938-91-0

Basic information

• Product Name: 1,3-dimethyl-1-phenylurea
• Synonyms: 1,3-dimethyl-1-phenylurea;1,3-Dimethyl-3-phenylurea
• CAS NO: 938-91-0
• Molecular Formula: C₉H₁₂N₂O
• Molecular Weight: 164.20438
• EINECS: 213-350-6
• Mol File: 938-91-0.mol
• Article Data: 3

Chemical Properties

• Melting Point: 81.5°C
• Boiling Point: 291.67°C (rough estimate)
• Flash Point: 153.3°C
• Appearance: /
• Density: 1.1062 (rough estimate)
• Vapor Pressure: 0.000173mmHg at 25°C
• Refractive Index: 1.5373 (estimate)
• CAS DataBase Reference: 1,3-dimethyl-1-phenylurea(CAS DataBase Reference)
• NIST Chemistry Reference: 1,3-dimethyl-1-phenylurea(938-91-0)
• EPA Substance Registry System: 1,3-dimethyl-1-phenylurea(938-91-0)

Safety Data

• Hazardous Substances Data: 938-91-0(Hazardous Substances Data)

Usage

General Description

1,3-dimethyl-1-phenylurea is a chemical compound with the molecular formula C10H12N2O. It is a white solid that is sparingly soluble in water and is mainly used as a herbicide, specifically as a plant growth regulator for cotton, rice, and other crops. It works by inhibiting the enzyme acetolactate synthase, leading to the disruption of the biosynthesis of the essential branched-chain amino acids valine, leucine, and isoleucine in plants. It is typically applied as a pre- and post-emergence treatment to control the growth of weeds and grasses in agricultural settings. However, it is important to handle and use 1,3-dimethyl-1-phenylurea with caution as it can be harmful if ingested, inhaled, or comes into contact with the skin.

InChI:InChI=1/C9H12N2O/c1-10-9(12)11(2)8-6-4-3-5-7-8/h3-7H,1-2H3,(H,10,12)

Upstream product

• 624-83-9 methyl isocyanate 
• 100-61-8 N-methylaniline 
• 62-53-3 aniline 
• 4285-42-1 N-phenyl-N-methylcarbamoyl chloride 
• 74-89-5 methylamine 

Downstream Products

• 72586-68-6 C₉H₁₁N₃O₂ 

Relevant articles and documents

Hydroxoiridium-Catalyzed Hydroalkylation of Terminal Alkenes with Ureas by C(sp3)?H Bond Activation

Direct alkylation of a methyl group, on di- and trisubstituted ureas, with terminal alkenes by C(sp3)?H bond activation proceeded in the presence of a hydroxoiridium/bisphosphine catalyst to give high yields of the corresponding addition products. The hydroxoiridium/bisphosphine complex generates an amidoiridium intermediate by reaction with ureas having an N?H bond.

Process for the preparation of urea derivatives

A process for the preparation of a urea derivative having the formula: STR1 in which A represents a straight- or branched-chain alkyl group having 1-20 carbon atoms, an aryl group, or a heterocyclic group, and each of R1 and R2 represents hydrogen, a straight- or branched-chain alkyl group having 1-20 carbon atoms, an alicyclic group, or an aryl groups, which comprises: reacting sodium salt of an N-halogenamide with a quaternary ammonium salt to obtain its addition salt and then, reacting said addition salt with an amine derivative in the absence or presence of an organic solvent.