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2,4-Dichlorobenzoic acid

CAS No.
50-84-0
Chemical Name:
2,4-Dichlorobenzoic acid
Synonyms
2,4-DCBA;2,4-Dichlorobenzoic;2,4-Dichlolrobenzoic Acid;Benzoic acid, 2,4-dichloro-;'LGC' (1305);2.4-Dichlorobe;orbenzoic acid;AKOS BBS-00003747;Dichlorbenzoic aci;RARECHEM AL BO 0324
CBNumber:
CB9255955
Molecular Formula:
C7H4Cl2O2
Molecular Weight:
191.01
MDL Number:
MFCD00002414
MOL File:
50-84-0.mol
MSDS File:
SDS
Last updated:2024-12-18 14:15:32

2,4-Dichlorobenzoic acid Properties

Melting point 157-160 °C (lit.)
Boiling point 200 °C
Density 1.4410 (rough estimate)
refractive index 1.4590 (estimate)
storage temp. Sealed in dry,Room Temperature
solubility ethanol: soluble1g/10 mL, clear, colorless
pka 2.68±0.25(Predicted)
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)
EWG's Food Scores 2
FDA UNII 0SR0320D45
NIST Chemistry Reference 2,4-Dichlorobenzoic acid(50-84-0)
EPA Substance Registry System Benzoic acid, 2,4-dichloro- (50-84-0)

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
GHS07
Signal word  Warning
Hazard statements  H302-H315-H319-H335
Precautionary statements  P261-P264-P270-P301+P312-P302+P352-P305+P351+P338
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
NFPA 704
1
2 0

2,4-Dichlorobenzoic acid price More Price(38)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 139572 2,4-Dichlorobenzoic acid 98% 50-84-0 5g $36.4 2024-03-01 Buy
Sigma-Aldrich 139572 2,4-Dichlorobenzoic acid 98% 50-84-0 100g $40.1 2024-03-01 Buy
TCI Chemical D0337 2,4-Dichlorobenzoic Acid >97.0%(GC)(T) 50-84-0 25g $16 2024-03-01 Buy
TCI Chemical D0337 2,4-Dichlorobenzoic Acid >97.0%(GC)(T) 50-84-0 500g $73 2024-03-01 Buy
Alfa Aesar A12372 2,4-Dichlorobenzoic acid, 98% 50-84-0 250g $37.65 2024-03-01 Buy
Product number Packaging Price Buy
139572 5g $36.4 Buy
139572 100g $40.1 Buy
D0337 25g $16 Buy
D0337 500g $73 Buy
A12372 250g $37.65 Buy

2,4-Dichlorobenzoic acid Chemical Properties,Uses,Production

Chemical Properties

white powder

Uses

2,4-Dichlorobenzoic acid is used as reagent during the synthesis of pyrimido[2?,1?:2,3]thiazolo[4,5-b]quinoxaline derivatives. It is also used as starting reagent during the synthesis of 1-(substituted)-1,4-dihydro-6-nitro-4-oxo-7-(sub-secondary amino)-quinoline-3-carboxylic acids.

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.]

Global( 559)Suppliers
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View Lastest Price from 2,4-Dichlorobenzoic acid manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
2,4-Dichlorobenzoic acid pictures 2024-12-25 2,4-Dichlorobenzoic acid
50-84-0
US $10.00 / KG 1KG 99% 300MT/year Speranza Chemical Co., Ltd.
2,4-Dichlorobenzoic acid pictures 2024-11-20 2,4-Dichlorobenzoic acid
50-84-0
US $1.00 / KG 1KG 99% 10 mt Hebei Weibang Biotechnology Co., Ltd
2,4-Dichlorobenzoic acid pictures 2024-10-11 2,4-Dichlorobenzoic acid
50-84-0
US $9.00 / KG 1KG 99.9 1 ton Hebei Chuanghai Biotechnology Co,.LTD
TETRASUL PESTANAL (2,4,4',5-TETRA- CHLOR 2,4-Dichlorobenzoicacid,98% 2,4-Dichlorobenzoic acid, 98% 100GR 2,4-Dichlorobenzoic acid, 98% 5GR Benzoic acid,2,4-dichloro- (8CI,9CI) 2,4-Dichlorbenzoic a 2,4- twochlorobenzoic acid 2, 4 - dichlorobenzene forMic acid 2.4-Dichlorobe 2,4-dichloro-benzoicaci AKOS BBS-00003747 2,4-DICHLOROBENZOIC ACID 2,4-Dichlorbenzoic acid Dichlorbenzoic aci 'LGC' (1305) RARECHEM AL BO 0324 Furosemide EP Impurity E Furosemide Impurity 5(Furosemide EP Impurity E) 2,4-Dichlorobenzyl alcohol EP Impurity E 2,4-Dichlorobenzoic Acid > furosemide iMpurit E orbenzoic acid Furosemide Impurity E(EP) 2,4-Dichlolrobenzoic Acid 2,4-Dichlorobenzoic Benzoic acid, 2,4-dichloro- 2,4-DCBA 2,4-Dichlorobenzoic Acid 98% For Synthesis 50-84-0 50-48-0 Carbonyl Compounds Carboxylic Acids C7 Building Blocks Organic Building Blocks C7 Carbonyl Compounds Carboxylic Acids Alpha sort D DAlphabetic DIA - DIC Pesticides&Metabolites Organic acids Aromatic Carboxylic Acids, Amides, Anilides, Anhydrides & Salts Building Blocks Carbonyl Compounds Carboxylic Acids Chemical Synthesis Organic Building Blocks acid bc0001 1