Factory supply 51-48-9 L-Thyroxine/Levothyroxine powder

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Name:  L-Thyroxine
Synonyms： 3,5,3’,5’-tetraiodothyronine;beta-[(3,5-diiodo-4-hydroxyphenoxy)-3,5-diiodophenyl]alanine;l-3,5,3’,5’-tetraiodothyronine;l-t4;o-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-l-tyrosin;β-((3,5-Diiodo-4-hydroxyphenoxy)-3,5-diiodophenyl)alanine;3,5,3',5'-TETRAIODO-L-THYRONINE;3,3',5,5'-TETRAIODO-L-THYRONIN
CAS:  51-48-9
Molecular formula:  C15H11I4NO4
Molecular weight: 776.87
EINECS: 200-101-1

Appearance：  White powder.
Melting point:  235 °C
Boiling point:  
Density:   2.4440 (estimate)
Specific rotation：-5 º (1N NaOH:EtOH 1:2)
The refractive index:  
Storage conditions:  Keep in dark place,Inert atmosphere,2-8°C
Acidity coefficient(pKa):  2.2(at 25℃)
Solubility: Dissolves in 4M ammonium hydroxide in Methanol at 50mg/ml
Chemical properties: It's a white crystal. Mp235-236℃(decomposition), specific rotation [α] 20d-4.4 °(3%, 0.13mol/L sodium hydroxide, 70% ethanol), maximum absorption at 325nm in 0.4mol/L naoh solution, maximum absorption at 295nm in 0.4mol/L HCL solution. This product is soluble in alkali solution, insoluble in water, ethanol and ether.
Brief introduction:   3, 5-diiodine-L-tyrosine was used as the main raw material

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Company Profile

Chengdu YoungShe Chemical Co Ltd is dedicating to be the most professional, efficient,and reliable partner for global customers on cosmetic peptides. You can select more than 200 kinds of cosmetic peptides here.And we are keeping developing new products and continuously marketing them for sale. YoungShe Chem provide a one-stop service on cosmetic peptides.It will save you lots of time,energy and money.You will have very pleasant experience with us.Youngshe Chem,your personal cosmetic peptide consult. Since Dec,2015, YoungShe group has expanded their business to botanical cosmetic active ingredient and related.

Our Advantages

1. Professionalism of production: With more than 20 years of experience in peptide production, to ensure the stability and reliability of each batch of peptide quality.
2. Professionalism of product efficacy: We are familiar with more than 300 kinds of cosmetic peptides that are now available worldwide, thorough research.
3. Professionalism of service: customer satisfaction is our greatest work.
4. Reliability: We always believe that only good reputation and product quality can make a good company.
5. Flexibility: We offer a variety of peptides, liquid, freeze-dried powder etc.
6. Variety products: We offer more than 200 peptides, including dipeptide, tripeptide, tetrapeptide, pentapeptide, hexapeptide, copper peptide, oligopeptide and so on.

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