MOLECULE
Named in 2 VERIFIED claims about 2 Atlas entries: Grapefruit Peel, Freshly Cleaned Room.
Major component · the claim says “as the main compounds”
Cold-pressed peel oil of redblush grapefruit from Kenya had limonene (91.1%), α-terpinene and α-pinene as the main compounds; nootkatone, α- and β-sinensal and methyl N-methylanthranilate were described as prominent.
Scope: One grapefruit form from one locality; it reports the oil's composition, not a sensory analysis. CLM-GRAPEFRUIT-001 ↗
Reported volatile · the claim says “raised one-hour air concentrations of terpenoids such as”
In a ventilated 50 m³ test room, full-strength use of a pine-oil cleaner raised one-hour air concentrations of terpenoids such as d-limonene, terpinolene, α-terpinene and α-terpineol, and air fresheners emitted d-limonene, dihydromyrcenol, linalool, linalyl acetate and β-citronellol; diluted cleaning released a much smaller share.
Scope: Five cleaning products and air fresheners used in one test room; it measures emissions, not how a cleaned room is perceived. CLM-CLEANING-001 ↗
YHQGMYUVUMAZJR-UHFFFAOYSA-NChecked against PubChem and Wikidata on 2026-10-05 by an automated identifier check. Every name SmellBook uses must resolve to the same single PubChem compound.
SmellBook lists a molecule only where a VERIFIED claim names it, in the role and scope that claim states. A molecule reported in a smell's evidence is not the whole smell: most smells come from many compounds together, and the studies measured particular samples, such as one cultivar, an essential oil or a cooked product.
Permanent identifier smellbook:molecule:alpha-terpinene · Graph record (JSON)
Cite as SmellBook. (2026). α-terpinene (molecule). SmellBook knowledge graph, dataset release of 2026-10-05. smellbook:molecule:alpha-terpinene. https://smellbook.com/molecules/alpha-terpinene
Dataset history In the SmellBook dataset since the dataset release of 2026-10-05 · sha256 d10c2deef978.