Company Profile
(WA:+85247417129)
Shandong Yixin Trading Co., Ltd. is a manufacturer specializing in the research, development, production, sales and service of tanning products, such as tanning sprays, tanning drops, cosmetic peptides, and polypeptides. We always regard the value of our customers as our top priority. We focus on high quality, competitive prices, flexible order quantities, and timely delivery. Our products are mainly exported to customers in European countries, the United States, and Australia. Our products are widely recognized and trusted by users. We also welcome OEM and ODM orders. Being in cooperation with all brands is a great honor and privilege, regardless of whether the brand is a start-up enterprise. We look forward to your every visit. We welcome both new and old customers to contact us to establish future business relationships and achieve mutual success together! Our multilingual team is proficient in international trade regulations and provides end-to-end services ranging from market research, product procurement, quality control, customs clearance to logistics management, ensuring safe and efficient transactions. Customer-centricity and compliance are our cornerstones. We prioritize product quality, timely delivery, and risk mitigation. Through professionalism and accountability, we build trust and become the most reliable global trading partners. We elevate "Made in China" to the world stage and redefine cross-border commerce with simplicity and intelligence.
Product Information
| Product name | polypeptide |
| specification | 99% |
| appearance | White powder |
| Grade | Research grade |
| Storage condition | Store in a cool, dry place away from bright light and high temperature. |
| place of origin | China |
Function Description
Small Molecular Weight & High Activity:
Compared with proteins, peptides have smaller molecular weights and do not require complex digestion. They can directly exert biological activities .
Stable Structure & Easy Storage: The short-chain structure makes peptides resistant to denaturation. Combined with lyophilized powder technology and sealed packaging, they can maintain activity for a long time.
Safe & Low Burden: Naturally present in the human body, animals, and plants. Our products undergo heavy metal, endotoxin, and microbial testing, with harmful impurities well below international limits, ensuring safe use.
Features:
High activity and stability: Freeze-drying process locks biological activity, with a shelf life of up to 2 years under normal temperature and sealed storage, not easy to inactivate during cross-border transportation.
Benefits:
With ready-to-use, stable-performance polypeptide, clients can skip complex hydrolysis and purification processes.
All products come with complete quality certification documents and comply with international regulations (e.g., FDA, EU 10/2011), meeting market access requirements in major global regions such as Europe, America, and Southeast Asia.reducing import/export compliance risks and facilitating smooth market access.
Purity Test (HPLC Method)：Adopts internationally recognized High Performance Liquid Chromatography technology to accurately determine product purity. All series have purity exceeding 99.0%, far higher than regular industry standards, ensuring undiminished peptide activity;
Safety Impurity Test：Targeted screening for toxic heavy metals such as lead, cadmium and arsenic, with test results ＜0.1ppm, meeting international safety limits; simultaneous endotoxin test (＜0.5 EU/mL) and microbial test to eliminate harmful contamination for safer use;
Component Content Test：Professional technology accurately verifies active ingredient content, which is highly consistent with the labeled value, avoiding concentration deviations affecting usage effects;
Structural Integrity Test：Verifies that peptide molecular structure is free of breakage and isomerization, ensuring stable activity and consistent results in every use.
Batch-Specific Traceability：Each batch is equipped with a unique COA report, including exclusive batch number, test date, and laboratory information, fully consistent with product packaging labels for traceable and controllable quality;
Transparent Data with No Concealment：The report clearly records the method, instrument model, specific value, and qualification standard for each test, such as "Purity 99.58%±0.18% (HPLC-UV/VIS Method)", with detailed and easy-to-understand data;
Laboratory Compliance Certification：Tests are conducted by qualified third-party laboratories, and the report meets international general standards, supporting cross-verification by third-party institutions, rejecting "self-claimed quality".
Bacteriostatic Water Dilution Guide
1.Wipe the rubber stoppers of both the peptide vial and bacteriostatic water vial with alcohol swabs, and let stand for 10 seconds to allow alcohol to evaporate;
2.Use a sterile syringe to draw the corresponding volume of bacteriostatic water, e.g., 2.5ml for 10mg Series A peptide;
3.Slowly pour the sterile water into the peptide solution bottle to prevent the formation of foam or structural damage due to direct impact on the powder；
4.Gently rotate or invert the vial to mix (do not shake vigorously to prevent peptide denaturation), and let stand for 15-30 minutes until the powder is completely dissolved;
5.Label the vial with the dilution date after dissolution, and immediately store it in a refrigerator at 2-8℃.
Customer feedback
Why choose us
At our company, we are dedicated to providing high-quality products and excellent customer service to our B2B customers. Here are some of the reasons why customers choose us:
Reliable Supply Chain & Competitive Pricing: With years of industry experience, we have established a stable and efficient global supply chain, enabling bulk production and timely delivery.
Continuous Innovation & Value Addition: We invest heavily in R&D to keep pace with market trends and technological advancements. By collaborating with top research institutions, we continuously upgrade product formulas and develop new applications, providing you with cutting-edge products that meet evolving consumer demands. Choosing us means gaining a partner dedicated to growing with your business.
We’ve streamlined the entire supply chain to prioritize speed—orders are processed promptly upon confirmation.
Payment Details
We accept various payment methods, including Bitcoin, USDT, Alipay, credit card transfer, Wiseand PayPal.
FAQ
1. Q:Does offer free samples?
A:We fully support free samples! Since some customers have just met us, they don't trust me and my products very much. It doesn't matter. We support 1-2 free samples for you to test!
2.Q: What's your MOQ?
A: MOQ 1 box
3. Q: What is the way you ship?
A: Express: FedEx, UPS, EMS, DHL, USPS, etc Our way of shipping the products is universal and secure. The company name and other contents related to pharmacy are not written on the package slips. The way of packing is regularly changed for a secure delivery.
4. Q: What is about the delivery time?
A: The goods of small quantity will be sent out in 1-2 working days.
5.Q: Is there a discount?
A: Yes, for larger quantity, we always support with better price. The more you order,the cheaper.
6. Q: Why I can not find the product I require in this shop?
A: You can contact with us since we, supply comprehensive and series chemical intermediates and some other scientific & healthy materials, we didn't upload all our list on this site.
7. Q: Do you ensure your packing , what about customs, what happens if the package is retained?
A:We concern a lot about our safety system, we pack the orders as secure as possible. If a package is seized at customs, reships of seized orders will be done provided you have a copy of the letter to show us. If you receive a seizure letter, please contact us immediately with a scanned copy of the seizure letter, and also a new address to have your order reshipped to.
