α-terpineol

No share is given: the record names the molecule and measures nothing.

Read the essay · The material

In your room

A model you can turn here or place in your room with a phone. Nothing is fetched until you ask; nothing is stored or sent. Everything you can place in a room.

molecule

The α-terpineol molecule

A computed 3D conformer , modeled, not a photograph of a molecule. PubChem CID 17100.

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 α-terpineol (CID 17100, conformer 000042CC00000001): the shape a computer model gives the molecule, not an experimental structure and not a picture of a real molecule. Ball and stick: 10 carbon, 1 oxygen; the 18 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): 13.1 cm tall, 28.9 cm across

Atoms

10 carbon, 1 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 17100 (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 21 KB · USDZ 47 KB · the drawing (SVG) 4 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

α-terpineol

documented

Alpha-Terpineol

PUBCHEM-17100 · PubChem Compound Summary for CID 17100, Alpha-Terpineol · read 2026-09-30

confidence A

CAS

98-55-5

documented

98-55-5

PUBCHEM-17100 · PubChem Compound Summary for CID 17100, Alpha-Terpineol · read 2026-09-30

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

confidence A

PubChem CID

17100

documented

PUBCHEM-17100 · PubChem Compound Summary for CID 17100, Alpha-Terpineol · read 2026-09-30

confidence A

Formula

C10H18O

documented

PUBCHEM-17100 · PubChem Compound Summary for CID 17100, Alpha-Terpineol · read 2026-09-30

confidence A

Molecular weight

154.25

documented

PUBCHEM-17100 · PubChem Compound Summary for CID 17100, Alpha-Terpineol · read 2026-09-30

g/mol, as PubChem states it

confidence A

IUPAC name

2-(4-methylcyclohex-3-en-1-yl)propan-2-ol

documented

PUBCHEM-17100 · PubChem Compound Summary for CID 17100, Alpha-Terpineol · read 2026-09-30

confidence A

SMILES

CC1=CCC(CC1)C(C)(C)O

documented

PUBCHEM-17100 · PubChem Compound Summary for CID 17100, Alpha-Terpineol · read 2026-09-30

confidence A

InChIKey

WUOACPNHFRMFPN-UHFFFAOYSA-N

documented

PUBCHEM-17100 · PubChem Compound Summary for CID 17100, Alpha-Terpineol · read 2026-09-30

confidence A

Odour threshold

3300 µg/kg in water (orthonasal odour detection threshold in water, determined by the method of Czerny et al. 2008, Eur Food Res Technol 228:265–273, as the database states)

measured

OT-1 · Kreissl et al. (2022). Leibniz-LSB@TUM Odorant Database, Version 1.2 · read 2026-09-30

the racemate; the (S)-isomer 2300 and the (R)-isomer 18000 µg/kg in water (OT-1, the same study). Confidence B: an older entry in the same database gives 1200 µg/kg (isomer not stated)

confidence B

Descriptors

floral, citrus-like

documented

α-terpineol | CAS 98-55-5, 7785-53-7, 10482-56-1 | Odor quality: floral, citrus-like

OT-1 · Kreissl et al. (2022). Leibniz-LSB@TUM Odorant Database, Version 1.2 · read 2026-09-30

confidence A

Volatility class

not on record

not on record

the house’s volatility table (modeled) has no entry for α-terpineol

Regulation

• Regulation (EU) 2023/1545 (labelling of fragrance allergens)

documented

EU-2023-1545: each record above quotes its entry.

3D structure

PubChem computed 3D conformer · 29 atoms, 29 bonds

modeled

PUBCHEM-17100 · PubChem Compound Summary for CID 17100, Alpha-Terpineol · read 2026-09-30

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

confidence A

Wikidata

Q27109437

documented

P662 PubChem CID: 17100

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

the item states PubChem CID 17100 (P662) and the record’s InChIKey (P235); found by the statement search haswbstatement:P662=17100

confidence A

Odeuropa

EOKG concept

documented

{"concept":"http://data.odeuropa.eu/vocabulary/flavornet/odorants/65","relation":"owl:sameAs","via":"Q27109437","label":"α-terpineol","scheme":"http://data.odeuropa.eu/vocabulary/flavornet/odorants/"}

ODEUROPA-1 · Lisena, P., Ehrhart, T., Troncy, R · read 2026-09-30

the EOKG concept “α-terpineol” states owl:sameAs Q27109437 and the record’s CAS (wdt:P231)

confidence A

Occurs in

• lavender essential oil (huile essentielle de lavande)
  documented · no share

  the growers’ practice as the heritage record reports it: pre-wilting lowers α-terpineol in the oil. Named, not measured

  confidence B

Sources

1. PUBCHEM-17100 · PubChem Compound Summary for CID 17100, Alpha-Terpineol (2-(4-methylcyclohex-3-en-1-yl)propan-2-ol). 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/alpha-terpineol/cids/JSON · https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/cid/17100/property/MolecularFormula,MolecularWeight,IUPACName,Title,CanonicalSMILES,SMILES,InChIKey/JSON · https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/cid/17100/synonyms/JSON · https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/cid/17100/SDF?record_type=3d; the CAS checked back by https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/98-55-5/cids/JSON. pubchem.ncbi.nlm.nih.gov/compound/17100 · read 2026-09-30 · public domain (US government work, NCBI/NLM); acknowledgement requested , cite PubChem
2. OT-1 · Kreissl J, Mall V, Steinhaus P, Steinhaus M. Leibniz-LSB@TUM Odorant Database, Version 1.2. Leibniz Institute for Food Systems Biology at the Technical University of Munich: Freising, Germany, 2022. www.leibniz-lsb.de/en/databases/leibniz-lsbtum-o… · read 2026-09-30 · free of charge; scientific use encouraged with full acknowledgement; systematic download or reproduction needs written permission (quoted, not reproduced)
3. ODEUROPA-1 · Lisena, P., Ehrhart, T., Troncy, R. European Olfactory Knowledge Graph (EOKG), Odeuropa project. Zenodo, 2024. doi:10.5281/zenodo.10709703. SPARQL endpoint https://data.odeuropa.eu/repositories/odeuropa, read 2026-09-30. doi.org/10.5281/zenodo.10709703 · read 2026-09-30 · CC BY 4.0
4. 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/alpha-terpineol.json · version 5 · updated 2026-10-01 · confidence A