3,5-Dichlorobenzoic acid

3,5-Dichlorobenzoic acid
  • CAS No.:51-36-5

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  1. This product is a chemical product/pharmaceutical intermediate. It is not a drug, an active pharmaceutical ingredient (API), or a pharmaceutical-grade material. It has not been granted a drug approval number or a Chemical Drug Substance Approval Notice, has not passed drug-related review and approval, and is not manufactured, tested, or released in accordance with pharmaceutical GMP.
  2. This product is intended solely for non-clinical research, process development, quality studies, further chemical processing, or chemical synthesis. It must not be used in drug-product manufacturing, clinical trials, clinical diagnosis, or administration to humans or animals, or be sold, used as an input, submitted for regulatory filing, or released as an API or pharmaceutical material.
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3,5-Dichlorobenzoic acid Basic information
Product Name:3,5-Dichlorobenzoic acid
Synonyms:BENZOIC ACID, 3,5-DICHLORO-;BUTTPARK 45\07-34;RARECHEM AL BO 0040;3.5-Dichlorobe;3, 5-Dichlorobenzoic acid, MTBE;3,5-Dichlorobenzoic Acid Standard;3,5-Dichlorobenzoic acid Solution, 100ppm;3,5-Dichlorobenzoic Acid, 97+%
CAS:51-36-5
MF:C7H4Cl2O2
MW:191.01
EINECS:200-092-4
Product Categories:Building Blocks;Carbonyl Compounds;FINE Chemical & INTERMEDIATES;Carboxylic Acids;Chemical Synthesis;Organic Building Blocks;Aromatic Carboxylic Acids, Amides, Anilides, Anhydrides & Salts;Organic acids;C7;Alpha sort;D;DAlphabetic;DIA - DIC;Pesticides&Metabolites;Carbonyl Compounds;Carboxylic Acids;500 Series Drinking Water Methods;DIA - DICEPA;Method 552;Volatiles/ Semivolatiles;bc0001
Mol File:51-36-5.mol
3,5-Dichlorobenzoic acid Chemical Properties
Melting point 184-187 °C (lit.)
Boiling point 273.68°C (rough estimate)
density 1.4410 (rough estimate)
refractive index 1.4590 (estimate)
storage temp. Sealed in dry,Room Temperature
pka3.46±0.10(Predicted)
form powder to crystal
color White to Almost white
Water Solubility 147.1mg/L(temperature not stated)
BRN 2044776
InChIKeyCXKCZFDUOYMOOP-UHFFFAOYSA-N
CAS DataBase Reference51-36-5(CAS DataBase Reference)
NIST Chemistry Reference3,5-Dichlorobenzoic acid(51-36-5)
EPA Substance Registry System3,5-Dichlorobenzoic acid (51-36-5)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 26-37/39
WGK Germany 3
RTECS DG7350000
HazardClass IRRITANT
HS Code 29163990
MSDS Information
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3,5-Dichlorobenzoic acid English
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3,5-Dichlorobenzoic acid Usage And Synthesis
Chemical PropertiesWhite to beige powder
Uses3,5-Dichlorobenzoic acid is used in organic synthesis and pesticide and pharmaceutical intermediates. It can be used to synthesize 3,5-Dichloro-N-(4-hydroxyphenethyl)benzamide and (3,5-Dichlorophenyl)-(4-fluorophenyl)methanone.
DefinitionChEBI: 3,5-dichlorobenzoic acid is a chlorobenzoic acid that is benzoic acid in which the ring hydrogens at positions 3 and 5 are substituted by chloro groups. It has a role as a herbicide and a metabolite. It is a chlorobenzoic acid and a dichlorobenzene. It derives from a benzoic acid. It is a conjugate acid of a 3,5-dichlorobenzoate.
PreparationSynthesis of 3,5-dichlorobenzoic acid: 200 parts of ethanol is slowly added to a solution, heated to 70°C, of the diazonium salt prepared as described in Example 1 from 412 parts of 3,5-dichloroanthranilic acid; elimination of nitrogen immediately takes place with evolution of heat. The mixture is stirred for another 15 minutes and 350 parts (92% of theory) of 3,5-dichlorobenzoic acid having a melting point of 176° to 178°C is isolated as described in Example 1.
Synthesis Reference(s)Journal of the American Chemical Society, 73, p. 455, 1951 DOI: 10.1021/ja01145a145
Purification MethodsCrystallise the acid from EtOH and sublime it in a vacuum. [Beilstein 9 IV 1008.] 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.]

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