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  • Chemical Name: L-Tyrosine
  • CAS No.:60-18-4
  • MF:C9H11NO3
  • MW:181.19
  • Purity:98% or according to customer requirements
  • Color:White
  • Product Categories: Amino Acids;alpha-Amino Acids;Biochemistry;Nutritional Supplements;L-Amino Acids
  • Test method: HPLC


What is L-Tyrosine?

L-Tyrosine is the levorotatory isomer of the aromatic amino acid tyrosine. L-tyrosine is a naturally occurring tyrosine and is synthesized in vivo from L-phenylalanine. It is considered a non-essential amino acid; however, in patients with phenylketonuria who lack phenylalanine hydroxylase and cannot convert phenylalanine into tyrosine, it is considered an essential nutrient. In vivo, tyrosine plays a role in protein synthesis and serves as a precursor for the synthesis of catecholamines, thyroxine, and melanin.

Basic information

Product Name: L-Tyrosine

tyrosine; p-Tyrosine; Tyrosinum; Tyrosine; Tirosina

CAS: 60-18-4
MF: C9H11NO3
MW: 181.19
EINECS: 200-460-4
Product Categories: Amino Acids; alpha-Amino Acids; Biochemistry; Nutritional Supplements; L-Amino Acids Inhibitors
Chemical Structure


Chemical Properties   

Melting point  >300 °C (dec.) (lit.)
alpha  -11.65 º (c=5,DIL HCL/H2O 50/50)
Boiling point  314.29°C (rough estimate)
density  1.34
refractive index  -12 ° (C=5, 1mol/L HCl)
Fp  176 °C
storage temp.  Store below +30°C.
solubility  1 M HCl: 25 mg/mL
pka 2.2(at 25℃)
form  powder
color  White to Pale-brown
PH 6.5 (0.1g/l, H2O)
optical activity [α]20/D 11.5±1.0°, c = 4% in 1 M HCl
Water Solubility  0.45 g/L (25 ºC)
Merck  14,9839
JECFA Number 1434
BRN  392441
Stability: Stable. Incompatible with strong oxidizing agents, strong reducing agents.
Usage And Synthesis 

Tyrosine is an amino acid building blocks of proteins, and having a side chain having an aromatic ring of ionization, is addicted to the aqueous, tyrosine in the human and animal bodies is generated by the hydroxylation of phenylalanine, so when phenylalanine nutrition is adequate, it is non essential amino acid.


Tyrosine Functions          

Tyrosine is a non-essential amino acid, it has the function of regulating mood and stimulating the nervous system. In addition, it helps speed up the body’s metabolism and treat chronic fatigue and other diseases.

The body needs enough tyrosine to produce many important brain chemicals in order to help regulate appetite, pain sensitivity, and the body’s response to stress. It is also required for normal thyroid, pituitary and adrenal function. Low levels of tyrosine may cause problems such as thyroid function decline, low blood pressure, chronic fatigue, and slow metabolism.

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MSDS: MSDS available.

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