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DL-Methionine Description
DL-Methionine is one of the essential amino acids of human body, which is involved in protein synthesis.Since it cannot be produced in the body itself, it must be acquired externally.A lack of methionine can lead to a breakdown in protein synthesis and damage to the body.Excessive oxidation of membrane lipids caused by oxygen free radicals in the body is the cause of many kinds of damage to the body.
The lipid peroxides damage the primary and secondary lysosomal membranes, releasing the hydrolyzed acid phosphatases contained in the lysosomes and causing damage to important organelles such as the cell and mitochondrial membranes, which methionine fights in a variety of ways.
Items | Standards | Results | |
Description | White crystals or crystalline powder | Conforms | |
Identification(IR) | Concordant with the reference spectrum | Conforms | |
Assay | 99.0~100.5% | 99.5% | |
State of solution | Clear & colorless ≥98.0% | Clear & colorless 98.7% | |
Choloride(Cl) | ≤0.02% | <0.02% | |
Ammonium(NH4) | ≤0.02% | <0.02% | |
Iron(Fe) | ≤10ppm | <10ppm | |
Heavy metals(Pb) | ≤10ppm | <10ppm | |
Arsenic (As) | ≤1ppm | <1ppm | |
Other amino acids | Conforms | Conforms | |
Loss on drying | ≤0.30% | 0.13% | |
Residue on ignition | ≤0.1% | 0.07% | |
Conclusion | Passed test according to the Standard of AJI92 | ||
Q1: Do you accept Alibaba Trade Assurance?
Yes, most our products are accepted via Alibaba Trade Assurance.
Q2: Can I have free samples?
Yes, we can supply the free 10-20g sample except high value products, but the shipping cost be paid by you. Generally USD45 for sample fee.
Q3: How do I pay the sample fee?
Paypal,Western Union,T/T or just provide your courier's account number, we prefer FEDEX.
Q4: How do you treat quality complaint?
If quality problem caused by us after Third Party Test, we will send you free goods for replacement or refund your payment.
Q5:What's your MOQ and lead time?
Generally MOQ is 1kg, some low value products, MOQ is 25kg and lead time is within 4-5 workdays upon your payment.
Q6: Which products you can export?
We are mainly exporting herbal extracts, amino acids, vitamins, cosmetics and APIs.
Q7. Which countries did you export?
US,Canada, India, Thailand,Vietnam.Taiwan, Japan, Poland, Spain, France, UK, Germany, Italy, Bulgaria, Greece, Hungary, Australia, Iceland, Qata, Mexico, Brazil,South Korea,Kuweit,
Turkey,Russia,Austria,Nigeria,Guatemala,Sweden,Phhilippines,Iraq, Pakistan, South Africa,Denmark,Kenya
Q8: Which documents you can provide?
Usually, we provide Commercial Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.
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