Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Product Description
trans,trans-2,4-Heptadienal (CAS: 4313-03-5), also called (E,E)-2,4-Heptadienal, is an unsaturated aldehyde with a grassy, fruity and spicy aroma. It is widely used as a food flavoring, biochemical reagent and organic intermediate, existing as a light yellow to brown liquid at room temperature.
Molecular Formula & Structure
Molecular Formula: C?H??O
Physical Properties
- Appearance: Light yellow to brown clear liquid with characteristic aroma
- Melting Point: Not determined (N/A)
- Density: ~0.88 g/cm3 (room temperature)
- Boiling Point: 84–84.5 °C (atmospheric pressure); 177.4 ± 9.0 °C at 760 mmHg
- Solubility: Insoluble in water; soluble in ethanol and common organic solvents
- Stability: Stable under normal conditions; sensitive to high temperature, sunlight and strong oxidants/reducing agents
- Volatility: Moderate, with perceptible aroma
Chemical Properties
- CAS Number: 4313-03-5 (confirmed)
- Chemical Type: Unsaturated aldehyde, food flavoring, biochemical reagent, organic intermediate
- Molecular Weight: ~110.15
- Chemical Characteristics: Contains two trans double bonds and an aldehyde group, prone to addition, oxidation and reduction reactions
- Application Type: Food flavoring (fruit/spicy flavors), biochemical reagent, organic synthesis intermediate
- Toxicity: Low, GRAS under FEMA; mild skin/mucous membrane irritation
Synthesis Method
- Raw Materials: Heptadienoic acid, LiAlH?, MnO?; or trans-2-hexenoic acid, iodomethane
- Synthesis Route: Reduce heptadienoic acid to heptadienol with LiAlH?, then oxidize with MnO? to get the product; alternative routes are available
Storage & Safety
- Storage: Sealed, cool, dry and ventilated; refrigerated (~4 °C); avoid sunlight, high temperature and incompatible substances
- Package: Sealed, light-proof containers with clear labels
- Safety: Ventilated operation; wear protective equipment; avoid contact with skin/eyes
- Hazard: Mild irritation; non-flammable; large leakage may pollute the environment
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