FlavScents AInsights Entry for Styralyl Isobutyrate (CAS: 7775-39-5)

1. Identity & Chemical Information

• Common Name(s): Styralyl Isobutyrate
• IUPAC Name: 2-Phenylethyl 2-methylpropanoate
• CAS Number: 7775-39-5
• FEMA Number: Data not found
• Other Identifiers: FL number not clearly reported; CoE number not found; IFRA reference not available
• Molecular Formula: C12H16O2
• Molecular Weight: 192.26 g/mol

Styralyl isobutyrate is an ester compound characterized by its phenylethyl group linked to an isobutyrate moiety. The ester functional group contributes to its fruity and floral odor profile, making it relevant in both flavor and fragrance applications.

Citation hooks: FlavScents; PubChem; FEMA

2. Sensory Profile

Styralyl isobutyrate is known for its pleasant, sweet, and fruity aroma with floral undertones. It is often described as having a character reminiscent of pear and apple, with a moderate intensity and good diffusion properties. The compound is typically used as an impact note in formulations, providing a fresh and uplifting scent profile. Specific taste and odor thresholds are not clearly reported in the literature.

Citation hooks: FlavScents; peer-reviewed sensory literature

3. Natural Occurrence & Formation

Styralyl isobutyrate is not commonly found in nature and is primarily synthesized for use in flavor and fragrance applications. Its formation typically involves the esterification of phenylethyl alcohol with isobutyric acid. This synthetic pathway allows for consistent quality and availability, which is crucial for its use in commercial products. Due to its synthetic origin, it does not qualify for "natural flavor" or "natural fragrance" designations.

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

4. Use in Flavors

Styralyl isobutyrate is utilized in a variety of flavor categories, including fruit, floral, and confectionery applications. It serves as a functional component in flavor systems, often used to enhance the fruity notes in beverages, candies, and baked goods. Typical use levels in finished food products range from 1 to 10 ppm, with higher concentrations potentially leading to overpowering effects. The compound is relatively stable under typical processing conditions, though it may degrade under extreme heat or acidic conditions.

Citation hooks: FlavScents; FEMA GRAS documentation; formulation literature

5. Use in Fragrances

In the fragrance industry, styralyl isobutyrate is employed across various fragrance families, including floral, fruity, and green compositions. It acts as a modifier and impact note, contributing to the top and middle notes of a fragrance. Typical concentration ranges in perfumes and personal care products are from 0.1% to 1%, depending on the desired intensity and product type. Its volatility allows it to contribute to the initial impression of a fragrance, with moderate longevity.

Citation hooks: FlavScents; IFRA; fragrance chemistry texts

6. Regulatory Status (Regional Overview)

• United States: Not explicitly listed as FEMA GRAS; usage should comply with general safety standards.
• European Union: Not specifically listed under Reg. (EC) No 1334/2008; assumed safe under general flavoring regulations.
• United Kingdom: Post-Brexit regulations align with EU standards; no specific divergence noted.
• Asia: Limited specific data; generally follows international safety guidelines.
• Latin America: Data not found; typically aligns with international standards.

Explicit approvals are not well-documented, and formulators should verify compliance with local regulations.

Citation hooks: FEMA; EFSA; national authority publications

7. Toxicology, Safety & Exposure Considerations

• Oral Exposure: Data not found for ADI or MSDI; typical use levels suggest low risk when used within industry guidelines.
• Dermal Exposure: No specific IFRA restrictions; generally considered non-irritating at typical use levels.
• Inhalation Exposure: Volatility suggests potential for inhalation exposure; occupational safety measures should be considered.

Risk profiles do not significantly differ between food and fragrance applications, though exposure routes vary.

Citation hooks: EFSA; FEMA; PubChem; toxicology literature

8. Practical Insights for Formulators

Styralyl isobutyrate is valued for its ability to impart a fresh, fruity character to both flavors and fragrances. It synergizes well with other fruity and floral notes, enhancing overall complexity. Common pitfalls include overuse, which can lead to an artificial or cloying effect. It is often underutilized in formulations seeking a subtle, natural fruitiness.

Citation hooks: FlavScents; industry practice

9. Confidence & Data Quality Notes

Data on styralyl isobutyrate is well-established in terms of sensory characteristics and typical use levels. However, regulatory and toxicological data are less comprehensive, requiring formulators to rely on industry-typical practices and general safety guidelines.

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
• Section 5a is not applicable as the material is a single compound

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 2026-06-12 05:48:22 GMT (p2)