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3,4-Dihydroxybenzaldehyde

CAS 139-85-5(HO)2C6H3CHOChemical Synthesis

3,4-Dihydroxybenzaldehyde (CAS: 139-85-5), also known as Protocatechualdehyde, is a key organic building block with the molecular formula (HO)2C6H3CHO and a molecular weight of 138.12 g/mol. This aromatic aldehyde, featuring two hydroxyl groups and one aldehyde group on a benzene ring, serves as a versatile intermediate in the synthesis of pharmaceuticals, agrochemicals, and flavour and fragrance compounds. Its specific substitution pattern makes it valuable for targeted chemical transformations.

IUPAC
Protocatechualdehyde
Synonyms
(HO)2C6H3CHOProtocatechualdehyde
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3,4-Dihydroxybenzaldehyde ((HO)2C6H3CHO) — chemical structure, CAS 139-85-5; Chemistry, fine chemical supplied by Tech Serve Solutions
AldehydesBuilding BlocksCarbonyl CompoundsChemical Synthesis
01 /Applications

Pharmaceutical Intermediates

3,4-Dihydroxybenzaldehyde is utilised as a starting material or intermediate in the synthesis of various active pharmaceutical ingredients (APIs). Its structure allows for diverse derivatisation to create complex drug molecules.

Agrochemical Synthesis

This compound finds application in the development and production of pesticides, herbicides, and other agrochemicals. Its functional groups enable its incorporation into molecules designed for crop protection.

Flavour and Fragrance Industry

As a precursor to certain flavour and fragrance compounds, 3,4-Dihydroxybenzaldehyde can be chemically modified to produce desirable aroma profiles.

Research and Development

It is widely employed in academic and industrial research labs as a building block for exploring novel organic compounds and synthetic methodologies.

02 /Properties
Molecular weight138.12
Linear formula(HO)2C6H3CHO
Gradepurum
Melting point150-157 °C(lit.)
03 /Safety & handling
GHS hazard pictogram: Harmful / irritant (GHS07)
Harmful / irritant
Warning

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 equipmentdust 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

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

04 /Identifiers & registry
CAS number
139-85-5
MDL number
MFCD00003370
PubChem substance
24863372
Beilstein registry
774381
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 3,4-Dihydroxybenzaldehyde used for?

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3,4-Dihydroxybenzaldehyde is primarily used as an intermediate in the synthesis of pharmaceuticals, agrochemicals, and flavour and fragrance compounds, as well as in general organic synthesis and research.

What is the CAS number and molecular formula for 3,4-Dihydroxybenzaldehyde?

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The CAS number is 139-85-5 and the molecular formula is (HO)2C6H3CHO.

What grade and purity does Tech Serve Solutions supply?

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Tech Serve Solutions supplies 3,4-Dihydroxybenzaldehyde in 'purum' grade. TSS does not represent this product as USP, BP, EP, or any other pharmacopoeia grade unless explicitly stated.

How should 3,4-Dihydroxybenzaldehyde be handled?

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Handle 3,4-Dihydroxybenzaldehyde with appropriate personal protective equipment including a dust mask type N95 (US), eyeshields, and gloves. Ensure adequate ventilation to avoid inhaling dust. It is classified as causing skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335).

Is 3,4-Dihydroxybenzaldehyde a controlled substance?

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The provided data does not indicate that 3,4-Dihydroxybenzaldehyde is a controlled substance.

How is 3,4-Dihydroxybenzaldehyde typically packed and shipped?

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Products are packed according to industry standards to ensure safe transport. As a global supplier, Tech Serve Solutions exports chemicals worldwide, adhering to all relevant shipping regulations.

How can I request a sample or quote for 3,4-Dihydroxybenzaldehyde?

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To request a sample or a formal quotation, please contact the Tech Serve Solutions sales team via our website or by telephone, providing your specific requirements.

Need 3,4-Dihydroxybenzaldehyde in a specific grade or volume?