Best L-Cysteine Powder CAS 52-90-4

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L-Cysteine Powder

Products Description

Name: L-Cysteine Powder

Cas: 52-90-4

Purity: 99%min


Basic Info:







Stock Availability

In stock

Brand Name

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Product Introduction:

The molecular formula of L-cysteine is C3H7NO2S, which is a non-essential amino acid and an isomer of cysteine, which can be converted from methionine.

L-Cysteine Powder is closely related to cystine. Cysteine is relatively unstable and easily becomes cystine, and cystine can also be reduced to form cysteine. Both are sulfur-containing amino acids, which can effectively form the skin and detoxify.

L-cysteine is present in keratin, which is the main protein constituting nails, toenails, skin and hair.

L-Cysteine Powder helps the production of collagen and maintains the elasticity and texture of the skin. Also related to proteins in digestive enzymes, cysteine can provide -SH groups for many important enzymes in the body, including succinate dehydrogenase and lactate dehydrogenase.

Product Nature:

  • Melting point 240°C(dec.)(lit.)
  • Specific optical rotation 8.75º(c=12,2NHCl)
  • Boiling point 293.9±35.0°C(Predicted)
  • Density 1.197 (estimate) FEMA3263|L-CYSTEINE
  • Refractive index 8.8°(C=8,1mol/LHCl)
  • Acidity coefficient (pKa) 1.92 (at25℃)


Product NameL-Cysteine Powder
CAS No.52-90-4
Appearance White crystalline powder
Content99% min
Shelf Life2 years
Packing1kg/bag,25kg/bag or as your requirements

Product function:

  1. In cosmetics: L-cysteine ​​powder is used in the production of perming agents, sunscreens, perfumes, hair restorers, etc. Using cysteine ​​instead of thioglycolic acid, this kind of high-grade hot and cold hot is easy to burn and easy to maintain. ,L-cysteine ​​powder, soft texture, not messy, and other benefits. It can also be matched with sunscreen and hair growth essence.
  2. In medicine: L-cysteine ​​powder is mainly used for liver medicine, detoxification, expectorant and other medicines. Cysteine ​​and its derivatives can be used as expectorants, especially suitable for liver toxin detoxification, antipyretic and analgesic, ulcer treatment, fatigue recovery, infusion and synthetic amino acid preparations. Treat bronchitis and resolve phlegm.
  3. In food: bread fermentation promoter, preservative. L-cysteine ​​powder is used as a fermentation aid, as an antioxidant and stabilizer in milk powder and fruit juice, and as a nutritional additive in pet food.
  4. L-cysteine ​​powder can be used as a raw material for the production of cysteine ​​derivatives such as N-acetyl-L- and carboxymethylcysteine.
  5. Promote the formation of gluten and prevent aging. L-cysteine ​​powder is used in natural juice to prevent VC from oxidation and browning. It has detoxification effect on acrylonitrile and aromatic acidosis. Prevent radiation damage.

The physiological function of L-cysteine:

  1. L-Cysteine Powder has a synergistic effect on organisms, so it has a wide range of poisons: formaldehyde, acetaldehyde, chloroform, carbon tetrachloride, lead, cadmium, methylmercury chloride, lipid peroxide, polychlorinated biphenyls, Tetrodotoxin, alcohol. Experiments have proved that it has an effective detoxification effect.

  2. ffectively prevent and treat radiation injuries.

  3. L-Cysteine Powder is very important in maintaining the activity of thiolase and the production of skin protein keratin. Supplement astragalus to maintain the normal metabolism of the skin and regulate the basal melanin produced by the pigment cells in the lowermost layer of the skin. skin. epidermis. Very ideal. Natural whitening cosmetics.

  4. Whenever inflammation or allergies reduce cholinease and other thiolase, supplementing L-Cysteine Powder can maintain thiolase activity and improve skin symptoms such as inflammation and allergies.

  5. L-cysteine powder has the effect of dissolving dead skin cells, so it is also effective for skin diseases with thick dead skin cells.

  6. L-cysteine powder has the ability to prevent biological aging.


  1. Weast, Robert C., ed. (1981). CRC Handbook of Chemistry and Physics (62nd ed.). Boca Raton, FL: CRC Press. p. C-259. ISBN 0-8493-0462-8.
  2. Wikipedia


Pre-Sales Service

* Timely reply and 24 hours online, the professional team will provide you with the most favorable prices and high-quality products.

* The sample supports testing and inspection.

* Each batch of products will be tested to ensure that its quality meets user needs.

*Packaging can also be made according to customer requirements.

*Any inquiries will be answered by our relevant personnel within 24 hours.

*We will provide you with commercial invoice, packing list, packing list, COA, health certificate and certificate of origin if you need it. If your market has other special requirements, please let us know.


After-Sales Service

*We will monitor the logistics information in real time and will share the information with you.

* You can consult us at any time if you have any questions about the product, and we will answer you in time.

*If you have any questions about the product, you can report it to us, we will deal with it in time for you, and the product can be returned.


1. ≤50kg, we recommend express delivery, usually called DDU service;

2. ≤500kg, air transportation is generally recommended, usually called FOB, CFR or CIF service;

3.>500kg, sea freight is generally recommended, usually called FOB, CFR or CIF service;

4. For high-value products, please choose air and express to ensure the safety of the products.


Do you accept sample order?

We will make samples before mass production. After the samples are approved by the department and users, we will start mass production. During the production process, we will carry out 100% inspection, and then carry out random inspection before packaging.

How to confirm whether the product quality meets our needs before placing an order?

You can consult us to get free samples of some products, you only need to pay the freight or arrange express delivery to us and get the samples. You can send us the product specifications and requirements you need, and we will manufacture products according to your requirements.

What’s your MOQ?

Our MOQ is 1kg. But usually we can also accept a smaller quantity, such as 100g, if you need it, provided that the sample fee is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.

Learn more about us

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Packaging and shipping

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L-Cysteine Powder