α-Pinene

from source

C10H16 · 136.23 g/mol

acintene A · Sylvapine A

What is α-Pinene?

The smell of a pine forest and of fresh rosemary. It is the most widely distributed terpene in nature and the main component of turpentine. Found in black pepper. from source

CategoryScent & aroma

LeaderboardsBiggest Deadliest

Fig. 1 · 2D structure RDKit

SMILESCC1=CCC2CC1C2(C)C

Where you'll find it

Black pepperwhat else is in it →

Curated by MoleculeFinder from source

The dose makes the poison inferred

A reported rat oral LD50 for α-Pinene is 3,700 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:

your weight154 lb

259.0 g

a median lethal dose scaled to 154 lb (259,000 mg)

“The dose makes the poison” is a cross-species estimate shown as neutral science, not a threshold anyone should act on. Real toxicity depends on the person, not body mass alone.

Toxicity & hazards

Toxicity · LD50

3,700 mg/kg · very low toxicity · LD50 rat oral from source

The dose lens above scales this to a body weight.

DangerFlammableCorrosiveIrritantHealth hazardEnvironmentalH226, H302, H304, H315, H317, H318, H371, H372, H373, H400, H410from source

Sources & methodology

PubChem CID: 6654
Wikidata: Q27104380
Structure: PubChem → RDKit
LD50: PubChem
Everyday relationships: MoleculeFinder editorial curation
Data refreshed: October 19, 2026

How MoleculeFinder sources and labels its data