L-Cysteine Powder

L-Cysteine Powder - Premium Quality Amino Acid Supplement from GMP-Certified Manufacturer

Xi'an Jiayuan Bio-tech Co., Ltd., a leading manufacturer since 2002, specializes in producing high-purity L-Cysteine Powder with a nitrogen content of ≥99%. Our product is based on superior fermentation technology and is Halal, Kosher and Vegan friendly. We have two GMP-certified manufacturing lines, ISO9001 accreditation, and over 20 years of industry experience to provide consistent quality to worldwide markets. Our plant is situated in Xi'an Hi-Tech Industrial Industrial Development Zone, with a registered capital of RMB 30 million and 30 skilled technical people which guarantee outstanding product standards.

What Is L-Cysteine Powder?

It produces a sulfur-containing semi-essential amino acid. R-2-Aminopropionic acid-3-thiol CAS Number 52-90-4 The presence of a reactive free thiol (-SH) group makes the molecule useful in several areas.

We provide a white crystalline powder highly soluble in water (280 g/L at 25°C). Modern manufacture uses bacterial fermentation with sources of glucose . It is thus ethically supplied and non-animal-derived .

This amino acid is a very important reducing agent in biochemistry. It cuts the disulphide bonds in the protein structures and is the rate-limiting precursor for glutathione production – your master antioxidant mechanism.

COA

product Name	L-Cysteine Powder
Ref standard	According with the enterprise standard
Items	Standard		Results
Appearance	White crystals powder		Conforms
Specific Rotation	+8.3-+9.5		+8.8
Nitrogen content	≥99.0%		99.6%
Chloride(Cl)	≤0.1%		＜0.05%
Ammonium(NH4)	≤0.02%		＜0.02%
Sulfate(SO4)	≤0.03%		＜0.03%
Iron(Fe)	≤10PPm		＜10PPm
Heavy metals(Pb)	≤10PPm		＜10PPm
Arsenic(As2o3)	≤1PPm		＜1PPm
Loss on drying	≤0.5%		0.11%
Residue on ignition	≤0.10%		0.05%
PH	4.5-5.5		4.8
Assay	98%.0-101.0%		99.4%
Conclusion	The product conforms to the enterprise standard

Functions

L-Cysteine has several technical advantages in formulations:

Antioxidant Support: It is a precursor for glutathione formation, helping to protect cells from oxidative stress and supporting liver detoxification mechanisms.

Protein Structure Maintenance: The thiol group is involved in the creation of disulphide bonds, which are crucial to the stabilisation of protein structures and enzyme function.

Reducing Agent Properties: Effectively dissolves existing disulphide bonds, leading to structural changes in food processing and medicinal applications.

Mucolytic Activity: It breaks down protein cross-links to assist break down mucus in respiratory diseases.

Application Areas

Food Industry: Acts as a dough conditioner to reduce the mixing time and to remove excessive gluten elasticity in high speed baking manufacturing lines.

Flavour Manufacturing: Acts as a precursor for the Maillard process, creating realistic savoury characteristics in plant-based meat replacements and seasoning formulations.

Pharmaceutical Industry: Intermediate for the production of N-Acetyl L-Cysteine (NAC) and used in respiratory health formulations.

Nutraceutical Supplements: Offers glutathione precursor support for immune health, detox programs and sports recovery products.

Cosmetic Uses: Used in hair and skin care preparations for its keratin-building abilities.

Certificates

Xi'an Jiayuan Bio-tech holds comprehensive certifications:

• FSSC22000 Food Safety System Certification
• ISO9001 Quality Management System
• HALAL Certification
• KOSHER Certification
• HACCP Food Safety Management
• SGS Third-Party Verification

Our facility achieved High-tech Enterprise status in Shaanxi Province (2013) and Private Science and Technology Enterprise recognition for L-Cysteine Powder.

Quality Control

Our quality assurance system ensures every batch meets international standards:

Parameter	Specification
CAS Number	52-90-4
Appearance	White crystal powder
Nitrogen Content	≥99%
Solubility	280 g/L (25°C in water)
Particle Size	40-80 mesh
Heavy Metals	≤10 ppm
Microbiological Standards	USP/EP compliant

We operate professional quality teams with advanced laboratory facilities. Every production stage undergoes strict monitoring from raw material selection through final inspection.

Payment & Shipment

Payment terms : TT , DP , Paypal , Visa , DA , LC , MasterCard , Escrow is available to meet your financial needs .

Logistics Network: We cooperate with FedEx, DHL, EMS, UPS, TNT, international airlines and shipping firms to provide dependable worldwide delivery.

Customs Support: For customers without import expertise, we offer customs clearance support in European and United States areas and transport items straight to your location.

Packaging & Transportation

Standard packaging utilizes moisture-barrier materials to prevent oxidation of the thiol group. We offer flexible packaging options based on your order volume.

Our warehouse maintains stock availability for immediate shipment. Multiple products can be consolidated in single shipments, reducing your logistics costs and customs clearance expenses.

Specialized packaging controls maintain product stability under room temperature conditions throughout the supply chain.

After-sales Service

Your satisfaction drives our commitment. We provide 24/7 technical support addressing formulation questions, application guidance, and troubleshooting.

Free samples are available for quality evaluation before bulk orders. Our technical personnel respond promptly to ensure your production requirements are met.

We maintain ongoing communication throughout the order lifecycle, from inquiry through delivery confirmation.

Exhibitions

We are an industry veteran since 2002 and participate frequently in international trade events to present our innovations and build a network of worldwide partners. Come talk about unique solutions & upcoming applications at our stand.

Why Choose Us

Direct Manufacturer Advantage Factory-direct pricing gives you better profit margins by eliminating the intermediary expense.

Scalable Manufacturing: Two GMP manufacturing lines are available to serve requests from small batch to big scale needs.

Technical Expertise: 30 specialised technical experts with more than 20 years of expertise in amino acid manufacturing.

Quality Consistency: Built-in quality control from procurement to final inspection provides batch-to-batch stability.

Flexible MOQ: Buy more items with less quantity, simplify your inventory management.

ODM/OEM Services. Tailored formulations and packaging to meet your brand standards.

Stock Availability Immediate fulfilment from warehouse stock speeds up your time-to-market.

FAQ

Q: L-Cysteine vs. L-Cystine: What's the difference?

A: L-Cysteine has a free thiol (-SH) group, whereas L-Cystine is two cysteines connected by a disulphide bond. They use multiple transporters to get into cells . So that utilisation may be specifically controlled . L-Cysteine is a functional precursor in the biosynthesis of glutathione.

Q: Is your L-Cysteine appropriate for vegetarian/vegan product?

A: Yes. We make it using bacteria fermentation and glucose sources. 100% Halal, Kosher and Vegan and contains no animal derived products.

Q：What particle size do you offer?

A：Our standard specification ranges from 40 to 80 mesh, ensuring optimal blend uniformity in high-speed encapsulation and mixing operations.

Q：Can you provide technical support for formulation development?

A：Absolutely. Our team of 30 technical professionals offers application guidance, stability recommendations, and formulation optimization support.

Q：What is your minimum order quantity?

A：We accommodate flexible order quantities. Contact us to discuss your specific requirements and consolidation opportunities.

Contact Us

Ready to enhance your formulations with premium L-Cysteine Powder? Contact our technical team at sales@jayuanbio.com and sales1@jayuanbio.com  for samples, quotations, and customized solutions tailored to your production needs.