2,4-Dichlorobenzoic acid

Price	USD1.00
Packge	1kg

Product Details

Product Name 2,4-Dichlorobenzoic acid
CAS No.50-84-0
EINECS No.200-067-8
MFC7H4Cl2O2
MW191.01
InChIKeyATCRIUVQKHMXSH-UHFFFAOYSA-N
AppearancePowderWhite to almost white
Melting point 157-160 °C (lit.)
Water Solubility 0.36 g/L (15 ºC)
Boiling point 200 °C
storage temp. Sealed in dry,Room Temperature
density 1.4410 (rough estimate)

2,4-Dichlorobenzoic acid Basic information

Product Name:	2,4-Dichlorobenzoic acid
Synonyms:	Benzoic acid,2,4-dichloro- (8CI,9CI);2,4-Dichlorbenzoic a;2,4-Dichlorobenzoic acid, 98% 100GR;2,4-Dichlorobenzoic acid, 98% 5GR;Dichlorbenzoic aci;2,4- twochlorobenzoic acid;2, 4 - dichlorobenzene forMic acid;2.4-Dichlorobe
CAS:	50-84-0
MF:	C7H4Cl2O2
MW:	191.01
EINECS:	200-067-8
Product Categories:	C7;Carbonyl Compounds;Carboxylic Acids;Alpha sort;D;DAlphabetic;DIA - DIC;Pesticides&Metabolites;acid;Building Blocks;Carbonyl Compounds;Carboxylic Acids;Chemical Synthesis;Organic Building Blocks;Aromatic Carboxylic Acids, Amides, Anilides, Anhydrides & Salts;Organic acids
Mol File:	50-84-0.mol

2,4-Dichlorobenzoic acid Chemical Properties

Melting point	157-160 °C(lit.)
Boiling point	200 °C
density	1.4410 (rough estimate)
refractive index	1.4590 (estimate)
storage temp.	Store below +30°C.
solubility	ethanol: soluble1g/10 mL, clear, colorless
form	Powder
color	White to almost white
PH	2.8 (0.36g/l, H2O, 15℃)
Water Solubility	0.36 g/L (15 ºC)
BRN	1868192
Stability:	Stable. Incompatible with strong oxidizing agents.
CAS DataBase Reference	50-84-0(CAS DataBase Reference)
NIST Chemistry Reference	2,4-Dichlorobenzoic acid(50-84-0)
EPA Substance Registry System	Benzoic acid, 2,4-dichloro-(50-84-0)

Safety Information

Hazard Codes	Xn,Xi
Risk Statements	22-36/37/38
Safety Statements	26-36-37/39-22
WGK Germany	3
RTECS	DG6650000
Hazard Note	Irritant
TSCA	Yes
HS Code	29163900

2,4-Dichlorobenzoic acid Usage And Synthesis

Chemical Properties	white powder
Uses	2,4-Dichlorobenzoic Acid is a di-halogenated benzoic acid derivative and an intermediate in the synthesis of spirodiclofen (S682990), a tetronic acid acaricide fungicide used in controlling red mites.
Definition	ChEBI: A chlorobenzoic acid that is benzoic acid in which the ring hydrogens at positions 2 and 4 are substituted by chloro groups.
General Description	White to slightly yellowish powder.
Air & Water Reactions	Insoluble in water.
Reactivity Profile	2,4-Dichlorobenzoic acid is a halogenated carboxylic acid. 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 2,4-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 Hazard	Flash point data for 2,4-Dichlorobenzoic acid are not available; however, 2,4-Dichlorobenzoic acid is probably combustible.
Purification Methods	Crystallise the acid from aqueous EtOH (charcoal), then *benzene (charcoal). It can also be recrystallised from water. [Beilstein 9 IV 998.] It can be freed from isomeric acids (to <0.05%) via the (±)--methylbenzylamine salt as follows: dissolve the dichloro-acid (10g, 50.2mmol) in isopropanol (200mL), heat to 60o and add the (±)-benzylamine (5.49g, 45.3mmol), then stir it at 60o for 1hour. Cool the mixture to room temperature, filter the slurry, wash it with isopropanol (25mL) and dry it in vacuo at 40o overnight to give 79% of the salt with m 185.2o. Dissolve the salt (5g) in H2O (50mL) and MeOH (20mL), then heat to 60o and add concentrated HCl to pH <2.0. Cool the solution to room temperature add H2O (12mL), filter it, wash it with H2O (30mL) and dry it in vacuo at 40o overnight to give 94% of the acid with m 162.0o. [Ley & Yates Organic Process Research & Development 12 120 2008.]

Company Profile Introduction

Henan CoreyChem Co., Ltd, based on the original Zhengzhou Cote Chemical Research Institute, be brave in absorbing highly educated talents & overseas returnees; actively responded to Zhengzhou City High-tech Zone Government’s Special Care Policy, reorganized and founded in National University of Science and Technology Park, which is a high-tech, stock enterprise of high-end chemical Custom synthesis;The park was created by the People's Government of Henan Province, and proved by Ministry of Education and the National Science & Technology, taking the construction mode of "many college a park, and common development", mainly depends on Zhengzhou University and Henan University’s scientific research and talent advantage to set up Universities, scientific research institute and enterprise scientific research achievements transformation platform, to make high-tech enterprises incubate, is the new high-tech talent gathering base, high and new technology industry enterprise radiation base, colleges and universities technological innovation base.

Henan Coreychem Co., Ltd, facing global High-tech pharmaceutical raw materials, high complex new type intermediates, fine chemicals custom synthesis, scale-up production and Rare chemicals trade. Corey have well-equipped machine, strong technical force and considerate marketing team service. We also have rich experience advantage in basic research, small scale process development, scale-up, industrial technology development & production and cost control.

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