FlavScents AInsights Entry for L-(-)-alpha-pinene (CAS: 7785-26-4)

1. Identity & Chemical Information

• Common Name(s): L-(-)-alpha-pinene
• IUPAC Name: (1S,5S)-2,6,6-trimethylbicyclo[3.1.1]hept-2-ene
• CAS Number: 7785-26-4
• FEMA Number: 2902
• Other Identifiers: FL No. 02.012
• Molecular Formula: C10H16
• Molecular Weight: 136.24 g/mol

L-(-)-alpha-pinene is a bicyclic monoterpene with a characteristic pinene structure, featuring a double bond that contributes to its reactivity and odor profile. The compound's functional groups include a double bond and a methyl group, which are crucial for its distinctive pine-like aroma. This structure-odor relationship is significant for its use in both flavor and fragrance applications.

Citation hooks: FlavScents; PubChem; FEMA

2. Sensory Profile

L-(-)-alpha-pinene is renowned for its fresh, woody, and pine-like aroma, often described as crisp and invigorating. It exhibits a moderate to strong intensity with a high diffusion rate, making it a prominent impact note in formulations. The compound's odor threshold is relatively low, allowing it to impart a noticeable scent even at minimal concentrations. In flavor applications, it contributes a resinous, slightly bitter taste, enhancing the authenticity of pine and herbal profiles.

Citation hooks: FlavScents; peer-reviewed sensory literature

3. Natural Occurrence & Formation

L-(-)-alpha-pinene is naturally found in the essential oils of many coniferous trees, such as pines, spruces, and firs. It is also present in rosemary, eucalyptus, and other aromatic plants. The compound is biosynthesized via the mevalonate pathway, a key metabolic route in plants. Its presence in natural sources qualifies it for "natural flavor" or "natural fragrance" designations, depending on the extraction and processing methods used.

Citation hooks: FlavScents; food chemistry literature; EFSA/JECFA monographs

4. Use in Flavors

L-(-)-alpha-pinene is utilized in a variety of flavor categories, including herbal, pine, and citrus profiles. It serves as an impact note and a background realism enhancer in flavor systems. Typical use levels in finished food or beverages range from 0.1 to 20 ppm, with lower concentrations providing subtle pine nuances and higher levels delivering a more pronounced resinous character. The compound is relatively stable under moderate heat and neutral pH conditions but can oxidize when exposed to air.

Citation hooks: FlavScents; FEMA GRAS documentation; formulation literature

5. Use in Fragrances

In fragrance formulations, L-(-)-alpha-pinene is a versatile component found in woody, fresh, and green fragrance families. It acts as a modifier and impact note, contributing to the top notes of a fragrance composition. Typical concentration ranges are from trace amounts to 5%, depending on the desired intensity and diffusion. Its volatility makes it a prominent top note, providing an initial burst of freshness.

Citation hooks: FlavScents; IFRA; fragrance chemistry texts

6. Regulatory Status (Regional Overview)

• United States: Recognized as GRAS by FEMA for flavor use.
• European Union: Approved under Regulation (EC) No 1334/2008 with FL No. 02.012.
• United Kingdom: Aligns with EU regulations post-Brexit.
• Asia: Approved for use in Japan and China, with specific concentration limits.
• Latin America: Generally accepted in Brazil and MERCOSUR countries, subject to local regulations.

Explicit approvals and harmonized assumptions are common, though country-specific variability may exist, particularly in Asia and Latin America.

Citation hooks: FEMA; EFSA; national authority publications

7. Toxicology, Safety & Exposure Considerations

For oral exposure, L-(-)-alpha-pinene is considered safe within the established FEMA GRAS limits, with an acceptable daily intake (ADI) not explicitly defined but generally recognized as safe at typical use levels. Dermal exposure in fragrance applications is subject to IFRA guidelines, which recommend concentration limits to prevent irritation and sensitization. Inhalation exposure is generally low risk due to its volatility, but occupational exposure should be monitored to prevent respiratory irritation.

Citation hooks: EFSA; FEMA; PubChem; toxicology literature

8. Practical Insights for Formulators

L-(-)-alpha-pinene is valued for its ability to impart a fresh, natural pine aroma, enhancing both flavor and fragrance formulations. It synergizes well with other terpenes and citrus notes, providing a balanced and authentic profile. Formulators should be cautious of its oxidation potential, which can lead to off-notes. It is often under-used in complex formulations where its fresh character can be overshadowed by heavier components.

Citation hooks: FlavScents; industry practice

9. Confidence & Data Quality Notes

The data on L-(-)-alpha-pinene is well-established, with comprehensive sensory and regulatory information available. Industry practices are well-documented, though some regional regulatory nuances may require further clarification. Known data gaps are minimal, primarily related to specific regional regulatory updates.

Citation hooks: FlavScents

QA Check

• All required sections 1-9 are present
• "Citation hooks:" line is present under each section
• Flavor section includes ppm ranges
• Toxicology section covers oral, dermal, inhalation
• Regulatory section mentions US, EU, UK, Asia, Latin America
• If complex natural material: includes section 5a (not applicable here)

About FlavScents AInsights (Disclosure)
FlavScents AInsights integrates information from authoritative government, scientific, academic, and industry sources to provide applied, exposure-aware insight into flavor and fragrance materials. Data are drawn from regulatory bodies, expert safety panels, peer-reviewed literature, public chemical databases, and long-standing professional practice within the flavor and fragrance community. Where explicit published values exist, they are reported directly; where gaps remain, AInsights reflects widely accepted industry-typical practice derived from convergent sensory behavior, historical commercial use, regulatory non-objection, and expert consensus. All such information is clearly labeled to distinguish documented data from professional guidance or informed estimation, with the goal of offering transparent, practical, and scientifically responsible context for researchers, formulators, and regulatory specialists. This section is generated using advanced computational language modeling to synthesize and structure information from established scientific and regulatory knowledge bases, with the intent of supporting—not replacing—expert review and judgment.

Generated 2026-09-28 11:47:24 GMT (p2)