FlavScents AInsights Entry: Siam Benzoin Resinoid (CAS: 9000-72-0)

1. Identity & Chemical Information

• Common Name(s): Siam Benzoin Resinoid
• CAS Number: 9000-72-0
• FEMA Number: Not applicable
• Other Identifiers: FL number not specified; CoE number not specified; IFRA reference available
• Material Type: Natural complex material derived from the resin of Styrax tonkinensis trees
• Key Characteristics: Siam benzoin resinoid is a balsamic resin with a complex mixture of constituents, primarily benzoic acid, vanillin, and coniferyl benzoate. It is known for its sweet, vanilla-like aroma.

Citation hooks: FlavScents; PubChem; FEMA

2. Sensory Profile

Siam benzoin resinoid is characterized by its rich, sweet, and balsamic aroma with strong vanilla and cinnamon-like notes. It is often described as warm and comforting, with a moderate to high intensity and good diffusion. The resinoid serves as an impact note in formulations, providing depth and warmth to both flavors and fragrances.

Citation hooks: FlavScents; peer-reviewed sensory literature

3. Natural Occurrence & Formation

Siam benzoin resinoid is naturally sourced from the resin of the Styrax tonkinensis tree, native to Southeast Asia, particularly Thailand and Laos. The resin is collected and processed to produce the resinoid. It is considered a natural fragrance and flavor material due to its direct derivation from plant sources without synthetic modification.

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

4. Use in Flavors

Siam benzoin resinoid is used in flavor formulations to impart a sweet, vanilla-like note. It is commonly found in confectionery, bakery products, and beverages. Typical use levels in finished products range from 5 to 50 ppm, with variations depending on the desired intensity and product type. The resinoid is stable under typical processing conditions but may degrade under extreme heat or acidic conditions.

Citation hooks: FlavScents; FEMA GRAS documentation; formulation literature

5. Use in Fragrances

In perfumery, Siam benzoin resinoid is valued for its warm, sweet, and balsamic qualities. It is used across various fragrance families, including oriental and gourmand, and is often employed as a base note to provide longevity and depth. Typical concentrations range from 0.1% to 5% in fragrance formulations, depending on the desired effect and product type.

Citation hooks: FlavScents; IFRA; fragrance chemistry texts

5a. Key Constituents (Typical)

• Benzoic Acid: Major constituent contributing to the balsamic aroma.
• Vanillin: Provides the characteristic vanilla note.
• Coniferyl Benzoate: Adds to the sweet and resinous profile.

Composition may vary based on the origin, harvest, and processing methods of the resin.

Citation hooks: FlavScents; peer-reviewed literature; authoritative industry references

6. Regulatory Status (Regional Overview)

• United States: Generally recognized as safe (GRAS) for flavor use; no specific restrictions for fragrance use.
• European Union: Permitted under Regulation (EC) No 1334/2008; no specific FL number.
• United Kingdom: Aligns with EU regulations post-Brexit.
• Asia: Approved for use in Japan and China; specific ASEAN regulations not detailed.
• Latin America: Generally accepted in Brazil and MERCOSUR countries, but specific regulations may vary.

Citation hooks: FEMA; EFSA; national authority publications

7. Toxicology, Safety & Exposure Considerations

• Oral Exposure: Considered safe for use in food at typical flavor concentrations; no specific ADI or MSDI established.
• Dermal Exposure: Generally non-irritating and non-sensitizing at typical fragrance concentrations; IFRA guidelines should be consulted.
• Inhalation Exposure: Low volatility reduces inhalation risk; occupational exposure limits not specified.

Risk profiles are similar for both food and fragrance applications, with no significant safety concerns at typical use levels.

Citation hooks: EFSA; FEMA; PubChem; toxicology literature

8. Practical Insights for Formulators

Siam benzoin resinoid is prized for its ability to impart warmth and sweetness, making it a versatile component in both flavors and fragrances. It synergizes well with vanilla, cinnamon, and other sweet or spicy notes. Formulators should be cautious of potential overuse, which can lead to an overpowering sweetness. It is often underutilized in savory applications where it can add unexpected depth.

Citation hooks: FlavScents; industry practice

9. Confidence & Data Quality Notes

The data on Siam benzoin resinoid is well-established, with consistent sensory and regulatory information available. However, specific quantitative data on use levels and safety assessments are often industry-typical rather than explicitly documented. Known data gaps include detailed compositional analysis and regional regulatory nuances.

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 2026-11-03 19:33:03 GMT (p2)