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.
1. Basic Product Profile
- Full IUPAC Name: (1E,6E)-1,7-bis(4-hydroxy-3-methoxyphenyl)hepta-1,6-diene-3,5-dione
- Aliases: Curcumin I, Turmeric Yellow, Natural Curcumin
- CAS Number: 458-37-7
- EINECS: 207-280-5
- Molecular Formula: C21H20O6
- Molecular Weight: 368.38
- Chemical Classification: Natural polyphenolic diketone plant extract, antioxidant raw material, food colorant, cosmetic active ingredient, health care supplement, pharmaceutical intermediate
- Core Advantages
Natural active pigment extracted from turmeric rhizome, with strong antioxidant, anti-inflammatory, antibacterial and lipid-regulating bioactivity. Dual diketone conjugated structure endows excellent free radical scavenging capacity. Widely applied as natural food yellow colorant, anti-aging skincare additive, functional health food raw material and synthetic anti-inflammatory drug precursor.
2. Physical & Chemical Properties
2.1 Physical Index
- Appearance: Orange-yellow crystalline powder
- Odor: Slight characteristic turmeric aroma
- Solubility: Insoluble in water; soluble in ethanol, methanol, acetone, DMSO, alkaline aqueous solution; slightly soluble in vegetable oils
- Melting Point: 182–185 °C
- pH (ethanol saturated solution): Neutral
- Hygroscopy: Non-hygroscopic under dry storage
- UV characteristic: Strong absorption peaks at 260 nm and 425 nm
2.2 Chemical Properties
- Molecular structure: Conjugated β-diketone backbone, two phenolic hydroxyl groups and two methoxy substituents on benzene rings
- pH sensitivity: Turns bright red under alkaline conditions; stable in acidic and neutral environments
- Antioxidant activity: Phenolic hydroxyl groups capture reactive oxygen free radicals; diketone enol form enhances stability
- Light sensitivity: Decomposes and fades under long-term strong UV irradiation, must be stored light-proof
- Thermal stability: Stable below 100°C; long-time heating above 140°C causes color fading and decomposition
- Acid & Alkali Stability: Stable pH 3–7; rapid color change and degradation in pH＞9 strong alkaline environment
- Compatibility: Compatible with plant oils, ethanol, most cosmetic emollients; incompatible with strong oxidants, concentrated alkali
3. Main Application Fields
3.1 Food Industry (Core Usage)
- Natural food colorant for baked goods, beverages, sauces, meat products; replaces synthetic yellow pigments;
- Natural food antioxidant preservative to extend shelf life of edible oils and snacks.
3.2 Health Care & Nutraceutical Raw Material
Functional supplement raw material with anti-inflammatory, liver-protecting, blood lipid regulating and antioxidant effects; raw material for oral curcumin soft capsules and tablets.
3.3 Cosmetic & Personal Care Active
Anti-aging, anti-inflammatory, brightening active ingredient for serum, cream, mask; relieves sensitive redness, inhibits melanin deposition.
3.4 Pharmaceutical Intermediate & Biochemical Reagent
- Precursor for anti-inflammatory, anti-tumor auxiliary pharmaceutical preparations;
- Standard reference substance for plant polyphenol detection and turmeric extract quality control.
4. Quality Specification Table
| Test Item | Standard Index |
| CAS No. | 458-37-7 |
| Molecular Formula | C21H20O6 |
| Molecular Weight | 368.38 |
| Appearance | Orange-yellow crystalline powder |
| HPLC Purity | Food Grade ≥95.0%; High Purity ≥98.0%; Pharma Grade ≥99.0% |
| Moisture Content (KF) | ≤0.50% |
| Total Ash | ≤0.20% |
| Heavy Metals (Pb) | ≤10 ppm (Food Grade ≤2 ppm) |
| Arsenic (As) | ≤2 ppm |
| Residue on Ignition | ≤0.10% |
| Bulk Package | 25kg aluminum foil lined fiber drum |
| Sample Package | 100g / 1kg light-proof sealed plastic bottle |
| Storage Requirements | Hermetic light-proof cool dry warehouse ≤25℃; isolate sunlight, high temperature and alkaline substances |
| Transportation Rule | Natural plant extract raw material; light-proof moisture-proof sealed packaging required during transit |
| Shelf Life | 36 months under intact sealed packaging |
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