4032-26-2

Basic information

• Product Name: diquat dichloride
• Synonyms: 9,10-dihydro-8a,10a-diazoniaphenanthrene dichloride; 6,7-dihydrodipyrido[1,2-a:2',1'-c]pyrazinediium dichloride
• CAS NO: 4032-26-2
• Molecular Formula: C₁₂H₁₂N₂*2Cl
• Molecular Weight: 255.1431
• EINECS: 223-714-6 [2]
• Mol File: 4032-26-2.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: diquat dichloride(CAS DataBase Reference)
• NIST Chemistry Reference: diquat dichloride(4032-26-2)
• EPA Substance Registry System: diquat dichloride(4032-26-2)

Safety Data

• Hazardous Substances Data: 4032-26-2(Hazardous Substances Data)

Usage

General Description

Diquat dichloride is a non-selective herbicide and desiccant commonly used to control aquatic weeds, terrestrial weeds, and algae in various agricultural and non-agricultural settings. It is a contact herbicide, meaning it only affects the parts of the plant that come into direct contact with the chemical. Diquat works by disrupting the photosynthesis process in plants, leading to rapid wilting and desiccation. It is often used to control weeds in areas such as rice paddies, orchards, and industrial sites, and is also used as a pre-harvest desiccant for crops such as potatoes, sunflowers, and soybeans. However, diquat dichloride is highly toxic to aquatic organisms and should be used with caution to minimize environmental impact. Personal protective equipment and proper handling procedures are important when using diquat dichloride to ensure safety and minimize harm to non-target organisms.

Upstream product

• 366-18-7 [2,2]bipyridinyl 
• 85-00-7 diquat dibromide 

Relevant articles and documents

Green preparation method of diquat anionic salt

The invention belongs to the technical field of chemistry, and discloses a green preparation method of diquat anionic salt. The method comprises the following steps of performing reaction on diquat dibromide mother liquid and oxidization agents in the presence of hydrochloric acid or sulfuric acid to obtain reaction liquid containing diquat dichloride or diquat hydrosulfate; filtering reaction liquid; performing pH regulation and concentration treatment on filter liquid to obtain diquat dichloride mother liquid or diquat hydrosulfate mother liquid; mixing filter cake with organic solvents; introducing ethylene for reaction until the system pressure is unchanged; filtering reaction liquid to obtain filter liquid containing 1,2-dibromoethane and diquat dibromide solid; performing washing anddrying on the diquat dibromide; preparing diquat dibromide mother liquid; recovering filter liquid to obtain 1,2-dibromoethane; performing dipyridyl reaction to prepare diquat dibromide. The method provided by the invention is simple, and is suitable for industrial production; the cationic loss rate is lower than 0.5 percent; the bromine recovery rate is higher than 96 percent, so that the cyclicutilization of bromine is realized; the bromine waste is avoided.

Free-energy dependence of electron-transfer rate constants at Si/liquid interfaces

The interfacial energetics and kinetics of n-type Si electrodes in contact with a series of one-electron, outer-sphere redox couples were investigated using the differential capacitance vs potential and current density vs potential measurements, respectively. The differential capacitance vs potential measurements were essentially independent of the ac frequency imposed on the interface, with linear Bode plots between ≈103 and ≈105 Hz. The current density vs potential plots exhibited first-order kinetic dependence on the concentration of electrons at the semiconductor surface and a first-order kinetic dependence on the concentration of acceptors in the solution.