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Name
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L-Tyrosine
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|---|---|
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Synonyms
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3-(4-HYDROXYPHENYL)-L-ALANINE;
2-Amino-3-(4-hydroxyphenyl)-propanoic acid;
2-AMINO-3-(P-HYDROXYPHENYL)PROPIONIC ACID;
4-HYDROXYPHENYLALANINE;
FEMA 3736;
H-L-TYR-OH;
H-TYR-OH;
L-3-[4-HYDROXYPHENYL]ALANINE
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|
CAS
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60-18-4
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Molecular Formula
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C9H11NO3
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|
Molecular Weight
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181.19
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|
EINECS
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200-460-4
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Melting Point
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>300 °C (dec.) (lit.)
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|
Specific Optical Rotation
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-11.65 ° (c=5, DIL HCL/H2O 50/50)
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|
Boiling Point
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314.29°C (rough estimate)
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|
Bulk Density
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300kg/m³
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|
Density
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1.34
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|
Refractive Index
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-12 ° (C=5, 1mol/L HCl)
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|
FEMA
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3736
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Flash Point
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176 °C
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|
Storage Conditions
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Store below +30°C.
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Solubility
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1M HCl: 25 mg/mL
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|
Form
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Powder
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Acid Dissociation Constant (pKa)
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2.2 (at 25°C)
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|
Color
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White to light brown
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pH Value
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6.5 (0.1g/L, H2O)
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|
Odor (Odor)
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Odorless
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Fragrance Type
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odorless
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Biological Source
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rabbit
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Optical Rotation (Optical Rotation)
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[α]20/D 11.5±1.0°, c = 4% in 1 M HCl
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|
Water Solubility
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0.45 g/L (25 °C)
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|
Usage
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Pharmaceutical Field: L-tyrosine is an amino acid drug and can be used as a raw material for amino acid infusions and compound amino acid preparations. It is applied in the treatment of diseases such as poliomyelitis, tuberculous encephalitis, and hyperthyroidism.
Food Field: L-tyrosine serves as a nutritional supplement, which can effectively replenish tyrosine required by the human body, maintain the normal physiological functions of the human body, and promote metabolism. In addition, it can be used as a food flavoring agent-when heated together with carbohydrates, it undergoes an amino-carbonyl reaction to produce substances with a unique fragrance, thereby adding a distinctive flavor to various foods and enhancing the taste experience.
Cosmetics and Skincare Field: L-tyrosine is a crucial raw material for melanin synthesis. In the human body, tyrosine can be oxidized to dopaquinone under the action of tyrosinase, and eventually form eumelanin. In the research and development of whitening cosmetics, tyrosinase structural analogs that compete with tyrosine can be synthesized through research to effectively inhibit the production of melanin, thereby achieving a whitening effect.
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