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Phenylalanine (63-91-2) C9H11NO2

  • Chemical Name: L-Phenylalanine
  • CAS No.:63-91-2
  • MF:C9H11NO2
  • MW:165.19Purity:>98% or As customer requested
  • Color:White to off-white
  • Product Categories:Amino Acids;Biochemistry;Nutritional Supplements; Pharmaceuticals
  • Test method: HPLC

What is Phenylalanine?

Phenylalanine is an essential aromatic amino acid in humans (provided by food), Phenylalanine plays a key role in the biosynthesis of other amino acids and is important in the structure and function of many proteins and enzymes. Phenylalanine is converted to tyrosine, used in the biosynthesis of dopamine and norepinephrine neurotransmitters. The L-form of Phenylalanine is incorporated into proteins, while the D-form acts as a painkiller. Absorption of ultraviolet radiation by Phenylalanine is used to quantify protein amounts. (Source: NCI Thesaurus (NCIt))

L-phenylalanine is the L-enantiomer of phenylalanine. It has a role as a nutraceutical, a micronutrient, an Escherichia coli metabolite, a Saccharomyces cerevisiae metabolite, a plant metabolite, an algal metabolite, a mouse metabolite, a human xenobiotic metabolite and an EC (alkaline phosphatase) inhibitor. It is an erythrose 4-phosphate/phosphoenolpyruvate family amino acid, a proteinogenic amino acid, a phenylalanine and a L-alpha-amino acid. It is a conjugate base of a L-phenylalaninium. It is a conjugate acid of a L-phenylalaninate. It is an enantiomer of a D-phenylalanine. It is a tautomer of a L-phenylalanine zwitterion. (Source: ChEBI)

Basic information 
Product Name: L-Phenylalanine
Synonyms: L-beta-Phenylalanine 99 %;L-AminobenzenepropanoicAcid; L-Phenylalanin; phenylalanine; 3-Phenyl-L-alanine; 3-Phenylalanine; Phenylalanine USP
CAS: 63-91-2
MF: C9H11NO2
MW: 165.19
EINECS: 200-568-1
Product Categories: Amino Acids; Biochemistry; Nutritional Supplements; Pharmaceuticals; Amino;
Chemical Structure


Chemical Properties    
Melting point  270-275 °C (dec.)(lit.)
alpha  -34.1 º (c=2, water, dry basis)
Boiling point  293.03°C (rough estimate)
density  1.29
vapor pressure  <1 Pa (25 °C)
refractive index  -34 ° (C=2, H2O)
storage temp.  Store below +30°C.
solubility  H2O: 0.1 M at 20 °C, clear, colorless
form  powder
pka 2.2(at 25℃)
color  White to off-white
PH 5.0-7.0 (25℃, 0.1M in H2O)
optical activity [α]25/D -34.2°, c = 2 in H2O (dried basis)
Water Solubility  1-5 g/100 mL at 25 ºC
JECFA Number 1428
Merck  14,7271
BRN  1910408
Stability: Stable. Incompatible with strong oxidizing agents.
Usage And Synthesis
Chemical Properties White crystalline powder
Uses phenylalanine is a conditioning agent with greater application in hair care than in skin care preparations. It is also used in suntan products.

Phenylalanine Uses

L-Phenylalanine is an aromatic amino acid with physiological activity. It is one of the essential amino acids that humans and animals cannot synthesize naturally by themselves. It is an important component of compound amino acid infusion;

Used in medicine, it is the intermediate of amino acid anticancer drugs such as phenylalanine, sarcolysin formate, and the raw material for the production of epinephrine, thyroxin and melanin; Studies have shown that L-phenylalanine can be used as an anticancer. The drug carrier directly introduces the drug molecule into the tumor area, and its effect is 3 to 5 times that of other amino acids. This can not only inhibit the growth of cancer, but also reduce the side effects of drugs.

MSDS: MSDS available.

COA: COA can be available if you send us inquiry.

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