L-Cystine paramete

CAS No.: 56-89-3
Place of Origin: Shandong,China
Grade Standard: Medicine Grade
Purity: 99%min
cas: 56-89-3
Form: powder
Storage: cool
Package: as required
MF: C6H12N2O4S2
Type: Vitamins, Amino Acids and Coenzymes
Usage: Animal Pharmaceuticals
Model Number: 20190318053
Product Name: L-Cystine
Color: white
Shelf life: 2 year
Packing: Drum
Test: HPLC


Item Standard Result
 DEFINITION Cystine contains NLT 98.5% and NMT 101.5% of C6H12N2O4S2, as L-Cystine, calculated on the dried basis.  conforms
 -215°to  -225°  -217.82°
 The principal spot conform  conforms
ASSAY 98.5%-101.5% 99.30%
 IMPURITIES Inorganic Impurities  RESIDUE ON IGNITION  NMT 0.1%  <0.1%
 CHLORIDE  NMT 200ppm  <200ppm
 SULFATE  NMT 200ppm  <200ppm
 IRON  NMT 10ppm  <10ppm
 HEAVY METALS  NMT 10ppm  <10ppm
Organic Impurities  Individual impurities  NMT 0.2%  <0.2%
 Total impurities  NMT 2.0%  <2.0%
Conclusion:complies with USP 36.


1. Medicine is to promote the body's cells on the oxidation and reduction function, increase the white blood cells and to prevent pathogenic bacteria growth, and so on.Mainly used for all kinds of alopecia.Also used in acute infectious diseases such as dysentery, typhoid fever, flu, asthma, neuralgia, eczema, as well as a variety of poisoning disease, etc., and maintain the function of protein conformation.Also used as a food flavoring.

2. Be feed nutrition enhancer, be helpful for animal growth, increase the weight and liver and kidney function, improve the quality of fur.

3. Can make cosmetic additives, can promote wound healing and prevent skin allergy and treatment effect such as eczema.

Product service

1. Certificate Of Analysis (COA)

2. Material Safety Data Sheet (MSDS)

3. Route of synthesis (ROS)

4. Method of Aanlysis (MOA)

5. Nuclear Magnetic Resonance (NMR)

6. Packing pictures and loading video before loading

7. Free Sample

8. Factory audit


Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.

After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.


Q1: Do you accept sample order?
A:  We will make samples before mass production, and after sample approved, we'll begin mass production. Doing 100% inspection during production, then do random inspection before packing.
Q2:  What is our advantage?
A : The series of natural extracted product are all self-developed, produced and tested. Mature production technology, strict cost control, and perfect quality assurance system, ensure the product stability and competitive price.
Q3: What’s your MOQ?
A :  Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.
Q4: Do you supply product report?
A : Yes. We'll give you product analysis report before shipping.
 Q5: Is there a discount?
A :  Different quantity has different discount.
Q6: Can we visit your factory?
A :  Yes. Welcome to visit.
Q7: 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.


L-Cystine should be storaged in sealed containers under room temperature.


1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.


25KG /drum/bag or according to your requirements.

Packing can be conducted according to customers' requirements.

Delivery detail

   [Delivery] 5 working days after payment.

L-Cystine picture

Packaging and shipping

Honor Certificate

Professional team