L-Tyrosine

                                   
It is involved in the synthesis of numerous proteins in the human body; it is an important precursor substance for the synthesis of neurotransmitters; it is a raw material for the synthesis of thyroid hormones (such as thyroxine, T4); it has potential application value in the treatment of certain neurological diseases.

Adjuvant treatment for depression; in the field of skin care, by regulating the activity of L-tyrosine, it can control the synthesis of melanin, achieving the effect of whitening; it is also helpful for the health of hair, as it can participate in the synthesis of keratin, which is the main component of hair, and helps to maintain the strength and elasticity of hair.

【Common Name】L-Tyrosine   【Molecular Formula】C₉H₁₁NO₃    【Molecular Weight】181.19

【Physical and Chemical Properties】The appearance is a white to off-white crystalline powder, which is extremely insoluble in water. At 25℃, its water solubility is 0.45g/L; it is soluble in dilute hydrochloric acid and dilute nitric acid, but insoluble in organic solvents such as anhydrous ethanol, methanol, and acetone. Melting point > 300℃ (decomposition), boiling point is 385.2 ± 32.0℃ (760mmHg), density: 1.3 ± 0.1g/cm³, absorbs ultraviolet rays.

【Category】Non-essential amino acid

【Storage Conditions】Store in a cool, dry, dark, and sealed environment.


	

		

			

			
Inspection items
			
			

			
Enterprise standards
			
			

			
Inspection items
			
			

			
Enterprise standards
			
		
		

			

			
Appearance
			
			

			
White crystals or crystalline powder
			
			

			
Heavy Metal(On a Pb basis)
			
			

			
≤10ppm
			
		
		

			

			
Purity W/%
			
			

			
≥99.0-100.5
			
			

			
Arsenic (on an AS basis)
			
			

			
≤1ppm
			
		
		

			

			
Specific rotation
			
			

			
+11.3°~+12.1°
			
			

			
Dry weight loss W/%
			
			

			
≤0.2
			
		
		

			

			
Translucent
			
			

			
≥95%
			
			

			
Ash residue W/%
			
			

			
≤0.1
			
		
		

			

			
Chloride
			
			

			
≤200ppm
			
			

			
pH
			
			

			
5.0-6.5
			
		
		

			

			
Sulfate
			
			

			
≤200ppm
			
			

			
Ammonium salt
			
			

			
≤200ppm
			
		
		

			

			
Iron salt
			
			

			
≤10ppm