3,5-Dichlorobenzoic acid
3,5-Dichlorobenzoic acid (CAS 51-36-5) is a chlorinated aromatic carboxylic acid with the molecular formula C7H4Cl2O2 and a molecular weight of 191.01 g/mol. This compound serves as a valuable intermediate and building block in organic synthesis. It is primarily utilised in the chemical industry for the preparation of more complex molecules and is a key component in various research and development activities.
- Synonyms
- 3,5-Dichlorobenzoic acid3,5-Dichlorobenzoic acidCl2C6H3CO2H

Organic Synthesis Intermediate
3,5-Dichlorobenzoic acid is widely employed as a precursor in the synthesis of diverse organic compounds. Its dichlorinated structure allows for specific reactions in the development of pharmaceuticals, agrochemicals, and specialty materials.
Chemical Research and Development
This compound is frequently used in academic and industrial research laboratories for exploring new synthetic pathways and developing novel chemical entities. Its defined structure makes it a reliable starting material for various chemical transformations.
Building Block for Complex Molecules
As a functionalised aromatic molecule, it acts as a crucial building block in constructing larger, more complex molecular architectures. The carboxylic acid group and chlorine substituents offer sites for further chemical modification.
| Molecular weight | 191.01 |
|---|---|
| Linear formula | Cl2C6H3CO2H |
| Assay | 97% |
| Melting point | 184-187 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-37/39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 3,5-Dichlorobenzoic acid used for?
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3,5-Dichlorobenzoic acid is primarily used as an intermediate and building block in organic synthesis, particularly in the development of pharmaceuticals, agrochemicals, and other specialty chemicals. It is also utilised in chemical research and development.
What is the CAS number and formula for 3,5-Dichlorobenzoic acid?
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The CAS number for 3,5-Dichlorobenzoic acid is 51-36-5, and its linear formula is Cl2C6H3CO2H.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3,5-Dichlorobenzoic acid with an assay of 97%. This product is suitable for research and chemical synthesis purposes and is not represented as USP, BP, or EP grade.
How should 3,5-Dichlorobenzoic acid be handled?
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Handling should be done with appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, and gloves. Ensure adequate ventilation to avoid inhalation of dust. This compound is classified as an irritant to skin, eyes, and the respiratory tract (H315, H319, H335).
Is 3,5-Dichlorobenzoic acid a controlled substance?
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The provided data does not indicate that 3,5-Dichlorobenzoic acid is a controlled substance.
How is 3,5-Dichlorobenzoic acid packed and shipped?
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Tech Serve Solutions can supply 3,5-Dichlorobenzoic acid for export. Packaging details will be confirmed upon order and are designed to ensure safe transit.
How can I request a quote or sample for 3,5-Dichlorobenzoic acid?
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To request a quote or sample, please contact our sales team through the website or by phone, providing the product name and CAS number (51-36-5).
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