Thidiazuron CAS#51707-55-2

CAS Number: 51707-55-2
Chemical Formula: C9H8N4OS
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

Appearance: Light Yellow Powder

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Thidiazuron CAS#51707-55-2

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.

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	Solid
color	Light yellow to yellow
Merck	13,9384
BRN	1078092
Major Application	agriculture
InChI	InChI=1S/C9H8N4OS/c14-9(12-8-6-10-13-15-8)11-7-4-2-1-3-5-7/h1-6H,(H2,11,12,14)
InChIKey	HFCYZXMHUIHAQI-UHFFFAOYSA-N
SMILES	N(C1=CC=CC=C1)C(NC1SN=NC=1)=O
CAS DataBase Reference	51707-55-2(CAS DataBase Reference)
EPA Substance Registry System	Thidiazuron (51707-55-2)

Safety Information

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
Storage Class	11 - Combustible Solids
Hazard Classifications	Aquatic Acute 1 Aquatic Chronic 1 Eye Irrit. 2 Skin Irrit. 2 STOT SE 3
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).

Product Application of Thidiazuron CAS#51707-55-2

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.

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