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Name	Pyridat	EINECS	259-686-7
CAS No.	55512-33-9	Density	1.183 g/cm³
PSA	77.38000	LogP	6.38950
Solubility	N/A	Melting Point	27°
Formula	C19H23 Cl N2 O2 S	Boiling Point	544.9 °C at 760 mmHg
Molecular Weight	378.923	Flash Point	283.3 °C
Transport Information	UN 3077	Appearance	N/A
Safety	Moderately toxic by ingestion and skin contact. Experimental reproductive effects. When heated to decomposition it emits toxic vapors of NO_x, SO_x, and Cl⁻.	Risk Codes	R38;R43;R50/53
Molecular Structure		Hazard Symbols
Synonyms	CL 11344;Fenpyrate; Lentagran; O-(3-Phenyl-6-chloropyridazin-4-yl) octylthiocarbonate;Pl 3419; Pyridate; Tough	Article Data	2

Pyridat Chemical Properties

IUPAC Name: (6-Chloro-3-phenylpyridazin-4-yl) octylsulfanylformate
The MF of Fenpyrate (CAS NO.55512-33-9) is C₁₉H₂₃ClN₂O₂S.

The MW of Fenpyrate (CAS NO.55512-33-9) is 378.9161.
Synonyms of Fenpyrate (CAS NO.55512-33-9): Carbonothioic acid, O-(6-chloro-3-phenyl-4-pyridazinyl) S-octyl ester ; O-(6-Chlor-3-phenylpyridazin-4-yl)-S-octylthiocarbonat ; pyridate ; Screen ; Thiocarbonate de O-(6-chloro-3-phenyl-4-pyridazinyle) et de S-octyle
Product Categories: PU - PZPesticides&Metabolites;Alpha sort;Herbicides;N-PAlphabetic;P;Pesticides&Metabolites;Pyridazine;Alphabetic
Index of Refraction: 1.56
EINECS: 259-686-7
Density: 1.183 g/ml
Flash Point: 283.3 °C
Boiling Point: 544.9 °C
Storage temp: APPROX (4°C)
Merck: 13,8058

Pyridat Uses

Fenpyrate (CAS NO.55512-33-9) is selective postemergence herbicide. Stems and leaves absorbed quickly and it impede the Hill reaction of photosynthesis, so that leaves turn yellow and stop the growth of weeds, withering death. Applies to wheat, rice, corn and other cereal crops Control in broad-leaved weeds, particularly Galium aparine, Amaranthus retroflexus and some undergraduate weeds.

Pyridat Production

It derived from 6-chloro-3-phenyl-pyridazine-4-Alcohol and S-octyl thio-carbonyl chloride in the presence of triethylamine with benzene as the solvent

Pyridat Toxicity Data With Reference

1.	orl-rat LD50:1970 mg/kg	DEVEAA Defense des Vegetaux. 38 (1984),310.
2.	orl-mus LD50:10 g/kg	DEVEAA Defense des Vegetaux. 35 (1981),327.
3.	skn-rbt LD50:3400 mg/kg	FMCHA2 Farm Chemicals Handbook .(Meister Publishing,Willoughy, OH.: )1991,C257.
4.	orl-qal LD50:1500 mg/kg	PEMNDP Pesticide Manual. 9 (1991),743.
5.	orl-dck LD50:10 g/kg	PEMNDP Pesticide Manual. 9 (1991),743.
6.	orl-brd LD50:10 g/kg	PEMNDP Pesticide Manual. 9 (1991),743.

Pyridat Safety Profile

Moderately toxic by ingestion and skin contact. Experimental reproductive effects. When heated to decomposition it emits toxic vapors of NO_x, SO_x, and Cl⁻.Safety information of Fenpyrate (CAS NO.55512-33-9):
Hazard Codes Irritant Xi, Dangerous N
Risk Statements
38 Irritating to the skin
43 May cause sensitization by skin contact
50/53 Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment
Safety Statements
24 Avoid contact with skin
37 Wear suitable gloves
60 This material and/or its container must be disposed of as hazardous waste
61 Avoid release to the environment. Refer to special instructions safety data sheet
RIDADR UN 3077
RTECS FG3880000

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