AInsights Entry for Alpha-Dihydroterpineol (CAS: 498-81-7)

1. Identity & Chemical Information

• Common Name(s): Alpha-Dihydroterpineol
• IUPAC Name: 2-(4-Methylcyclohex-3-en-1-yl)propan-2-ol
• CAS Number: 498-81-7
• FEMA Number: Data not found
• Other Identifiers: FL number not clearly reported; CoE number not found; IFRA reference not available
• Molecular Formula: C10H20O
• Molecular Weight: 156.27 g/mol
• Functional Groups and Structure–Odor Relevance: Alpha-dihydroterpineol is a monoterpenoid alcohol, which contributes to its characteristic odor profile. The presence of the hydroxyl group is significant for its solubility and reactivity in formulations.

Citation hooks: FlavScents; PubChem; FEMA

2. Sensory Profile

• Odor and Flavor Descriptors: Alpha-dihydroterpineol is known for its fresh, floral, and slightly citrus-like aroma. It is often described as having a moderate intensity with a clean, uplifting character.
• Taste and/or Odor Thresholds: Specific threshold data not found; however, it is typically used in low concentrations due to its potent aroma.
• Typical Sensory Role: It serves as an impact note in fragrance compositions and can act as a modifier in flavor systems, enhancing freshness and floral notes.

Citation hooks: FlavScents; peer-reviewed sensory literature

3. Natural Occurrence & Formation

• Known Natural Sources: Alpha-dihydroterpineol is found in various essential oils, including pine oil and petitgrain oil.
• Formation Pathways: It can be formed through the hydrogenation of terpineol or as a byproduct in the distillation of essential oils.
• Relevance to “Natural Flavor” or “Natural Fragrance” Designation: Its presence in natural essential oils allows it to be classified as a natural ingredient in both flavor and fragrance applications.

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

4. Use in Flavors

• Flavor Categories and Applications: Commonly used in citrus, floral, and herbal flavor profiles.
• Functional Role in Flavor Systems: Acts as a modifier to enhance freshness and complexity in flavor formulations.
• Typical Use Levels: Industry-typical use levels range from 1 to 10 ppm in finished food or beverage products.
• Stability Considerations: Generally stable under normal conditions but may degrade under high heat or acidic conditions.

Citation hooks: FlavScents; FEMA GRAS documentation; formulation literature

5. Use in Fragrances

• Fragrance Families and Product Types: Widely used in floral, citrus, and fresh fragrance families. Common in personal care products, household cleaners, and air fresheners.
• Functional Role: Provides trace realism and acts as a modifier to enhance the overall fragrance profile.
• Typical Concentration Ranges: Typically used at concentrations of 0.1% to 1% in fragrance formulations.
• Volatility and Top/Middle/Base Contribution: Contributes primarily to the top and middle notes due to its moderate volatility.

Citation hooks: FlavScents; IFRA; fragrance chemistry texts

6. Regulatory Status (Regional Overview)

• United States (FDA / FEMA GRAS): Not explicitly listed as GRAS; usage is based on industry practices.
• European Union (Reg. (EC) No 1334/2008; FL number status): Not clearly reported; assumed compliant under general flavoring regulations.
• United Kingdom (Post-Brexit Alignment or Divergence): Follows EU regulations; no specific divergence reported.
• Asia (Japan, China, ASEAN): Limited specific data; generally follows international standards.
• Latin America (e.g., Brazil, MERCOSUR): Data not clearly reported; typically aligns with international norms.

Citation hooks: FEMA; EFSA; national authority publications

7. Toxicology, Safety & Exposure Considerations

• Oral Exposure: No specific ADI or MSDI reported; considered safe at typical flavor use levels.
• Dermal Exposure: Generally non-irritating at typical fragrance concentrations; IFRA guidelines should be consulted for specific applications.
• Inhalation Exposure: Low volatility reduces inhalation risk; occupational exposure limits not specifically reported.

Citation hooks: EFSA; FEMA; PubChem; toxicology literature

8. Practical Insights for Formulators

• Why This Material is Valuable: Its fresh and floral aroma makes it versatile for both flavor and fragrance applications.
• Typical Synergies: Pairs well with other floral and citrus notes to enhance freshness.
• Common Formulation Pitfalls: Overuse can lead to an overpowering aroma; balance is key.
• Situations Where It is Frequently Over- or Under-Used: Often under-utilized in complex formulations where its subtlety can enhance overall profile.

Citation hooks: FlavScents; industry practice

9. Confidence & Data Quality Notes

• Well-Established Data: General sensory and chemical properties are well-documented.
• Industry-Typical but Undocumented Practices: Usage levels and regulatory assumptions are often based on industry norms.
• Known Data Gaps or Regulatory Ambiguities: Specific regulatory approvals and toxicological thresholds are not always clearly reported.

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 2026-06-01 04:59:05 GMT (p2)