2,6-dihydroxy-4-methylbenzaldehyde

EU law prohibits atranol in cosmetic products; the IFRA Standard on oakmoss extracts ties its restriction to atranol and chloroatranol. Its identity is PubChem’s.

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In your room

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molecule

The 2,6-dihydroxy-4-methylbenzaldehyde molecule

A computed 3D conformer , modeled, not a photograph of a molecule. PubChem CID 458186.

To place it in your room, open this page on an iPhone or iPad (AR Quick Look) or an Android phone (Google Scene Viewer). The files below open in any 3D viewer.

PubChem’s computed 3D conformer of 2,6-dihydroxy-4-methylbenzaldehyde (CID 458186, conformer 0006FDCA00000001): the shape a computer model gives the molecule, not an experimental structure and not a picture of a real molecule. Ball and stick: 8 carbon, 3 oxygen; the 8 hydrogen atoms are left out for clarity. The balls are drawn smaller than the atoms’ real reach; a double bond is two sticks, side by side.

In the room

scaled so that one ångström is 4 cm (about 400 million times life size): 21.5 cm tall, 28.7 cm across

Atoms

8 carbon, 3 oxygen · 11 bonds between them

Colours

carbon: ink sepia-2; oxygen: rose highlight; bonds: brass. Colour is a convention here and never carries the meaning alone: the letters on the drawing and this list say which atom is which.

Source

PubChem, CID 458186 (National Center for Biotechnology Information), its computed 3D conformer as filed on this record

Licence

PubChem’s data are public (NCBI); the model and its drawing were made for this site from those coordinates

The files GLB 22 KB · USDZ 48 KB · the drawing (SVG) 5 KB

The record

Each field carries its evidence: open a chip for the source, the quoted words and the confidence. A field with nothing behind it says so and stays empty.

Name

2,6-dihydroxy-4-methylbenzaldehyde

documented

2,6-Dihydroxy-4-Methylbenzaldehyde

PUBCHEM-458186 · PubChem Compound Summary for CID 458186, 2,6-Dihydroxy-4-Methylbenzaldehyde · read 2026-09-30

PubChem’s title, written in lower case like the IUPAC name (the quote is the title as PubChem prints it)

confidence A

CAS

526-37-4

documented

526-37-4

PUBCHEM-458186 · PubChem Compound Summary for CID 458186, 2,6-Dihydroxy-4-Methylbenzaldehyde · read 2026-09-30

among the CID’s PubChem synonyms, and PubChem resolves it back to this CID

confidence A

PubChem CID

458186

documented

PUBCHEM-458186 · PubChem Compound Summary for CID 458186, 2,6-Dihydroxy-4-Methylbenzaldehyde · read 2026-09-30

confidence A

Formula

C8H8O3

documented

PUBCHEM-458186 · PubChem Compound Summary for CID 458186, 2,6-Dihydroxy-4-Methylbenzaldehyde · read 2026-09-30

confidence A

Molecular weight

152.15

documented

PUBCHEM-458186 · PubChem Compound Summary for CID 458186, 2,6-Dihydroxy-4-Methylbenzaldehyde · read 2026-09-30

g/mol, as PubChem states it

confidence A

IUPAC name

2,6-dihydroxy-4-methylbenzaldehyde

documented

PUBCHEM-458186 · PubChem Compound Summary for CID 458186, 2,6-Dihydroxy-4-Methylbenzaldehyde · read 2026-09-30

confidence A

SMILES

CC1=CC(=C(C(=C1)O)C=O)O

documented

PUBCHEM-458186 · PubChem Compound Summary for CID 458186, 2,6-Dihydroxy-4-Methylbenzaldehyde · read 2026-09-30

confidence A

InChIKey

JASONGFGOLHLGB-UHFFFAOYSA-N

documented

PUBCHEM-458186 · PubChem Compound Summary for CID 458186, 2,6-Dihydroxy-4-Methylbenzaldehyde · read 2026-09-30

confidence A

Odour threshold

withheld: not on record

withheld

no odour-threshold source on record

Descriptors

not on record

not on record

no descriptor on record: no house wording on a data file, no descriptor source filed

Volatility class

not on record

not on record

no volatility class on record for atranol (the house’s volatility table has no entry)

Regulation

• IFRA Standard: Oakmoss extracts
• Regulation (EU) 2017/1410 (HICC, atranol and chloroatranol prohibited)

documented

IFRA-067, EU-2017-1410: each record above quotes its entry.

3D structure

PubChem computed 3D conformer · 19 atoms, 19 bonds

modeled

PUBCHEM-458186 · PubChem Compound Summary for CID 458186, 2,6-Dihydroxy-4-Methylbenzaldehyde · read 2026-09-30

PubChem’s computed 3D conformer (the 3D SDF record): a model, drawn schematically, not an experimental structure

confidence A

Wikidata

Q81985556

documented

P662 PubChem CID: 458186

WD-1 · Wikidata (Wikimedia Foundation) · read 2026-09-30

the item states PubChem CID 458186 (P662) and the record’s InChIKey (P235); found by the statement search haswbstatement:P662=458186

confidence A

Occurs in

• oakmoss absolute (oak moss extract)
  documented · no share

  a natural component of oak moss extract, as the Regulation’s recital states it (after the SCCS opinion of 2012)

  confidence A

In history

• HICC, atranol and chloroatranol prohibited in EU cosmetics, 2019

Sources

1. PUBCHEM-458186 · PubChem Compound Summary for CID 458186, 2,6-Dihydroxy-4-Methylbenzaldehyde (2,6-dihydroxy-4-methylbenzaldehyde). National Center for Biotechnology Information (NCBI), U.S. National Library of Medicine; live database, read 2026-09-30 through the PUG REST endpoints (no account): https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/526-37-4/cids/JSON · https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/cid/458186/property/MolecularFormula,MolecularWeight,IUPACName,Title,SMILES,InChIKey/JSON · https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/cid/458186/synonyms/JSON · https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/cid/458186/SDF?record_type=3d. pubchem.ncbi.nlm.nih.gov/compound/458186 · read 2026-09-30 · public domain (US government work, NCBI/NLM); acknowledgement requested , cite PubChem
2. EU-2017-1410 · Commission Regulation (EU) 2017/1410 of 2 August 2017 amending Annexes II and III to Regulation (EC) No 1223/2009. OJ L 202, 3.8.2017, p. 1. eur-lex.europa.eu/eli/reg/2017/1410/oj · read 2026-09-30 · EU reuse policy (Commission Decision 2011/833/EU): reuse for commercial or non-commercial purposes, with acknowledgement of the source
3. WD-1 · Wikidata (Wikimedia Foundation): the items named on each record (each statement read with its references), read 2026-09-30. www.wikidata.org · read 2026-09-30 · CC0 1.0

Our text and structure are CC BY 4.0; quoted source text stays under its owners’ terms.

this record as data: /data/molecule/atranol.json · version 3 · updated 2026-10-01 · confidence A