| Product name | L-Tryptophan |
| CAS NO. | 73-22-3 |
| Other names | L-Tryptophan, Animal-Free |
| Molecular weight | 204.23 |
| Molecular formula | C11H12N2O2 |
| Purity | 99% |
| Appearance | Powder |
| Product Name: | L-tryptophan |
| Internal Code: | 000-00769 |
| CAS number | 73-22-3 |
| Molecular formula | C11H12N2O2 |
| ANALYSIS ITEMS | SPECIFICATION | TEST METHOD |
| Appearance | White to yellowish White crystals or crystalline powder |
|
| Identification | Infrared absorption |
|
| Specific rotation[a]D20° | -29.4°~-32.8° |
|
| Loss on drying | ≤0.30% |
|
| Residue on ignition | ≤0.10% |
|
| Sulfate(SO4) | ≤0.030% |
|
| Chloride | ≤0.05% |
|
| Iron(Fe) | ≤30ppm |
|
| Heavy metals(Pb) | ≤15ppm |
|
| Assay | 98.5~101.5% |
|
| Organic volatile impurities | As per USP32 |
|
| PH | 5.5-7.0 |
|
| Packing | Pack in paper-drums and two plastic-bags inside N.W. 25 kgs I.D.35xH51cm. |
| Storage | Store in a well-closed container away from moisture, light, oxygen. |
| Shelf Life | 24 months under the conditions above and in its original packaging |
Application
L-tryptophan is a neutral aromatic amino acid containing indolyl, white or slightly yellow leaf shape crystal or powder, solubility in water 1.14 g(25°C), soluble in dilute acid or dilute base, stable in lye, decomposition in strong acid. Slightly soluble in ethanol, insoluble in chloroform, ether.
Company Profile
Hebei Zhuanglai Chemical Trading Co.,Ltd. is a foreign trading company, specializing in developing and producing Chemical raw materials, pharmaceutical intermediates.It has its own factory, which procures itself a competitive edge in market.
For many years, our company has won many clients' support and trust because it always strives to make high-quality merchandise with favorable price. It commits itself to satisfy every clients, in return, our customer show great confidence and respect for our company. In spite of so many loyal customers won these years, Hegui keeps modest all the time and strives to better itself from every aspect.
We are looking forward to cooperating with you and having a win-win relationship with you. Please rest assured that we will satisfy you. Just feel free to contact me.
Packing & Shipping
FAQ
Q1. What is your delivery term and delivery period?
We accept FOB, CIF, etc. You can choose the one which is the most convenient or cost effective for you. Competitive price with ready stocks; by Air within 7days, by sea within 14 days shipping after .
Q2. What's your main markets?
South&North America, Europe, Asia, Africa etc. Top customers among more than 80 countries; 30 years history; One-stop supplier.
Q3. What is the payment term?
Normally we advise customers use Trade Assurance(is a free payment protection service for buyers is offered by Alibaba group), and we also receive T/T, Western Union or L/C.
Q4. Will you supply samples for test the quality?
We'd like to offer our customers samples for the quality evaluation for most products to develop business.
China
