93-72-1 Usage
Chemical Properties
slightly beige crystalline powder
Uses
Different sources of media describe the Uses of 93-72-1 differently. You can refer to the following data:
1. Herbicide and plant growth regulator.
2. Silvex was formerly used as a herbicide. Itsuse in rice fields, sugarcane, and orchards hasbeen stopped by the EPA.
General Description
White powder. Sinks and mixes slowly with water.
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
Different sources of media describe the Health Hazard of 93-72-1 differently. You can refer to the following data:
1. 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.
2. 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
-
, (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.
