FlavScents AInsights Entry for Hay Absolute (CAS: 8031-00-3)

1. Identity & Chemical Information

Hay absolute is a natural complex material derived from the dried aerial parts of grasses, primarily from the Poaceae family. It is not a single chemical compound but a mixture of various constituents. The CAS number for hay absolute is 8031-00-3. It does not have a specific FEMA number due to its complex nature. Other identifiers such as FL number or CoE number are not typically assigned to such complex materials. As an absolute, it is obtained through solvent extraction, which concentrates its aromatic components. The composition of hay absolute can vary significantly depending on the source, harvest time, and processing methods.

Citation hooks: FlavScents; PubChem; FEMA

2. Sensory Profile

Hay absolute is characterized by its warm, sweet, and coumarinic aroma, reminiscent of freshly cut hay. It has a rich, herbaceous scent with nuances of tobacco and a hint of sweetness. The intensity of its odor is moderate, making it suitable for use as a background note or modifier in fragrance compositions. The diffusion of hay absolute is relatively low, contributing to its role as a base note in perfumery. Specific taste or odor thresholds are not well-documented, but its sensory impact is significant enough to be used in trace amounts for its characteristic aroma.

Citation hooks: FlavScents; peer-reviewed sensory literature

3. Natural Occurrence & Formation

Hay absolute is naturally sourced from various species of grasses, particularly those in the Poaceae family. The formation of its characteristic aroma is primarily due to the presence of coumarin and other aromatic compounds that develop during the drying process of the grass. This material is often used in products labeled as "natural fragrance" due to its plant-derived origin. The extraction process involves the use of solvents to obtain the concentrated absolute, which retains the complex aromatic profile of the original plant material.

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

4. Use in Flavors

In flavor applications, hay absolute is used sparingly due to its potent aroma. It is typically employed in flavor categories such as tobacco, herbal, and certain alcoholic beverages to impart a warm, sweet, and slightly coumarinic note. The functional role of hay absolute in flavor systems is often as a background realism enhancer or a subtle modifier. Typical use levels in finished food or beverage products are not well-documented, but industry practice suggests usage in the low ppm range, often below 10 ppm, to avoid overpowering the flavor profile. Hay absolute is relatively 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

Hay absolute is a valued component in the fragrance industry, particularly in the creation of fougère, chypre, and oriental fragrance families. It serves as a base note, providing depth and warmth to the overall scent profile. The typical concentration ranges in fragrance formulations vary, but it is often used in trace amounts to moderate levels, depending on the desired intensity. Its volatility is low, contributing to its role as a base note, and it blends well with other natural absolutes and essential oils.

Citation hooks: FlavScents; IFRA; fragrance chemistry texts

5a. Key Constituents (Typical)

The key constituents of hay absolute include coumarin, which is primarily responsible for its sweet, hay-like aroma. Other significant components may include various esters, alcohols, and aldehydes, which contribute to its complex scent profile. The exact composition can vary based on factors such as the species of grass used, the geographical origin, and the extraction process. It is important to note that the composition is not fixed and can differ significantly between batches.

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

6. Regulatory Status (Regional Overview)

In the United States, hay absolute is not specifically listed under FEMA GRAS but may be used in flavors under general natural flavoring guidelines. In the European Union, it is subject to the regulations under Reg. (EC) No 1334/2008, which governs flavoring substances. The UK follows similar regulations post-Brexit. In Asia, including Japan and China, and in Latin America, such as Brazil and MERCOSUR, hay absolute is generally accepted in flavors and fragrances, but specific regulatory approvals may vary. It is important for formulators to verify compliance with local regulations.

Citation hooks: FEMA; EFSA; national authority publications

7. Toxicology, Safety & Exposure Considerations

The safety of hay absolute in flavor and fragrance applications is generally considered acceptable when used within typical industry levels. Oral exposure through flavor use is minimal, and no specific ADI or MSDI values are established. Dermal exposure in fragrances may pose a risk of irritation or sensitization, particularly due to the presence of coumarin, which is a known sensitizer. IFRA provides guidelines on its use in fragrances to mitigate these risks. Inhalation exposure is typically low due to its use as a base note, but occupational exposure should be managed with appropriate ventilation and protective measures.

Citation hooks: EFSA; FEMA; PubChem; toxicology literature

8. Practical Insights for Formulators

Hay absolute is valued for its unique aroma profile, which can add depth and warmth to both flavors and fragrances. It synergizes well with other natural materials, such as lavender, oakmoss, and tonka bean. Formulators should be cautious of its potent aroma, as overuse can lead to an overpowering scent. It is often under-used in modern formulations, where its traditional appeal can enhance the authenticity of natural-themed products.

Citation hooks: FlavScents; industry practice

9. Confidence & Data Quality Notes

The data on hay absolute is well-established in terms of its sensory profile and typical applications. However, specific quantitative data on use levels and regulatory approvals can be limited or vary by region. Industry practices often rely on historical usage patterns and expert judgment. Known data gaps include detailed toxicological studies and comprehensive regulatory listings in some regions.

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 2026-08-17 05:27:22 GMT (p2)