93-72-1 Usage
Description
2-(2,4,5-TRICHLOROPHENOXY)PROPIONIC ACID, also known as Silvex, is a synthetic auxin-type herbicide and plant growth regulator. It is a white crystalline solid with a chemical formula of C9H7Cl3O3. It is soluble in water and has a molecular weight of 255.51 g/mol. It is used to control broadleaf and woody plants in various agricultural and non-agricultural settings.
Uses
Used in Agriculture:
2-(2,4,5-TRICHLOROPHENOXY)PROPIONIC ACID is used as a herbicide for controlling broadleaf and woody plants in agricultural fields, such as rice fields, sugarcane, and orchards. It is effective in controlling weeds that compete with crops for nutrients, water, and sunlight, thereby improving crop yield and quality.
Used in Forestry:
2-(2,4,5-TRICHLOROPHENOXY)PROPIONIC ACID is used as a herbicide in forestry to control unwanted vegetation and promote the growth of desired tree species. It helps in maintaining the health and productivity of forests by eliminating invasive and competing plant species.
Used in Non-Agricultural Settings:
2-(2,4,5-TRICHLOROPHENOXY)PROPIONIC ACID is used as a herbicide in non-agricultural settings, such as lawns, gardens, and industrial areas, to control unwanted vegetation and maintain a clean and aesthetically pleasing environment.
However, it is important to note that the use of 2-(2,4,5-TRICHLOROPHENOXY)PROPIONIC ACID in rice fields, sugarcane, and orchards has been stopped by the EPA due to concerns about its potential environmental and health risks. Alternative herbicides and management practices are now being used to control weeds in these settings.
Reactivity Profile
A halogenated organic acid derivative. Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt. Carboxylic acids with six or fewer carbon atoms are freely or moderately soluble in water; those with more than six carbons are slightly soluble in water. Soluble carboxylic acid dissociate to an extent in water to yield hydrogen ions. The pH of solutions of carboxylic acids is therefore less than 7.0. Many insoluble carboxylic acids react rapidly with aqueous solutions containing a chemical base and dissolve as the neutralization generates a soluble salt. Carboxylic acids in aqueous solution and liquid or molten carboxylic acids can react with active metals to form gaseous hydrogen and a metal salt. Such reactions occur in principle for solid carboxylic acids as well, but are slow if the solid acid remains dry. Even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in 2-(2,4,5-TRICHLOROPHENOXY)PROPIONIC ACID to corrode or dissolve iron, steel, and aluminum parts and containers. Carboxylic acids, like other acids, react with cyanide salts to generate gaseous hydrogen cyanide. The reaction is slower for dry, solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Carboxylic acids, especially in aqueous solution, also react with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Their reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Like other organic compounds, carboxylic acids can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, carboxylic acids may initiate polymer
Hazard
Use has been restricted.
Health Hazard
Silvex is moderately toxic to test animals.The toxic effects are comparable to thoseof 2,4-D and 2,4,5-T. Oral or subcutaneousadministration in mice caused embryo toxi-city and fetal death. The oral LD50 value inrats is 650 mg/kg.
Health Hazard
INHALATION: Irritating to nose and throat. May cause nausea, vomiting, lethargy and incoordination. May cause kidney and liver damage. EYES: Irritation. May cause corneal injury or burn. SKIN: Irritation.
Fire Hazard
Special Hazards of Combustion Products: Hydrogen chloride may be liberated.
Safety Profile
A suspected
carcinogen. Poison by ingestion. An
experimental teratogen. When heated to
decomposition it emits toxic fumes of Cl-.
Check Digit Verification of cas no
The CAS Registry Mumber 93-72-1 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 9 and 3 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 93-72:
(4*9)+(3*3)+(2*7)+(1*2)=61
61 % 10 = 1
So 93-72-1 is a valid CAS Registry Number.
InChI:InChI=1/C9H7Cl3O3/c1-4(9(13)14)15-8-3-6(11)5(10)2-7(8)12/h2-4H,1H3,(H,13,14)/p-1/t4-/m1/s1
93-72-1Relevant articles and documents
Selenium analogs of phenoxypropionic and phenoxyacetic herbicides
Zakrzewski, Jerzy,Huras, Bogumi?a,Kie?czewska, Anna,Krawczyk, Maria
, p. 1005 - 1013 (2018/11/23)
Selenium analogs of phenoxyacetic herbicides, namely 2-(2,4-dichlorophenoxy)propionic acid (2,4-DP), 2-(2,4-dichlorophenoxy)acetic acid (2,4-D), 2-(4-chloro-2-methylphenoxy)propionic acid (MCPP), 2-(4-chloro-2-methylphenoxy)acetic acid (MCPA), 2-(2,4,5-trichlorophenoxy)propionic acid (2,4,5-TP), and 2-(2,4,5-trichlorophenoxy)acetic acid (2,4,5-T), were synthesized in two steps. Iodo aryl derivatives were dimerized with elemental selenium in the presence of CuO as catalyst to the corresponding diselenides. Diselenides were reduced with NaBH4 to a selenide anion and condensed with either propionic or chloroacetic acid to achieve the selenium analogs of phenoxyacetic herbicides. These selenium analogs show moderate herbicidal and fungistatic activity.
Salts of phosphonic acids
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, (2008/06/13)
New and valuable salts of phosphonic acids whose cationic components are ammonium radicals, agents for influencing the growth of plants with these salts, and a process for their manufacture.