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alpha-Terpinene

Also known as: p-Mentha-1,3-diene

Fresh, herbaceous, slightly lemony, terpy, green

IFRA Restriction

This is the maximum allowed percentage of this material in the total finished product, not in the fragrance concentrate.

For example, if a fine fragrance (Category 4A) contains 20% fragrance oil, and IFRA allows 10% of this material, the material can be up to 50% of the fragrance concentrate (10% ÷ 20% = 50%).

EU Allergen

This ingredient is classified as an EU allergen under the Cosmetics Regulation (EC) No 1223/2009.

Labeling thresholds:

  • 0.001% in leave-on products
  • 0.01% in rinse-off products
Learn more →
CAS 99-86-5
Manufacturers Various

About alpha-Terpinene

A monocyclic monoterpene found in many essential oils.

Molecular Information
Molecular Formula C10H16
Molecular Weight 136.23 g/mol
Boiling Point 173.00 to 175.00 °C. @ 760.00 mm Hg
Density 0.833-0.838
LogP 4.25
InChIKey YHQGMYUVUMAZJR-UHFFFAOYSA-N
Sources: PubChem

Safety Information
Danger

GHS Classification

Acute toxicity, oralAspiration hazardFlammable liquidsHazardous to the aquatic environment, long-term hazardSensitization, Skin

Hazard Statements

  • H226: Flammable liquid and vapor
  • H302: Harmful if swallowed
  • H304: May be fatal if swallowed and enters airways
  • H317: May cause an allergic skin reaction
  • H411: Toxic to aquatic life with long lasting effects
Sources: PubChem (EU Harmonized Classification)