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Postion:Product Catalog >Biochemical Engineering>Amino Acids and proteins>L-Cysteine Base
L-Cysteine Base
  • L-Cysteine Base
  • L-Cysteine Base
  • L-Cysteine Base
  • L-Cysteine Base
  • L-Cysteine Base

L-Cysteine Base NEW

Price Get Latest Price
Package 1Kg/Bag 25Kg/Bag 100Kg/Bag
Min. Order: 1Kg/Bag
Supply Ability: 20 tons
Update Time: 2026-07-21

Product Details

Product Name: L-Cysteine Base CAS No.: 52-90-4
EC-No.: 200-158-2 Min. Order: 1Kg/Bag
Purity: 98% up / AJI92 / USP Supply Ability: 20 tons
Release date: 2026/07/21

Product Information 



Product name

L-Cysteine Base

CAS No.

52-90-4

Molecular Formula

C3H7NO2S

Molecular Weight

121.16

Quality Standard

99% up by HPLC, AJI97

Appearance

White powder



Usage 

Function of L-Cysteine Base

1. In cosmetics: used in the production of perm essence, sunscreen, perfume, hair nourishing essence, etc. This kind of advanced perm essence and cold perm essence, which replaces thioglycolic acid with cysteine, is easy to perm, easy to maintain hairstyle, soft and not It can also prepare sunscreen and hair growth perfume;

2. In medicine: cysteine is mainly used in liver medicine, antidote, expectorant and other medicines. Cysteine and its derivatives can be used for liver poisoning and detoxification, antipyretic and analgesic, ulcer treatment, fatigue recovery, infusion and comprehensive amino acid preparations, etc., especially for expectorant; treatment of bronchitis and phlegm reduction.

3. In food: bread fermentation accelerator, preservative. Cysteine is used as fermentation aid, antioxidant and stabilizer for milk powder and fruit juice, and nutritional additive for pet food;

4. L-cysteine can be used as the raw material for the production of N-acetyl-L-, carboxymethyl cysteine and other cysteine derivatives.

5. Accelerates the formation of gluten and prevents aging; it can be used in natural fruit juice to prevent the oxidation and browning of VC; it has detoxification effects on acrylonitrile and aromatic acidosis. Prevent radiation damage.


Application of L-Cysteine Base

1) Mainly used in cosmetics 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.



COA of L-Cysteine Base 


ANALYSIS

SPECIFICATION

RESULTS

Appearance

White crystal powder

Complies

Odor

Characteristic

Complies

Tasted

Characteristic

Complies

Assay

99%

99.56%

Sieve Analysis

100% pass 80 mesh

Complies

Loss on Drying

5% Max

1.02%

Sulphated Ash

5% Max

1.3%

Extract Solvent

Ethanol & Water

Complies

Heavy Metal

5ppm Max

0.5 ppm

As

2ppm Max

0.01 ppm

Residual Solvents

0.05% Max.

Negative

Microbiology


Total Plate Count

1000/g Max

235/g

Yeast & Mold

100/g Max

46/g

E.Coli

Negative

Negative

Salmonella

Negative

Negative


Company Information 

Article illustration





Company Profile Introduction

Sinoway Industrial co., ltd. was established in 1987 in Xiamen, China, and now has been a leading group specialized in research, development, custom manufacturing and trading of pharmaceutical intermediates, APIs, health and food supplements, cosmetic raw materials, herbal extracts, polypeptides and prostaglandin derivatives, etc.. We have passed ISO9001:2015. With qualified products, competitive price and excellent service, we have received great reputation of our customers from all over the world, including Southeast Asia, Europe, North America, South America, Middle East and other countries. We have over 20 years good partners in Japan、Korea and Switzerland. Sinoway has a professional R&D team. We have built close cooperative relationships with many research institutes and universities in China. Moreover, Sinoway combines market analysis with technology, providing new business trends to our clients. In addition, we have very close cooperation relationships with many Chinese pharmaceutical factories. These pharmaceutical manufacturers have GMP regulated workshops, advanced production and testing equipments, first-class QC labs and a production team with rich experience. We can supply various Active Pharmaceutical Ingredients and finished products which meet EP/USP/BP standards. Chinese GMP, EU-GMP, COS/CEP certificates with DMF documents are available, and many products have been approved by FDA. We believe that quality and innovation are vital for an enterprise. Adhering to the business philosophy of integrity and win-win cooperation, Sinoway is looking forward to have a bright future with you together.

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