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2,5-Dichlorobenzoic acid

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CAS:50-79-3
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CAS:50-79-3
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CAS:50-79-3
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2,5-Dichlorobenzoic acid Basic information
Product Name:2,5-Dichlorobenzoic acid
Synonyms:2,5-Dichlorobenzoic a;2,5-DICHLOROBENZOIC ACID;RARECHEM AL BO 0355;2,5-dichloro-benzoicaci;1,2-DICHLOROBENZENE PESTANAL;2,5-Dichlorobenzoic acid, 98+%;Irsogladine Impurity S;Benzoic acid, 2,5-dichloro-
CAS:50-79-3
MF:C7H4Cl2O2
MW:191.01
EINECS:200-065-7
Product Categories:-;Aromatic Carboxylic Acids, Amides, Anilides, Anhydrides & Salts;Phenylacetic acid;Organic acids;Acids & Esters;Chlorine Compounds;DAlphabetic;Alpha sort;D;DIA - DIC;Pesticides&Metabolites;C7;Carbonyl Compounds;Carboxylic Acids;intermediate
Mol File:50-79-3.mol
2,5-Dichlorobenzoic acid Structure
2,5-Dichlorobenzoic acid Chemical Properties
Melting point 151-154 °C(lit.)
Boiling point 301 °C(lit.)
density 1.4410 (rough estimate)
refractive index 1.4590 (estimate)
Fp 300-302°C
storage temp. Store below +30°C.
solubility 0.8g/l
form Powder
color White to beige
Water Solubility <0.1 g/100 mL at 19 ºC
BRN 973353
Stability:Stable.
CAS DataBase Reference50-79-3(CAS DataBase Reference)
NIST Chemistry ReferenceBenzoic acid, 2,5-dichloro-(50-79-3)
EPA Substance Registry SystemBenzoic acid, 2,5-dichloro-(50-79-3)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 26-36-24/25
WGK Germany 3
RTECS DG6825000
TSCA Yes
HS Code 29163900
MSDS Information
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2,5-Dichlorobenzoic acid English
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ACROS English
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2,5-Dichlorobenzoic acid Usage And Synthesis
Chemical Propertieswhite crystalline powder
DefinitionChEBI: A chlorobenzoic acid that is benzoic acid in which the ring hydrogens at positions 2 and 5 are substituted by chloro groups.
General DescriptionNeedles (from water) or white powder.
Air & Water ReactionsInsoluble in water.
Reactivity ProfileCarboxylic 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 2,5-Dichlorobenzoic 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 polymerization reactions; like other acids, they often catalyze (increase the rate of) chemical reactions.
Fire HazardFlash point data for 2,5-Dichlorobenzoic acid are not available; however, 2,5-Dichlorobenzoic acid is probably combustible.
Purification MethodsCrystallise the acid from water. [Beilstein 9 IV 1005.] Aromatic acid impurities (to <0.05%) can be removed via the (±)--methylbenzylamine salt as described for 2,4-dichlorobenzoic acid [Ley & Yates Organic Process Research & Development 12 120 2008.]
2,5-Dichlorobenzoic acid Preparation Products And Raw materials
Preparation ProductsIrsogladine
Raw materialsPotassium permanganate-->Paraformaldehyde-->1,2,4-Trichlorobenzene-->p-Dichlorobenzene-->2,5-DICHLOROBENZOYL CHLORIDE-->2,5-Dichlorobenzonitrile
Tag:2,5-Dichlorobenzoic acid(50-79-3) Related Product Information
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