Ingredient Dictionary

L-ALPHA-PINENE

(-)-alpha-pinene is an alpha-pinene.

Definition

(-)-alpha-pinene is an alpha-pinene. It is an enantiomer of a (+)-alpha-pinene.

Source: PubChem

US FDA substance register · UNII TZR3GM95PR · registered name α-Pinene, (-)- · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Gives the product a scentPERFUMING

Safety & regulatory references

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

Restriction III/130

Source: EU CosIng ingredient list

More data — names, identifiers, properties, test records, literature

Names & identifiers

L-ALPHA-PINENEINCIBicyclo[3.1.1]hept-2-ene, 2,6,6-trimethyl-, (1S)-Synonym

CAS No.chemical registry number: 7785-26-4
EC No.EU chemical inventory number: 232-077-3
DTXSIDUS EPA chemical ID: DTXSID2029290
DTXCIDUS EPA compound ID: DTXCID009290

IUPAC: (1S,5S)-2,6,6-Trimethylbicyclo[3.1.1]hept-2-ene
Molecular formula: C10H16
Molecular weight: 136.238 g/mol

Measured properties

Appearance: Liquid · Liquid with an odor of turpentine, [Merck Index] Colorless liquid, [Acros Organics MSDS]
Boiling point: 155.00 to 157.00 °C. @ 760.00 mm Hg
Melting point: -62 °C
Colour: colourless
pH: 5~9.5
Melting/freezing point: -55 ℃
Initial boiling point and range: 155 ℃
Flash point: 31.3 ℃
Vapour pressure: 529 ㎩((25°C))
Water solubility: 2.3 ㎎/ℓ
Relative density: 0.858 ((20°C))
n-Octanol/water partition coefficient (Kow): 4.48
Viscosity: 2.11 cSt(20°C (dynamic))

Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.

Source: PubChem · KOSHA safety data sheets (Korea)

What products actually use it for

What the 13 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.

Fragrance11
Dye1
Flavouring and nutrient1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

2 skin studies and 2 eye studies are on record.

Classed as moderate1

The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 4 studies

Category 6.5B (Category 1)
Skin Sensitization · Read Across
Category 6.3A (Category 2)
Skin Irritation · Read Across
Category 6.4A (Category 2A)
Eye Irritation · Read Across
Studies Indicate No Significant Irritation
eye irritation: in vitro / ex vivo · Screening · other guideline: OECD Guideline 492 (Reconstructed Human Cornea-like Epithelium (RhCE) Test Method for Identifying Chemicals Not Requiring Classification and Labelling for Eye Irritation or Serious Eye Damage) according to