# 4-Hydroxybenzaldehyde (CAS 123-08-0)

**CAS:** 123-08-0  
**PubChem CID:** [126](https://pubchem.ncbi.nlm.nih.gov/compound/126)  
**Molecular formula:** C7H6O2  
**Molar mass:** 122.12 g/mol  
**IUPAC:** 4-hydroxybenzaldehyde  
**SMILES:** `C1=CC(=CC=C1C=O)O`  
**InChIKey:** `RGHHSNMVTDWUBI-UHFFFAOYSA-N`  
**InChI:** `InChI=1S/C7H6O2/c8-5-6-1-3-7(9)4-2-6/h1-5,9H`  

## Physicochemical properties

| Parameter | Value |
|---|---|
| logP (XLogP3) | 1.4 |
| PSA | 37.3 Ų |
| Hydrogen bond donors | 1 |
| Hydrogen bond acceptors | 2 |
| Rotatable bonds | 1 |
| Heavy atoms | 9 |

## Available in the shop

[4-Hydroxybenzaldehyde (CAS 123-08-0) — Shanxi Hyd](https://molgod.org/sds-cards/4-hydroxybenzaldehyde-cas-123-08-0-shanxi-hyd/)

## Data sources

- [PubChem CID 126](https://pubchem.ncbi.nlm.nih.gov/compound/126)
- [NIST WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=123-08-0)
- [ChEMBL](https://www.ebi.ac.uk/chembl/g/#search_results/all/query=123-08-0)

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*Last updated: 2026-09-02 · Generator: MOL-GOD v3.12.33*