FlavScents AInsights Entry for para-Cymene (CAS: 99-87-6)
1. Identity & Chemical Information
- Common Name(s): para-Cymene, p-Cymene
- IUPAC Name: 1-methyl-4-(propan-2-yl)benzene
- CAS Number: 99-87-6
- FEMA Number: 2348
- Other Identifiers: FL No. 02.012, CoE No. 206
- Molecular Formula: C10H14
- Molecular Weight: 134.22 g/mol
para-Cymene is a monoterpene with a benzene ring substituted with a methyl group and an isopropyl group. Its structure contributes to its characteristic aromatic odor, often described as citrusy and woody. The presence of the isopropyl group enhances its volatility, making it a significant component in both flavor and fragrance applications.
Citation hooks: FlavScents; PubChem; FEMA
2. Sensory Profile
para-Cymene is known for its distinctive aromatic profile, characterized by a citrusy, woody, and slightly spicy odor. It is often described as having a medium intensity with moderate diffusion. In flavor applications, para-cymene serves as an impact note, providing a fresh and clean citrus character. Its odor threshold is relatively low, allowing it to be perceived at minimal concentrations, although specific threshold values are not widely reported.
Citation hooks: FlavScents; peer-reviewed sensory literature
3. Natural Occurrence & Formation
para-Cymene is naturally found in a variety of essential oils, including cumin, thyme, and oregano oils. It is also present in the peel oils of citrus fruits. The compound can form through the dehydrogenation of p-menthane or via the oxidation of limonene. Its presence in natural sources qualifies it for use in products labeled as containing "natural flavors" or "natural fragrances."
Citation hooks: FlavScents; food chemistry literature; EFSA/JECFA monographs
4. Use in Flavors
para-Cymene is utilized in flavor formulations across several categories, including citrus, herbal, and spice flavors. It acts as a modifier, enhancing the freshness and authenticity of citrus profiles. Typical use levels in food and beverages range from 1 to 20 ppm, with higher concentrations potentially leading to overpowering notes. It is relatively stable under acidic conditions but may degrade under prolonged heat exposure.
Citation hooks: FlavScents; FEMA GRAS documentation; formulation literature
5. Use in Fragrances
In fragrance applications, para-cymene is incorporated into citrus, woody, and spicy fragrance families. It serves as a top note, providing initial freshness and brightness. Typical concentrations in fragrance formulations range from trace amounts to 1%, depending on the desired intensity and product type. Its volatility contributes to its role as a top note, although it can also provide middle note support in complex compositions.
Citation hooks: FlavScents; IFRA; fragrance chemistry texts
6. Regulatory Status (Regional Overview)
- United States: para-Cymene is recognized as GRAS (Generally Recognized As Safe) by FEMA for flavor use.
- European Union: Approved under Regulation (EC) No 1334/2008 with FL No. 02.012.
- United Kingdom: Follows EU regulations post-Brexit with no significant divergence reported.
- Asia: Approved for use in Japan and China, with specific concentration limits varying by country.
- Latin America: Generally accepted in Brazil and MERCOSUR countries, with harmonized assumptions aligning with international standards.
Citation hooks: FEMA; EFSA; national authority publications
7. Toxicology, Safety & Exposure Considerations
For oral exposure, para-cymene is considered safe within the typical use levels in food, with no specific ADI established but generally recognized as safe by FEMA. Dermal exposure in fragrance applications is monitored by IFRA, with no significant irritation or sensitization reported at typical use levels. Inhalation exposure is considered low risk due to its moderate volatility and typical concentrations in consumer products.
Citation hooks: EFSA; FEMA; PubChem; toxicology literature
8. Practical Insights for Formulators
para-Cymene is valued for its ability to enhance citrus and herbal notes in both flavors and fragrances. It synergizes well with other terpenes and citrus components, providing a fresh and clean profile. Formulators should be cautious of its volatility and potential for overpowering other notes if used excessively. It is often under-utilized in complex fragrance compositions where its fresh character can provide a unique twist.
Citation hooks: FlavScents; industry practice
9. Confidence & Data Quality Notes
The data on para-cymene is well-established, with comprehensive sensory and regulatory information available. While specific sensory thresholds are not always reported, industry practices provide reliable guidance for its use. Regulatory approvals are consistent across major markets, although formulators should verify specific regional requirements.
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 2026-09-02 19:08:41 GMT (p2)