Consumers today expect more than just sweetness or saltiness-they crave layered, authentic flavor experiences that tell a story. Whether it is the sharp tang of an aged Parmesan, the buttery richness of Greek yogurt, or the savory depth of slow‑cooked meat, these complex profiles are what keep customers coming back. Behind the artistry of flavor creation stands a family of unsung chemical building blocks. 4‑Methylvaleric acid (also known as 4‑Methylpentanoic acid, Isocaproic acid, CAS 646-07-1) is one of them.
This branched‑chain carboxylic acid delivers a pungent, penetrating cheese‑like note that is unmistakably "sharp," "aged," and "savory." Recognized by the FEMA Expert Panel as GRAS (Generally Recognized as Safe) with number 3463, it is a reliable choice for formulators who must balance bold taste with safety and regulatory peace of mind. This guide explores the versatile applications of 4‑methylvaleric acid, explains why it has become an indispensable tool for flavorists and formulators, and shows you what to look for when choosing a trusted supplier.
What Is 4‑Methylvaleric Acid?
4‑Methylvaleric acid (4‑methylpentanoic acid, isocaproic acid) is a short‑chain, branched carboxylic acid belonging to the class of methyl‑branched fatty acids. It occurs naturally in a variety of foods, including aged cheese, lamb fat, blue cheese, strawberry jam, and apples. In the human body, it is a metabolite of 20α‑hydroxycholesterol and participates in the biosynthesis of steroid hormones. For flavor manufacturers, the synthetic form, chemically identical to the natural molecule, has become a favorite for delivering intense, authentic cheesy notes at a fraction of the cost.
Core Applications of 4‑Methylvaleric Acid
4‑Methylvaleric acid is prized across multiple industries for its potent, cheese‑like character and its utility as a versatile building block.
Food Industry: Dairy, Savory, and Fermented Delicacies
The primary application of 4‑methylvaleric acid is in food flavoring. Because it is naturally present in many dairy and fermented products, it has a deep sensory association with hard, aged, or blue cheese. Even at minute levels, it instantly amplifies the "aged" character in cream cheese, processed cheese spreads, or shredded cheese blends.
- Cheese flavors – Create sharp, acidic cheese notes in processed cheese, cheese powders, and snack coatings.
- Dairy applications – Enhance yogurt, butter, cream cheese, and cultured dairy products, adding a tangy depth that mimics traditional fermentation.
- Savory & meat flavors – Contribute an aged, cooked note to meat broths, bouillons, and savory snacks, amplifying umami and roasted profiles.
- Fermented products & beverages – Add complexity to fermented condiments (kimchi, sauerkraut) and pickled vegetables, and provides an acidic backdrop in certain craft beers.
Typical usage levels (from food ingredient databases) are approximately 1.0 mg/kg in soft drinks, 1.5 mg/kg in candy, and 6.0 mg/kg in cheese.
Fragrance Industry: Building Warm and "Skin‑like" Accords
In perfumery, 4‑methylvaleric acid is used to construct base notes that make a scent linger on the skin. Its mild, animalic undertone gives fragrances a "skin‑like" quality and helps ground sweet or floral compositions.
- Musk and animalic accords – Add subtle cheesy notes that make leather, smoke, and oud‑style fragrances feel more natural.
- Gourmand scents – Bridge top and heart notes in vanilla, caramel, and nutty compositions.
- Fruity nuances – Its esters introduce sweet, fruity notes (apple, tropical, pineapple) to perfumes and colognes.
Pharmaceutical Industry: A Strategic Intermediate
Pharmaceutical R&D teams rely on high‑purity carboxylic acids for the synthesis of complex molecules. 4‑Methylvaleric acid has been used as an intermediate in the asymmetric synthesis of chiral building blocks and in the preparation of drug candidates such as enzyme inhibitors and receptor antagonists. As a human endogenous metabolite, it is also studied for its role in steroid metabolism.
Other Industrial Applications
- Specialty chemicals – Building block for surfactants, lubricants, plasticizers, and coatings.
- Agrochemicals – Intermediate for herbicides and crop‑protection agents.
- Organic synthesis – Versatile building block for fine chemicals, esters, and polymers.
- Scientific research – Model compound for studying microbial metabolism and gut‑microbiome interactions.
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Product Specifications & Quality Assurance
Our 4‑Methylvaleric Acid Liquid is manufactured to meet stringent purity and consistency standards.
| Parameter | Specification |
|---|---|
| Purity (GC) | ≥98.0% (≥99.0% premium grade available) |
| CAS Number | 646-07-1 |
| Molecular Formula | C₆H₁₂O₂ |
| Molecular Weight | 116.16 g/mol |
| Appearance | Colorless to pale yellow, clear liquid |
| Density | 0.921–0.923 g/mL at 25 °C |
| Boiling Point | 199–201 °C |
| Melting Point | –35 °C |
| Refractive Index | n²⁰/D 1.41200–1.41700 |
| FEMA Number | 3463 (GRAS flavoring substance) |
| Odor Threshold | 0.0004 ppm (pungent, cheese) |
| Solubility | Slightly soluble in water; miscible with organic solvents |
Key advantages:
- High potency – The branched‑chain structure produces a higher perceived cheese intensity at low concentrations, reducing material cost and off‑notes.
- Nature‑identical – Recognized by FEMA and JECFA as GRAS, providing a straightforward regulatory pathway for global compliance.
- Multi‑industry versatility – The same raw material serves food, fragrance, pharma, and industrial applications.
Supply capability – Monthly production capacity allows us to scale with your business. Packaging options range from 1 kg laboratory bottles to 25 kg drums, 200 kg drums, and ISO tank containers.
Sourcing & Partnership Guide
When you choose Xi'an Huilin Biological Technology as your partner for 4‑Methylvaleric Acid Liquid, you gain:
1. Complimentary Samples & Technical Support
Request a free sample for internal testing. Our technical team can advise on dissolution, blending, stability, and compatibility with your specific carrier oils or solvents.
2. Certificate of Analysis & Regulatory Documentation
Every batch is tested by accredited third‑party labs. We supply:
- Certificate of Analysis (COA) with GC purity verified against known standards.
- Material Safety Data Sheet (MSDS) compliant with REACH, CLP, and GHS.
- Specification sheets detailing the physical and chemical properties of each lot.
- Allergen & GMO statements documenting freedom from common allergens.
3. Flexible Packaging
We support both large‑volume industrial demands and specialized small‑batch orders. Standard packaging: 1 kg, 5 kg, 25 kg, 200 kg drums, ISO tank containers. Pre‑aliquoted vials available for test runs.
4. Reliable Supply Chain
With warehouses near major ports, we keep lead times short and predictable. We have experience navigating export logistics, customs clearance, and international shipping protocols.
5. Industry‑Focused Expertise
Our team understands GMP, Halal/Kosher certifications, and regional food additive regulations, helping you streamline supply‑chain compliance.
Why Choose Xi'an Huilin Biological Technology?
We are more than a chemical distributor; we are a solution partner for formulators, procurement specialists, and brand owners who require purity, traceability, and consistency.
- Quality assurance – All incoming raw materials are quarantined and tested. Batch‑number traceability from source to your dock.
- Fast response – Queries answered within 24 business hours. Real‑time warehouse stock checks.
- Global export experience – Clients across North America, Europe, Southeast Asia, and the Middle East. Full documentation and labeling support.
Conclusion
From the sharp tang of aged Cheddar to the subtle grounding notes of a leather perfume, 4‑methylvaleric acid provides the aroma and flavor intensity that make a product memorable. Its high potency, natural identity, and versatile chemical structure make it an essential tool in the flavor & fragrance raw material kit.
When you source from Xi'an Huilin Biological Technology, you gain more than just a high‑purity raw material-you gain a partner committed to transparency, reliability, and technical support.
Ready to elevate your flavor profiles or find a reliable industrial intermediate? Contact us today to request a sample, ask for a quote, or speak with our technical experts about your specific project requirements.
Frequently Asked Questions
Q: Is 4‑methylvaleric acid considered safe to use as a food flavoring ingredient?
A: Yes. The U.S. FEMA Expert Panel has assigned it FEMA number 3463 and listed it as GRAS (Generally Recognized as Safe) for specific usage levels in food products.
Q: What odor does 4‑methylvaleric acid have?
A: It has a pungent, penetrating cheese‑like odor with sour and overripe undertones. At very low concentrations (odor threshold ~0.0004 ppm), it imparts a sharp, aged-cheese character.
Q: What packaging sizes are available?
A: We offer 1 kg, 5 kg, 25 kg, and 200 kg drums, ISO tank containers, and pre‑aliquoted vials for test runs.
Q: Can I get a Certificate of Analysis before placing an order?
A: Yes. We supply COA, MSDS, specification sheets, and other regulatory documents upon request.
Q: What industries use 4‑methylvaleric acid?
A: Food & beverage flavoring, fragrance & perfumery, pharmaceutical synthesis, agrochemicals, and specialty chemical manufacturing.
Q: What's the difference between 4‑methylvaleric acid and 4‑methylpentanoic acid?
A: No difference-they are two names for the same compound. 4‑Methylpentanoic acid is the systematic IUPAC name; 4‑methylvaleric acid is the traditional name derived from valeric acid. Both refer to C₆H₁₂O₂, CAS 646-07-1.
Q: Is 4‑methylvaleric acid a natural flavoring substance?
A: Yes. It occurs naturally in many foods, including cheese, apples, strawberries, lamb fat, and blue cheese. The commercially available material is typically nature‑identical (synthetic but chemically identical) and recognized as GRAS by FEMA.
References
① HMDB (Human Metabolome Database)
Isocaproic acid (4‑methylvaleric acid) is a metabolite of 20α‑hydroxycholesterol and participates in the conversion of cholesterol → pregnenolone → DHEA in the early‑pregnancy placenta. Supporting literature: PMID 14446007, PMID 11972299.
🔗 HMDB entry HMDB0000689
② CHEBI (Chemical Entities of Biological Interest, EMBL‑EBI)
4‑Methylpentanoic acid (isocaproic acid) is defined as a methyl‑branched fatty acid with a methyl branch at position 4. It is a metabolite of 20α‑hydroxycholesterol. CHEBI ID: 74903.
🔗 CHEBI:74903
③ FEMA GRAS status (background information)
FEMA (Flavor and Extract Manufacturers Association) has assigned substance number 3463 to 4‑methylvaleric acid and determined it to be Generally Recognized as Safe (GRAS) for use as a flavoring ingredient at customary levels. This status is widely cited in the flavor industry and regulatory reference works. (No public original document available for direct linking.)
This article is for informational purposes only. Readers should conduct their own regulatory and safety assessments for their specific applications.