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L-Cysteine base AJI/USP

L-Cysteine base AJI/USP

  • High Light

    l-cysteine supplement


    CAS 52-90-4


    l-cysteine in food

  • Product Name
    L-Cysteine Base
  • CAS NO.
  • Molecular Formula
  • Molecular Weight
  • Place of Origin
  • Brand Name
    Premium Ingredient
  • Certification
    iso, halal, kosher
  • Minimum Order Quantity
  • Packaging Details
    25 kg per Drum
  • Delivery Time
    1-2 weeks
  • Payment Terms
    TT against copy of documents、L/C
  • Supply Ability

L-Cysteine base AJI/USP

L-Cysteine base


Products Description

L-cysteine is as a protein amino acid. One of the main functions of l-cysteine is the promotion of stomach lining health and also the correction of situations where the absorption of essential nutrients from food sources takes place.


What is L-cysteine salt?

L-Lysine is an essential amino acid, meaning that it is not able be synthesized in the body. Its codons are AAA and AAG. L-lysine is the biologically active form of lysine in animals. L-lysine is the precursor for many substances that are important in human nutrition. Alpha ketoglutarate is used to convert L-lysine into acetyl-CoA, which plays an essential role in the citric acid cycle. Allysine is also derived from lysine and is used to synthesize collagen and elastin.

Application of L-cysteine salt
1. Mainly used in cosmetics, biochemical research and other aspects.
2. Used in bread, to promote the formation of gluten and promote fermentation, mold, prevent aging.
3.Used in natural juices to prevent vitamin C from oxidizing and to prevent the juices from turning brown.
4. The product has a detoxification effect, can be used for acrylonitrile poisoning, aromatic acidosis.

5. Cosmetics mainly used for beauty water, perm fluid, sun - proof skin care cream.


Basic Info

Product Name:


Other Name:


CAS No.:


Molecular Formula:


Molecular Weight:


Exact Mass:


EC Number:



Colorless crystals|White crystals












1.6666 g/cm3 @ Temp: 45.00 °C

Melting Point:

240 °C (decomp)

Boiling Point:

293.9ºC at 760 mmHg

Flash Point:


Refractive Index:

8.8 ° (C=8, 1mol/L HCl)

Water Solubility:

H2O: 280 g/L (25 ºC)

Storage Conditions:

Store at RT.

Vapor Pressure:

6.73X10-7 mm Hg at 25 deg C (est)


LD50 orally in Rabbit: 1890 mg/kg

Specific rotation:+6.5 deg at 25 °C/D (5 N HCl); 



Handling and Storage

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.


Conditions for safe storage, including any incompatibilities

Keep container tightly closed in a dry and well-ventilated place. Store under inert gas. Air sensitive. Storage class (TRGS 510): Non Combustible Solids.


Amino Acids
Product name Cas No. Product name Cas No.
D-aspartic acid 1783-96-6 DL-Valine 516-06-3
taurine 107-35-7 DL-Leucine 328-39-2
l-lysine base 56-87-1 DL-Threonine 80-68-2
L-Methionine 63-68-3 DL-Methionine 59-51-8
L-Threonine 72-19-5 DL-Alanine 302-72-7
L-Pyroglutamic acid 98-79-3 Glycine 56-40-6
L-Cystine 56-89-3 L-Glutamine 56-85-9
L-Tyrosine 60-18-4 L-Phenylalanine 63-91-2
L-Leucine 61-90-5 L-Proline 147-85-3
L-Isoleucine 73-32-5 L-Histidine Hcl 5934-29-2
L-Valine 72-18-4 L-Histidine 71-00-1
L-Citrulline 372-75-8 L-Tryptophan 73-22-3
L-Arginine 74-79-3 N-Acetyl-L-Tyrosine 537-55-3
L-Arginine monohydrochloride 1119-34-2 N-Acetyl L-Cysteine 616-91-1
L-Glutamic Acid 56-86-0 Creatine Monohydrate 6020-87-7
L-Cysteine Hcl Mono 7048-04-6 Creatine Anhydrous 57-00-1
L-Cysteine Hcl Anhy 52-89-1 L-Aspartic Acid 56-84-8
L-Cysteine 52-90-4 L-Alanine 56-41-7
D-Leucine 328-38-1 L-Theanine 3081-61-6
L-Lysine monohydrochloride 657-27-2 BCAA(Branched Chain Amino Acids)



Packing & Delivery

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Our Company

L-Cysteine base AJI/USP 1

Premium Ingredient Co., Ltd has been producing and distributing amino acids, vitamins, nutrition and food additives for decades, severing for more than 100 clients in the fields of food, beverage, diet supplements, cosmetic, pharmaceutical and animal feeding, exporting to dozens of countries. We supply these products only from the first class Chinese factories with over 10 years producing experiences.


With more than 10 years working experience, Premium Ingredient Co., Ltd offers not only quality products, but also good service, quick response, delivery in time, share up-to-the minute market information, supply one-stop-shop solutions.


We have established a long-term, extensive and deep cooperation with the source to ensure sufficient supplies, stable prices, and rapid shipment. Our 3rd party documents include ISO9001, ISO14001, HACCP, HALAL, KOSHER, GMP, FAMI-QS.


We expect you sending email or coming for negotiation.



Our Factory

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Our Research

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Our Certifications

L-Cysteine base AJI/USP 6

AJI97 Quality Standard

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Q: How long is your delivery time?

A: Generally it is 1-2 weeks..


Q: Do you provide samples ? is it free or extra ?

A: Yes, we could offer the sample for free charge but do not pay the cost of freight.


Q: What's your MOQ ?

A: For the high value product, our MOQ starts from 25kg.


Q: Is there a discount ?

A: Yes, for larger quantity, we always support with better price.


Q: How to confirm the Product Quality before placing orders ?

A: Our products conforms to the internation standard, such as USP, CP, FCC. We can also send you the samples for test. After you confirmed the samples, we will move to the next step for cooperation.


Q: How to start orders or make payments ?

A: You can send our your Purchase order ( if your company has ), or just send a simple confirmation by email or by Trade Manager, and we will send you Proforma Invoice with our bank details for your confirmation, then you can make payment accordingly.


Q: How do you treat quality complaint ?

A: We tested each batch before delivery and only qualified product will be delivery, in case you find any problem about the quality when you received and tested, send email to us, and enclose the photo of the products and 3rd party test reports, We negotiate to resolve these issues, recall or exchange goods, or compensate.


Q: why we choose you ?

A : We ensure ingredient purity, on-time delivery, process efficiency and the technical documents you require.

(1) quality: meet even exceed what you expect.

(2) prices: competitive

(3) service: one stop shop solution, respond soon, delivery fast, share the market information, share the new application of the product.