Top quality l-tyrosine powder with best price 60-18-4
1-1000 Kilogram
$30.00
≥ 1001 Kilogram
$20.00
- Item No. TOPMOQ 1 Kilogram
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If over 500pcs, mass production will start until pre-production sample has been approved.
Est. 7 days production
Product Description
Name | L-Tyrosine |
CAS | 60-18-4 |
EINECS | 200-460-4 |
MF | C9H11NO3 |
MW | 181.19 |
MP | >300 °C (dec.)(lit.) |
alpha | -11.65 º (c=5,DIL HCL/H2O 50/50) |
density | 1.34 |
Storage temp | Store at RT |
Assay | 99% Min. |
Appearance | White crystalline powder |
Usage | Amino Acids |
Certification of Analysis
Tests | Limits |
Description | White crystals or crystalline powder |
Identification | Concordant with the reference spectrum |
Assay | 98.5~101.5% |
Specific Rotation | -9.8℃~-11.2° |
Chloride(Cl) | ≤0.04% |
Sulfate(SO4) | ≤0.04% |
Heavy metals(Pb) | ≤15ppm |
Iron(Fe) | ≤30ppm |
Loss on drying | ≤0.3% |
Residue on ignition | ≤0.4% |
Chromatographic purity | Individual impurity ≤0.5% Total impurities ≤2.0% |
Function&Application
Aside from being a proteinogenic amino acid, tyrosine has a special role by virtue of the phenol functionality. It occurs in proteins that are part of signal transduction processes. It functions as a receiver of phosphate groups that are transferred by way of protein kinases. Phosphorylation of the hydroxyl group can change the activity of the target protein, or may form part of a signaling cascade via SH2 domain binding.
A tyrosine residue also plays an important role in photosynthesis. In chloroplasts (photosystem II), it acts as an electron donor in the reduction of oxidized chlorophyll. In this process, it loses the hydrogen atom of its phenolic OH-group. This radical is subsequently reduced in the photosystem II by the four core manganese clusters.
Qingdao Sigma chemical Co., Ltd is is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.
The aim of Qingdao Sigma chemical Co., Ltd is a quality policy that "Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.


Answer: Yes, we are factory founded on 2002.
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Q3:Which kind of payment terms do you accept?
For small order,you can pay by T/T,Western Union or Paypal,nomal order by T/T to our company account
Q4:Can you give me a discount price?
Surely,It depend on your qty
Q5:How can i get a sample?
free samples is available,but freight charges will be at your account and the charges will be return to you or deduct from your order in the future.
Q6: How to confirm the Product Quality before placing orders?
A:You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.
Q7:How do you treat quality complaint?
A:First of all, our quality control will reduce the quality problem to near zero. If there is a real quality problem caused by us, we will send you free goods for replacement or refund your loss.
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