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CAS Number: 52-90-4
Molecular formula: C3H7NO2S
Molecular weight: 121.16
EINECS number: 200-158-2

What is L-cysteine?

The sulfhydryl group on L-cysteine is its active group (so glutathione is often abbreviated as G-SH), which is easy to complex with heavy metal salts such as iodoacetic acid, mustard gas (a poisonous gas), lead, mercury, and arsenic. It has an integrated effect. Glutathione (especially the glutathione in liver cells) has a very important physiological role that is integration, such as free radicals, heavy metals, etc., and participates in biotransformation, thereby transforming harmful poisons in the body into non-toxic substances. The harmful substances are excreted from the body.

  Another main physiological role of L-cysteine is as an important antioxidant in the body. It can remove free radicals in pigs, clean and purify the environmental pollution in pigs, thereby improving the health of pigs. Since reduced L-cysteine itself is easily oxidized by certain substances, it can protect the sulfhydryl groups in many proteins and enzymes from being oxidized by harmful substances such as free radicals in the body, so that molecules such as proteins and enzymes can exert their physiology. Function. It can also coordinate with the vitamins in the pigs to protect the healthy level of the pigs, especially the anti-stress ability! And reduce the amount of methionine

Basic Information:

English name: L-Cysteine

English synonyms: (R)-2-Amino-3-mercaptopropanoicacid;3-mercapto-l-alanin;alpha-amino-beta-mercaptopropionicacid;alpha-Amino-beta-thiolpropChemicalbookionicacid;alpha-amino-beta-thiolpropionicacid;Cystein;half -cysteine;L-Cysteine-animalorigin

CAS Number: 52-90-4

Molecular formula: C3H7NO2S

Molecular weight: 121.16

EINECS number: 200-158-2



In terms of feed additives, according to statistics from Moeller Co., Germany, in addition to lysine, glutamic acid and methionine, L-cystine is the largest. Because the solubility of L-cystine is too small (only 0.1lg per 1 liter of water can be dissolved at room temperature), it needs to be prepared into L-cysteine before it can be added to feed for use.


L-cysteine Supplier

Green Agri enjoys long term relationships with our clients because we focus on customer service and providing great products. If you are interested in our products, we are flexible with the customization of orders to suit your specific need and our quick lead time on orders guarantees you’ll have great tasting our products on-time.

We also focus on value-added services. We are available for service questions and information to support your business.

Where to buy L-cysteine?

Just send email to , or submit your requirement in bottom form, we are of service at any time!


Why choose us?

  • Our state-of-the-art manufacturing facilities allow us to produce intermediates of the highest quality and consistency.
  • The enterprise implements standardized, quantitative and standardized management, and has a complete quality assurance system and quality inspection organization. The quality system certification covers the entire production and operation process of the enterprise.
  • Our intermediates are widely used in various industries, including pharmaceuticals, electronics, and food.
  • Our company aims at the advanced level of today’s market, constantly optimizes product structure, and focuses on standardized, scientific and modernized management.
  • Our factory is committed to providing a safe, healthy, and ethical working environment for all our employees.
  • Our business development relies on people who have the spirit of struggle and struggling behavior and continue to create value for the company, and they are the root of the company’s development.
  • Our factory is equipped with the latest testing equipment to ensure that all intermediates meet the required standards.
  • We strive to focus on our main business and insist on innovative, high-quality and cost-effective L-cysteine.
  • Our intermediates are competitively priced without compromising on quality.
  • Our company has a long history of producing L-cysteine, and because we have advanced technical experience and sophisticated equipment, our products are of excellent quality and are welcomed by Chinese and foreign merchants. We welcome customers to cooperate with us and promote the progress of the industry.

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