Tyrosine is an amino acid, which is a building block of protein that occurs naturally in the body. Tyrosine can also be found in certain foods such as meat, fish, eggs, dairy products, beans, nuts, oats, and wheat.
Some people have low levels of tyrosine in their bodies because of a hereditary condition called phenylketonuria(PKU). In people with PKU, the body cannot process an amino acid called phenylalanine, which the body needs to produce tyrosine.
Tyrosine is given as a supplement to increase tyrosine levels in people with PKU.
| Chemical Name： | 3-(4-Hydroxyphenyl)-L-alanine |
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Structure Formula： |
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Molecular Formula： |
C9H11NO3 |
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Molecular Weight： |
181.19 |
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Cas No： |
[60-18-4] |
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Characteristics： |
White, styli form crystals with bitterness, soluble in dilute acids or base |
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Quality Standards： |
USP24, AJI97 and etc. |
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Item |
Specifications |
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USP24 |
AJI97 |
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Appearance |
White crystals or crystalline powder; tasteless |
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Assay,% |
98.5~101.5 |
99.0~101.0 |
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Specific optical rotation |
-9.8°~ -11.2° |
-11.3°~ -12.1° |
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Transmittance, % |
- - - |
≥98.0 |
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Heavy Metals (as Pb), % |
≤0.001 |
≤0.001 |
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pH value |
- - - |
5.0~6.5 |
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Loss on drying, % |
≤0.3 |
≤0.2 |
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Residue on ignition, % |
≤0.4 |
≤0.1 |
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Chloride (as Cl),% |
≤0.04 |
≤0.02 |
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Ammonium (as NH4),% |
- - - |
≤0.02 |
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Sulfate (as SO4), % |
≤0.04 |
≤0.02 |
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Iron, % |
≤0.003 |
≤0.001 |
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Arsenic (as As), % |
≤0.0001 |
≤0.0001 |
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Other amino acids |
- - - |
Not detd. |
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Organic volatile impurities |
Meets the requirement |
- - - |
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The Characteristics and Uses： |
One of essential materials to prepare all kinds of medicine such as L-topa |
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Package and Transport： |
Packed with a polyethylene bag for the inner layer and a Kraft paper board barrel for the outer layer, net weight 25kg/drum. Packaging may be arranged according to the requirement of the client. Handle with care in order to avoid damaging the package. Protect them from sunshine and rain. Do not transport them together with poisonous or harmful goods. This product is a non-dangerous product and can be transported as a general chemical product. |
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Storage： |
Store in cool, shaded, dry and clean places. Do not store it together with poisonous or harmful goods in order to avoid pollution. The limit of retained quality for two years. |
