Orthosulfamuron Property

Melting point:

160–162°C

Density 

1.466±0.06 g/cm3(Predicted)

vapor pressure 

<1.1 × 10-4 (Pa at 25 °C)

storage temp. 

Refrigerator, under inert atmosphere

solubility 

Solubility in organic solvents (g/l at 20 °C)
Acetone 20
Ethyl acetate 3.3
Dichloromethane 56
n‐Heptane 0.00023
Methanol 8.3
Xylene 0.13

pka

Dissociation constant (pKa at 20 °C) Predicted to have five overlapping dissociation constants: ?1.4, 0.7, 3.5, 9.6, 11.5

color 

White to Off-White

Water Solubility 

Solubility in water (g/l at 20 °C) 0.026 (pH 4, buffer) 0.63 (pH 7, buffer) 39 (pH 8.5, buffer)

BRN 

11343666

Stability:

Moisture Sensitive

LogP

0.3-2.02 at 20℃ and pH4-9

Surface tension

71.4mN/m at 37.7mg/L and 22℃

EPA Substance Registry System

Benzamide, 2-[[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]amino]-N,N-dimethyl- (213464-77-8)

Safety

WGK Germany 

3

Hazardous Substances Data

213464-77-8(Hazardous Substances Data)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H400Very toxic to aquatic life

Precautionary statements

P273Avoid release to the environment.

P391Collect spillage. Hazardous to the aquatic environment

P501Dispose of contents/container to..…

Orthosulfamuron Chemical Properties,Usage,Production

Uses

Orthosulfamuron can be used in biological study and agricultural use of herbicidal composition comprising erlukuilincaotong, cyhalofop-?butyl and sulfonylurea herbicide, and its application in controlling annual weed of rice field.

Definition

ChEBI: Orthosulfamuron is an N-sulfonylurea and sulfuric amide resulting from the formal condensation of sulfuric acid with the primary amino group of 1-(4,6-dimethoxypyrimidin-2-yl)urea and with the primary amino group of 2-amino-N,N-dimethylbenzamide (1 mol eq. of each). An acetolactate synthase inhibitor, it is used as a pre- and post-emergent herbicide for the treatment of grasses and broad-leaved weeds in rice crops. It has a role as an EC 2.2.1.6 (acetolactate synthase) inhibitor and a herbicide. It is a tertiary carboxamide, a sulfuric amide, a N-sulfonylurea and an aromatic ether.

Agricultural Uses

Orthosulfamuron (IR‐5878, CAS no.: 213464-77-8) is a broad‐spectrum pre‐ and post‐emergent rice herbicide developed by Isagro for the control of annual broadleaf and sedge weeds. It was sold in 2013 to Nihon Nohyaku Co., Ltd. and can be used also for sugarcane ripening.
The compound has been marketed since 2007 under the trade names “Kelion® 50 WG,” “Strada® WG,” and “Pivot® 50 WG” for early and middle post‐emergence application against susceptible weeds and sedges, such as A. theophrasti, Alisma plantago‐aquatica, A. lanceolatum, C. difformis, C. serotinus, Cyperus ferax, Cyperus iria, E. crus‐galli (red biotype), Heteranthera reniformis, Heteranthera rotundifolia, H. limosa, L. dubia, Schoenoplectus mucronatus, Bolboschoenus maritimus, Sagittaria sagittifolia, and Scirpus supinus at a use rate of 40–75 g a.i. ha−1.