3-Fluoro-4-methoxybenzoic acid

CAS 403-20-3FC6H3(OCH3)CO2HChemical Synthesis

3-Fluoro-4-methoxybenzoic acid (CAS: 403-20-3) is a fluorinated aromatic carboxylic acid with the formula FC6H3(OCH3)CO2H and a molecular weight of 170.14 g/mol. This compound serves as a valuable building block in organic synthesis, particularly in the development of novel pharmaceuticals and agrochemicals. Its specific substitution pattern makes it useful for introducing fluoro-methoxy-phenyl moieties into target molecules.

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3-Fluoro-4-methoxybenzoic acid (FC6H3(OCH3)CO2H) — chemical structure, CAS 403-20-3; Chemistry, fine chemical supplied by Tech Serve Solutions

Building BlocksC7-C8Carbonyl CompoundsCarboxylic AcidsChemical SynthesisFluorinated Building BlocksOrganic Building Blocks

01 /Applications

Pharmaceutical Intermediate

Utilised in the synthesis of active pharmaceutical ingredients (APIs), contributing its unique structural features to the final drug molecule. Its fluorinated nature can influence metabolic stability and binding affinity.

Agrochemical Development

Serves as a precursor for the creation of new pesticides, herbicides, and fungicides. The fluorine atom can enhance biological activity and environmental persistence profiles of agrochemical products.

Material Science Research

Employed in the development of advanced materials, where its structure can impart specific electronic or physical properties. It is a key component in synthesising specialised polymers or organic electronic materials.

Organic Synthesis Building Block

A versatile reagent for introducing a 3-fluoro-4-methoxyphenyl group into complex organic structures. It is commonly used in cross-coupling reactions and other functional group transformations.

02 /Properties

Molecular weight	170.14
Linear formula	FC6H3(OCH3)CO2H
Assay	98%
Melting point	211-213 °C(lit.)

03 /Safety & handling

Protective equipment	Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
Water hazard class (WGK, DE)	3

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

403-20-3

MDL number

MFCD00060675

PubChem substance

24862480

05 /Quality & supply

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.

06 /Frequently asked questions

What is 3-Fluoro-4-methoxybenzoic acid used for?

3-Fluoro-4-methoxybenzoic acid is primarily used as a building block in organic synthesis for the development of pharmaceuticals, agrochemicals, and advanced materials. Its structure is valuable for introducing specific fluoro-methoxy-phenyl motifs into target molecules.

What is the CAS number and molecular formula for 3-Fluoro-4-methoxybenzoic acid?

The CAS number is 403-20-3, and the molecular formula is FC6H3(OCH3)CO2H.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies 3-Fluoro-4-methoxybenzoic acid with an assay of 98%. We do not represent this product as USP, BP, or EP grade; it is supplied for research and laboratory use.

What are the safety and handling considerations for 3-Fluoro-4-methoxybenzoic acid?

Handle 3-Fluoro-4-methoxybenzoic acid with appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter should be used. Ensure good ventilation during handling. It has a WGK Germany rating of 3, indicating a high degree of hazard.