METOXURON Property

Melting point:

124-127 °C

Boiling point:

391.6±42.0 °C(Predicted)

Density 

1.3100 (rough estimate)

refractive index 

1.5500 (estimate)

Flash point:

2 °C

storage temp. 

APPROX 4°C

solubility 

Chloroform (Slightly), DMSO (Slightly)

pka

13.83±0.70(Predicted)

form 

Solid

color 

White to Off-White

Water Solubility 

678mg/L(23 ºC)

EPA Substance Registry System

Metoxuron (19937-59-8)

Safety

Hazard Codes 

N,Xn,F

Risk Statements 

50/53-36-20/21/22-11

Safety Statements 

60-61-36-26-16-36/37

RIDADR 

UN3077 9/PG 3

RTECS 

YS5775000

Toxicity

mouse,LD50,oral,2542mg/kg (2542mg/kg),ENDOCRINE: OTHER CHANGESBLOOD: OTHER CHANGES,Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 47(2), Pg. 13, 1982.

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P273Avoid release to the environment.

P391Collect spillage. Hazardous to the aquatic environment

P501Dispose of contents/container to..…

METOXURON Chemical Properties,Usage,Production

Uses

Metoxuron is used as a herbicide.

Definition

ChEBI: Metoxuron is a member of the class of 3-(3,4-substituted-phenyl)-1,1-dimethylureas that is urea in which one of the nitrogens is substituted by a 3-chloro-4-methoxyphenyl group while the other is substituted by two methyl groups. It is a plant growth regulator and a pre- and post-emergence herbicide used for the control of grasses and broad-leaved weeds in carrots and cereals (e.g. wheat, barley and rye). It has a role as an agrochemical, an environmental contaminant, a herbicide, a xenobiotic, a photosystem-II inhibitor and a plant growth regulator. It is a 3-(3,4-substituted-phenyl)-1,1-dimethylurea, a monomethoxybenzene and a member of monochlorobenzenes.

Metabolic pathway

Photodegradation of metoxuron with UV irradiation in the presence of UV-H2O2 and -TiO2 primarily proceeds with the replacement of the chlorine atom with the hydroxy group and the attack of OH radicals at the 6-position on the phenyl ring. The principal photoproducts identified are 3-(4-methoxy-2,5- paraquinone)-1,1-dimethylurea, hydroxymetoxuron, 3-(3-hydroxy-4-methoxyphenyl)-1,1-dimethylurea, 3-(3-chloro-4-hydroxyphenyl)-1,1-dimethylurea, and 3-(3-chloro-4-methoxyphenyl)-1,1dimethylurea.