-6-tert-butyl-3-(methylthio)-1,2,4-triazin-5(4H)-one ; 4-Amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one ; Bay 94337 ; Bayer 6159H ; Lexone 4L ; Lexone 75DF ; Preview ; Salute ; Sencor 4L ; Sencor 75DF ; Sencoral . It is a colorless crystalline solid.And it is A triazine derivative.