Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
Basic Information
Product Name: Caffeic acid
CAS Number: 331-39-5
Alias: 3,4-Dihydroxycinnamic acid
Molecular Formula: C9H8O4
Molecular Weight: 180.16
IUPAC Name: (2E)-3-(3,4-dihydroxyphenyl)prop-2-enoic acid
Structural Information
- Structure Type: Natural phenolic cinnamic acid derivative
- Structural Features: Contains ortho-diphenol group and α,β-unsaturated carboxylic acid double bond; strong free radical scavenging capacity, easy to oxidize under light and alkaline environment
Physical & Chemical Properties
- Appearance: Light yellow crystalline powder
- Odor: Odorless
- Melting Point: 196–198 °C (decomposition)
- Solubility: Slightly soluble in cold water, soluble in hot water, ethanol, methanol, acetone; soluble in alkaline aqueous solution; insoluble in chloroform, petroleum ether
- Stability: Unstable under strong light and high temperature, easy oxidation discoloration; stable under weak acid conditions; reacts with metal ions to form colored complexes
Synthesis & Applications
Production Method
- Plant extraction: Separated from coffee, propolis, eucommia leaves, chrysanthemum
- Chemical synthesis: Condensation of protocatechuic aldehyde with malonic acid
Main Applications
- Cosmetic raw material: Antioxidant, brightening, anti-photoaging additive
- Health care raw material: Antioxidant nutritional supplement, auxiliary raw material for cardiovascular care products
- Food additive: Natural antioxidant for edible oil, beverage and baked food
- Pharmaceutical intermediate: Raw material for anti-inflammatory, antiviral and liver-protecting drug research
Safety & Storage Instructions
- Hazard Classification: Low toxicity, dust slightly irritates eyes and respiratory tract
- Personal Protection: Dust mask, nitrile gloves and goggles, operate in ventilated environment
- Storage Condition: Hermetically sealed, cool dark dry warehouse, isolate alkaline substances and metal salts
- Transportation: General plant extract raw material, avoid direct sunlight and dampness
Quality Specifications
- Purity: ≥98.0% (HPLC)
- Loss on Drying: ≤0.5%
- Residue on Ignition: ≤0.1%
- Heavy Metal (Pb): ≤10 ppm
Information Summary Table
| Item | Specification |
| CAS Number | 331-39-5 |
| Product Name | Caffeic acid |
| Synonym | 3,4-Dihydroxycinnamic acid |
| Molecular Formula | C9H8O4 |
| Molecular Weight | 180.16 |
| Appearance | Light yellow crystalline powder |
| Melting Point | 196–198°C (decompose) |
| Solubility | Soluble in hot water and alcohols, soluble in alkali solution |
| Purity Standard | ≥98.0% |
| Storage Condition | Sealed cool dark storage, keep away from alkali and metal ions |
| Hazard Property | Low toxicity, dust mild irritant to eyes and respiratory tract |
| Main Usage | Cosmetic antioxidant, health supplement, natural food preservative, pharmaceutical research intermediate |
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