A complete grasp of fumaric acid’s physical, chemical and application-related functional properties helps manufacturers select suitable raw material grades for food, feed, pharmaceutical and industrial formulations. Its core characteristics are categorized into three major dimensions: physical properties, chemical structural & reactive properties, and functional performance in end-use sectors.Raw material suppliers such as NORBIDAR provide standardized fumaric acid grades complying with global food and industrial raw material specifications for bulk and custom order production.
Key Takeaways
- Fumaric acid is an odorless white crystalline powder with a sharp tart taste; it exhibits excellent room-temperature chemical stability and low spontaneous degradation risk, suitable for food additives and industrial resin synthesis.
- Its trans geometric isomer structure delivers higher thermal and chemical stability compared with cis maleic acid, with stronger intramolecular bonds and lower molecular strain.
- As a multi-functional acidulant and crosslinking monomer, it is widely applied in food & beverage acidification, livestock feed conditioning, unsaturated polyester resin manufacturing and mild personal care formulations.
Physical Properties of Fumaric Acid
Appearance and Density
Fumaric acid exists as uniform fine white crystalline powder with consistent particle morphology, which supports homogeneous blending in mixed formulations. Its relative density is recorded as 1.635 g/cm³ per ICSC 1173 chemical safety data sheet. Uniform particle density simplifies accurate weighing, mixing and long-term sealed warehouse storage without uneven stratification.Standardized industrial and food-grade fumaric acid maintains stable physical indicators across production batches. Raw material suppliers supply batches that meet EP/USP purity thresholds to guarantee consistent performance in food, feed and polymer manufacturing.
Melting Point and Thermal Stability
Per standardized thermal testing data, fumaric acid decomposes upon heating without simple melting under atmospheric pressure:
- Thermal transition threshold: >213°C, starts intramolecular dehydration;
- Above 230°C, dehydration generates maleic anhydride as the primary breakdown product;
- Complete thermal decomposition occurs near 350°C.PropertyStandard Value (ICSC 1173)Thermal characteristicNo clear melting point under normal pressure; dehydration decomposition above 213°CRoom-temperature stabilityFully stable under dry, sealed ambient storage conditionsPrimary high-temperature decomposition productMaleic anhydride (generated above 230°C)
Its wide room-temperature stable range makes it compatible with most low-to-medium temperature industrial processing workflows.
Solubility and Sensory Characteristic
Aqueous solubility at 25°C: 6.3 g/L (low cold-water solubility, per ECHA registration dossier). It dissolves slowly in cold aqueous systems and achieves full dissolution under heating, making it more suited for dry instant powder mixes rather than cold ready-to-drink beverages.
It delivers a clean, persistent tart sensory profile without masking natural fruit flavors, widely adopted as an acidulant in confectionery, baked goods and reconstituted beverage powders.
Consistent particle and purity standards ensure stable solubility and uniform sensory performance across production batches.
Chemical Properties of Fumaric Acid
Molecular Formula and Structure
The molecule contains two carboxylic acid groups attached to a trans carbon-carbon double bond. Fumaric acid and maleic acid are cis-trans geometric isomers: maleic acid carries two carboxylic groups on the same side of the double bond, while fumaric acid adopts a trans symmetrical layout. This trans structure reduces internal molecular strain and greatly improves overall chemical stability.
| Property | Value |
|---|---|
| Molecular Formula | C4H4O4 |
| Molecular Weight | 116.07 g/mol |
Acidity and Typical Chemical Reactions
Fumaric acid is a weak organic dicarboxylic acid with two dissociation constants: pKa₁=3.02, pKa₂=4.38. Compared with maleic acid, it exhibits weaker instantaneous hydrogen ion dissociation, delivering mild buffered acidity ideal for food and feed formulations.
Its core industrially valuable chemical reactions are listed below:
| Reaction Type | Description |
|---|---|
| Esterification | Forms diesters with alcohols, used in many applications. |
| Polymerization | Joins with other monomers to make resins for industry. |
| Hydrogenation | Converts to succinic acid, important in biodegradable plastics. |
| Complexation | Binds with metals, such as iron fumarate for supplements. |
| Photoreactivity | Resists UV light, making it stable in sunlight. |
Stability Comparison with Maleic Acid
The trans molecular structure of fumaric acid creates lower internal molecular strain and more robust intermolecular bonding, resulting in superior thermal, light and storage stability versus cis maleic acid.
| Property | Fumaric Acid | Maleic Acid |
|---|---|---|
| Molecular Configuration | Trans configuration | Cis configuration |
| Stability | More stable, less strain | Less stable, more strain |
| Melting Point | Higher | Lower |
| Reactivity | Less reactive | More reactive |
| Bonding | Stronger interactions | Weaker interactions |
| Applications | Stable uses in food, feed, industry | Breaks down faster, used in resins |
Fumaric acid biosynthesis and synthesis are important in nature and industry. They help with many reactions and products.
Fumaric Acid in Applications
Food and Beverage Applications
Fumaric acid is an approved regulated acidulant (INS E297, FDA GRAS, JECFA ADI 0–6 mg/kg bw daily). It delivers sustained tartness, pH buffering and mild microbial inhibition to extend shelf life. Its low cold-water solubility makes it ideal for dry bakery mixes, instant fruit powder, hard candy and jelly formulations; it reacts with carbonate leavening agents to release CO₂ for baked goods expansion.
| Application Category | Usage Percentage (2025) | Key Applications |
|---|---|---|
| Food Additives | 39.7% | Acidulant, preservative, pH modifier in bakery, beverage, dairy, and instant foods |
Food-grade fumaric acid from suppliers such as NORBIDAR complies with EFSA and FDA additive purity standards for large-scale food manufacturing production.
Animal Nutrition Applications
As a feed acidifier, fumaric acid optimizes gastrointestinal pH balance for livestock, supports beneficial intestinal flora reproduction and improves feed nutrient digestibility. It partially replaces antibiotic growth promoters in compliant farming systems and reduces methane emission from ruminants to lower agricultural carbon footprints. Feed-grade fumaric acid meets global feed additive regulatory limits for poultry, swine and aquaculture production.
Industrial & Personal Care Formulations
- Industrial polymer sector: Core crosslinking monomer for unsaturated polyester, alkyd resins and protective coatings, boosting composite tensile strength, thermal resistance and chemical barrier performance for construction, automotive and marine composite parts.
- Personal care: Diluted low-concentration fumaric acid functions as a mild pH adjuster in wash-off skincare formulations; undiluted concentrated raw material may trigger mild skin irritation upon prolonged direct contact.
Critical medical distinction: Pure fumaric acid raw material used in food, feed and industrial supplies has no direct therapeutic efficacy for psoriasis, multiple sclerosis or oncology treatment. Clinical therapeutic effects are exclusive to high-dose prescription fumarate ester active pharmaceutical ingredients, which are chemically separate finished drugs produced via dedicated pharmaceutical synthesis workflows.
Industrial and cosmetic grade fumaric acid from suppliers including NORBIDAR meets unified impurity control standards for non-pharmaceutical downstream manufacturing.
FAQ
What role does fumaric acid play in metabolism?
Fumaric acid is important in metabolism. It helps cells make energy. It works in the citric acid cycle and other body processes.
How does fumaric acid metabolism affect therapeutic effects?
Fumaric acid changes how cells use energy. These changes can help lower swelling. They also help the immune system and may slow tumor growth.
Can fumaric acid be used for therapeutic purposes?
Scientists are looking at fumaric acid for treatments. Its effects on the body may help with skin problems. It may also help the immune system and some therapies.
