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 Information
Name: L-Tyrosine
Alias: 4-Hydroxy-L-phenylalanine
CAS No.: 60-18-4
Molecular Formula: C9H11NO3
Molecular Weight: 181.19
2. Physical and Chemical Properties
Physical Properties
- Appearance: White crystalline powder
- Odor: Odorless, slightly bitter taste
- Solubility: Slightly soluble in cold water, soluble in hot water; insoluble in ethanol, acetone, ether
- Melting Point: 343–345 °C (decomposes)
- Specific Rotation: [α]D2? -10.0° ~ -12.0° (1mol/L HCl solution)
- Hygroscopicity: Non-hygroscopic under normal humidity
- Crystal form: Orthorhombic flaky crystal
Chemical Properties
- Molecular structure: L-type aromatic amino acid, benzene ring with para hydroxyl group, contains amino and carboxyl functional groups
- Phenolic hydroxyl characteristic: Turns blue-purple when reacting with ferric ion solution
- Optical activity: Only L-form has biological activity; D-tyrosine cannot be absorbed by human body
- Oxidation susceptibility: Phenolic group easily oxidized by air, strong oxidants to form brown quinone impurities
- Acid-base amphoterism: Amphiprotic substance, soluble in dilute acid and dilute alkali to form corresponding salts
- Thermal stability: Stable below 180 °C; high temperature triggers decarboxylation and decomposition
- Compatibility: Compatible with most amino acids, food and cosmetic raw materials; incompatible with strong oxidants, heavy metal ions
3. Main Application Fields
1. Health Food & Nutritional Supplement (Core Application)
- Precursor for synthesizing dopamine, adrenaline, melanin; relieve fatigue, improve mental focus
- Amino acid fortifier for sports nutrition, brain health functional food
2. Pharmaceutical Raw Material
- Raw material for amino acid infusion, oral compound amino acid preparations
- Synthetic intermediate for thyroid hormone, neurotransmitter related APIs
3. Cosmetic Active Raw Material
Melanin synthesis regulator for skin brightening and sun care formulations
4. Biochemical Culture Medium
Essential nitrogen source for microbial fermentation and cell culture
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 60-18-4 |
| Molecular Formula | C9H11NO3 |
| Molecular Weight | 181.19 |
| Appearance | White crystalline powder |
| HPLC Purity | Food/Pharma Grade ≥99.0%; Reference Standard ≥99.5% |
| Water Content (KF) | ≤0.30% |
| Residue on Ignition | ≤0.10% |
| Heavy Metals (Pb) | ≤10 ppm |
| Arsenic (As) | ≤2 ppm |
| Packaging | 25kg PE lined fiber drum, nitrogen-filled aluminum foil inner bag |
| Storage Condition | Hermetic dry warehouse below 25 °C; avoid strong light and oxidizing environment |
| Transportation Requirement | Amino acid solid, dust-proof sealed packaging |
| Shelf Life | 36 months under intact sealed packaging |
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