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| | Thidiazuron Basic information |
| Product Name: | Thidiazuron | | Synonyms: | Thidiazauron (1-Phenyl-3-(1,2,3-thiadiazol-5-yl)-harnstoff;N-phenyl-N-1,2,3,-thiadiazol-5-yluree;5-(N-Phenylcarbonylamino)-1,2,3-thiadiazole;N-Phenyl-N'-1,2,3-thiodiazol-5-yl urea;THIDIAZURON PESTANAL (1-PHENYL- 3-(1,2,3;THIDIAZURON, 1GM, NEAT;1-PHENYL-3-(1,2,3-THIADIAZOL-5-YL)UREA*P LANT CELL C;TDZ | | CAS: | 51707-55-2 | | MF: | C9H8N4OS | | MW: | 220.25 | | EINECS: | 257-356-7 | | Product Categories: | Aromatics;Heterocycles;Cytokinins;Plant Growth Regulators;Sulfur & Selenium Compounds;plantgrowth;Plant Tissue Culture;Herbicides;Pesticides;Pesticides&Metabolites;Plant growth regulatorsAlphabetic;TF - TOPesticides&Metabolites;Urea structure;Alpha sort;Plant growth regulatorsPesticides&Metabolites;Q-ZAlphabetic | | Mol File: | 51707-55-2.mol |  |
| | Thidiazuron Chemical Properties |
| Melting point | 213°C | | density | 1.3493 (rough estimate) | | refractive index | 1.6390 (estimate) | | storage temp. | Sealed in dry,2-8°C | | solubility | Soluble in DMSO | | pka | 12.06±0.70(Predicted) | | form | neat | | Merck | 13,9384 | | BRN | 1078092 | | InChIKey | HFCYZXMHUIHAQI-UHFFFAOYSA-N | | CAS DataBase Reference | 51707-55-2(CAS DataBase Reference) | | EPA Substance Registry System | Thidiazuron (51707-55-2) |
| Hazard Codes | Xi,N | | Risk Statements | 36/37/38-51/53 | | Safety Statements | 22-26-36-61 | | RIDADR | UN 3077 9 / PGIII | | WGK Germany | 3 | | RTECS | YU1395000 | | HS Code | 2934999090 | | Hazardous Substances Data | 51707-55-2(Hazardous Substances Data) | | Toxicity | LC50 (96-hour) for bluegill sun?sh, channel cat?sh and rainbow trout >1,000
mg/L (Hartley and Kidd, 1987); acute oral LD50 for rats >5,000 mg/kg (Hartley and Kidd,
1987), 5,350 mg/kg (RTECS, 1985). |
| | Thidiazuron Usage And Synthesis |
| Chemical Properties | The pure product is a white odorless and tasteless crystalline solid. m.p.210～212.5°C (decomposition at 217°C), vapor pressure 4×10-9Pa) (25°C). Solubility at 25°C: dimethyl sulfoxide>500g/L, dimethylformamide>500g/L, cyclohexanone 21.5g/L, acetone 8g/L, methanol 4.5g/L, ethyl acetate 0.8 g/L, hexane 6mg/L, insoluble in aliphatic and aromatic hydrocarbons, solubility in water 31mg/L. The partition coefficient is 59 (pH=7.3). Stable below 200°C; stable to water at room temperature, half-life > 24d; half-life in soil < 60d. | | Uses | Thidiazuron is a non-purine containing urea derivative with cytokinin activity.
Thidiazuron is used as a cotton defoliant and a plant growth regulator in tissue culture. | | Uses | Plant growth regulator used to defoliate cotton to facilitate harvesting. | | Definition | ChEBI: Thidiazuron is a member of ureas. | | General Description | Thidiazuron is a systemic herbicide, widely employed as an effective plant growth regulator and pre-harvest defoliant for crops such as cotton. | | Agricultural Uses | Thidiazuron is substituted urea that is used to defoliate
cotton plants. Thidiazuron, which has cytokinin activity,
is one of the many harvesting aids needed in agriculture. | | Agricultural Uses | Herbicide, Defoliant, Plant growth regulator: Used primarily as a cotton defoliant in order to increase
the harvest yield. Not applied to food crops. Not approved
for use in EU countries. Registered for use in the U.S.
U.S. Maximum Allowable Residue Levels for Thidiazuron
and its aniline-containing metabolites in or on the following
food commodities: [40 CFR 180.403(a)]: cattle,
fat 0.4 ppm; cattle, meat 0.4 ppm; cattle, meat byproducts
0.4 ppm; cotton, gin byproducts 24.0 ppm; cotton,
undelinted seed 0.3 ppm; goat, fat 0.4 ppm; goat meat
0.4 ppm; goat, meat byproducts 0.4 ppm; hog, fat 0.4 ppm;
hog, meat 0.4 ppm; hog, meat byproducts 0.4 ppm; horse,
fat 0.4 ppm; horse, meat 0.4 ppm; horse, meat byproducts
0.4 ppm; milk 0.05 ppm; sheep, fat 0.4 ppm; sheep, meat
0.4 ppm; sheep, meat byproducts 0.4 ppm. | | Trade name | DAZE®; DEFOLIT®; DROPP®;
GINSTAR EC® (thidiazuron + diuron); LEAFLESS®
Tthidiazuron; SN 49537® | | Safety Profile | Moderately toxic by
ingestion. Experimental reproductive
effects. When heated to decomposition it
emits toxic fumes of SOx and NOx. | | Environmental Fate | Soil. The reported half-life in soil is approximately 26–144 days (Hartley and Kidd,
1987).
Photolytic. Rapidly converted to the photoisomer, 1-phenyl-3-(1,2,5-thiadiazol-3-
yl)urea (Worthing and Hance, 1991). When thidiazuron adsorbed by soil was exposed to
UV light (λ <290 nm), 1-phenyl-3-(1,2,5-thiadiazol-3-yl)urea formed as the majo |
| | Thidiazuron Preparation Products And Raw materials |
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