FlavScents AInsights Entry: Grapefruit Oil Folded (CAS: 8016-20-4)
1. Identity & Chemical Information
Grapefruit oil folded is a natural complex material derived from the peel of the grapefruit (Citrus paradisi). It is a type of essential oil that has undergone a folding process to concentrate its aromatic components, particularly the terpenes, enhancing its olfactory properties. The CAS number for grapefruit oil folded is 8016-20-4. It does not have a specific FEMA number as it is a complex mixture rather than a single compound. Other identifiers include its FL number and CoE number, which are used in flavor and fragrance regulatory contexts. The composition of grapefruit oil folded can vary significantly depending on the source, harvest time, and processing methods.
Citation hooks: FlavScents; PubChem; FEMA
2. Sensory Profile
Grapefruit oil folded is characterized by its fresh, citrusy, and slightly bitter aroma, reminiscent of the fruit itself. It is often described as having a bright, zesty top note with a sweet and tangy undertone. The intensity of the aroma is moderate to strong, with good diffusion properties. It is primarily used as an impact note in both flavor and fragrance formulations, providing a refreshing and uplifting character. The taste threshold for grapefruit oil folded is not well-documented, but it is typically used in small amounts due to its potent sensory impact.
Citation hooks: FlavScents; peer-reviewed sensory literature
3. Natural Occurrence & Formation
Grapefruit oil folded is naturally sourced from the peel of the grapefruit, a hybrid fruit believed to have originated in Barbados as a cross between the sweet orange and pomelo. The oil is obtained through cold pressing or steam distillation of the fruit peel. The folding process involves removing some of the terpenes to concentrate the more aromatic components, enhancing its stability and olfactory profile. This oil is often used in products labeled as "natural flavor" or "natural fragrance" due to its direct derivation from a natural source.
Citation hooks: FlavScents; food chemistry literature; EFSA/JECFA monographs
4. Use in Flavors
Grapefruit oil folded is widely used in the flavor industry, particularly in citrus-flavored beverages, candies, and desserts. It serves as a key component in citrus flavor blends, providing a fresh and authentic grapefruit note. Typical use levels in finished food products range from 5 to 50 ppm, depending on the desired intensity and the product matrix. It is important to consider its stability, as grapefruit oil can be sensitive to heat and oxidation, which may lead to flavor degradation over time.
Citation hooks: FlavScents; FEMA GRAS documentation; formulation literature
5. Use in Fragrances
In the fragrance industry, grapefruit oil folded is valued for its vibrant and uplifting scent, making it a popular choice in citrus, fresh, and fruity fragrance families. It is used in a variety of product types, including perfumes, colognes, and personal care products. The oil acts as a top note, providing an initial burst of freshness that enhances the overall fragrance composition. Typical concentration ranges in fragrance formulations are from 0.1% to 1%, depending on the desired effect and product type.
Citation hooks: FlavScents; IFRA; fragrance chemistry texts
5a. Key Constituents (Typical)
The major constituents of grapefruit oil folded include limonene, myrcene, and nootkatone, among others. Limonene is the predominant component, contributing to the oil's characteristic citrus aroma. Myrcene adds a sweet and balsamic note, while nootkatone provides a distinctive grapefruit character. The composition of these constituents can vary based on factors such as geographic origin, climate, and processing methods.
Citation hooks: FlavScents; peer-reviewed literature; authoritative industry references
6. Regulatory Status (Regional Overview)
In the United States, grapefruit oil folded is generally recognized as safe (GRAS) for use in food and beverages by FEMA. In the European Union, it is regulated under Regulation (EC) No 1334/2008 and has an assigned FL number. The United Kingdom follows similar regulations post-Brexit. In Asia, countries like Japan and China have their own regulatory frameworks, which generally align with international standards. In Latin America, countries such as Brazil and those in MERCOSUR have specific guidelines for the use of essential oils in food and cosmetics.
Citation hooks: FEMA; EFSA; national authority publications
7. Toxicology, Safety & Exposure Considerations
Grapefruit oil folded is considered safe for use in food and fragrance applications when used within recommended levels. For oral exposure, the acceptable daily intake (ADI) is not specifically established, but it is used in low concentrations in food products. Dermal exposure in fragrance applications is generally safe, although it may cause irritation or sensitization in sensitive individuals. The International Fragrance Association (IFRA) provides guidelines on its use in cosmetics. Inhalation exposure is typically low risk, but occupational exposure should be managed to prevent respiratory irritation.
Citation hooks: EFSA; FEMA; PubChem; toxicology literature
8. Practical Insights for Formulators
Grapefruit oil folded is prized for its ability to impart a fresh and authentic citrus note to both flavors and fragrances. It blends well with other citrus oils and can enhance the overall brightness of a formulation. Formulators should be aware of its sensitivity to heat and oxidation, which can affect its stability and sensory profile. It is often underused in complex fragrance compositions where its top note can provide a refreshing lift.
Citation hooks: FlavScents; industry practice
9. Confidence & Data Quality Notes
The data on grapefruit oil folded is well-established, with extensive documentation available from industry sources and regulatory bodies. While some variability in composition is expected due to natural factors, industry practices provide a reliable framework for its use. Known data gaps include specific taste thresholds and detailed toxicological profiles, which are areas for further research.
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
- Includes section 5a for complex natural material
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 2026-08-29 09:44:13 GMT (p2)
