4-Hydroxybenzaldehyde
4-Hydroxybenzaldehyde (CAS: 123-08-0, Formula: HOC6H4CHO) is a versatile organic compound with a molecular weight of 122.12 g/mol. It is characterised by its aldehyde and phenol functional groups, making it a valuable intermediate in various chemical syntheses. Primarily, it serves as a key starting material in the production of polymers and pharmaceutical compounds, contributing to diverse industrial applications.
- Synonyms
- 4-Hydroxybenzaldehyde

Polymer Synthesis
4-Hydroxybenzaldehyde is employed as a monomer or intermediate in the synthesis of specialty polymers. Its structure allows for incorporation into polymer backbones, influencing material properties for advanced applications.
Pharmaceutical Intermediates
This compound is a crucial building block for synthesizing active pharmaceutical ingredients (APIs) and other complex organic molecules used in drug development. Its reactivity facilitates the creation of diverse pharmaceutical structures.
Organic Synthesis
As a functionalised aromatic aldehyde, 4-Hydroxybenzaldehyde is widely used in general organic synthesis for creating a broad range of target molecules and fine chemicals.
| Molecular weight | 122.12 |
|---|---|
| Linear formula | HOC6H4CHO |
| Assay | 98% |
| Application | Widely used starting material for polymers and pharmaceuticals. |
| Melting point | 112-116 °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) | 2 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 4-Hydroxybenzaldehyde used for?
+
4-Hydroxybenzaldehyde is widely used as a starting material for polymers and pharmaceuticals, and in general organic synthesis.
What are the CAS number and formula for 4-Hydroxybenzaldehyde?
+
The CAS number is 123-08-0 and the linear formula is HOC6H4CHO.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies 4-Hydroxybenzaldehyde with an assay of 98%. This product is supplied for research and manufacturing purposes and is not represented as USP, BP, EP, or other pharmacopoeia grades.
How should 4-Hydroxybenzaldehyde be handled safely?
+
4-Hydroxybenzaldehyde can cause skin irritation, serious eye irritation, and respiratory irritation. Handle with appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, and gloves. Ensure adequate ventilation.
Is 4-Hydroxybenzaldehyde a controlled substance?
+
Based on the provided data, 4-Hydroxybenzaldehyde (CAS: 123-08-0) is not listed as a controlled substance.
How is 4-Hydroxybenzaldehyde packed and shipped?
+
Tech Serve Solutions exports fine chemicals globally. Specific packaging details for 4-Hydroxybenzaldehyde will be confirmed upon order, adhering to international shipping regulations.
How can I request a quote or sample for 4-Hydroxybenzaldehyde?
+
To request a quote or sample of 4-Hydroxybenzaldehyde, please use the contact form on our website or reach out to our sales team directly.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis