L-Cystine 99% High Purity | Pharma / Feed / Cosmetic Grade Bulk Supply

Product Introduction

L-Cystine (CAS: 56-89-3) is a vital sulfur-containing amino acid naturally found in human and animal keratin, such as hair and nails. It is widely used in pharmaceutical manufacturing, feed fortification, cosmetic formulation, biochemical research and food industry.

The product appears as white hexagonal plate crystals or crystalline powder, odorless and tasteless. It is soluble in dilute acid and alkaline solutions but practically insoluble in water.

We supply high-purity L-Cystine with stable batch consistency, complete quality control standards and full export documents. COA, MSDS and test reports are available for every batch. We support sample testing, small trial orders and large-scale bulk supply for global manufacturers.

Product Specifications

– Product Name: L-Cystine
– Alternative Names: (R,R)-3,3′-Dithiobis(2-aminopropanoic acid)
– CAS No.: 56-89-3
– EINECS No.: 200-296-3
– Molecular Formula: C₆H₁₂N₂O₄S₂
– Density: 1.677
– Appearance: White hexagonal crystal or crystalline powder
– Solubility: Soluble in dilute acid and alkali, slightly soluble in water
– Available Grades: Pharmaceutical Grade, Feed Grade, Cosmetic Grade, Biochemical Grade
– Package: 25kg fiber drum
– Supply Capacity: In stock, stable bulk export, long-term contract supply

Product Advantages for Global Buyers

✅ Stable pure white crystal appearance with low impurity content and minimum batch difference
✅ Strict control of heavy metals and microorganisms, suitable for industrial mass production
✅ Full quality traceability with official COA and third-party test reports
✅ Complete export documentation supports fast customs clearance
✅ Flexible MOQ: sample support, small trial orders and full container supply

Main Applications

Pharmaceutical Industry

L-Cystine is an essential raw material for compound amino acid injections and pharmaceutical formulations. It supports cell oxidation-reduction function, increases white blood cell activity, and assists in recovery from hair loss, infection, asthma and skin inflammation. It is widely adopted in healthcare and pharma production.

Feed Additive Industry

As an effective nutritional fortifier, L-Cystine promotes animal growth, improves weight gain, protects liver and kidney function, and enhances fur quality. It is commonly used in poultry, livestock and aquaculture feed formulas.

Cosmetic & Personal Care Industry

L-Cystine is a popular functional ingredient for skin and hair care. It helps wound repair, relieves skin sensitivity, improves eczema symptoms and strengthens hair keratin structure.

Biochemical & Food Industry

It is widely used for preparing biological culture media, biochemical experiments and nutritional research. It can also be applied as a food flavor enhancer.

Why Choose Us as Your L-Cystine Supplier

We are a professional manufacturer and exporter of amino acid raw materials. We maintain strict quality inspection on purity, moisture, heavy metals and batch stability.

With sufficient inventory, stable production capacity and standardized export packaging, we provide reliable long-term supply for global pharmaceutical factories, feed enterprises, cosmetic manufacturers and research institutions.

Professional document support, fast delivery and responsive after-sales service make us your trustworthy China supplier.

FAQ

Is L-Cystine water soluble?

L-Cystine is slightly soluble in water, but easily soluble in dilute acid and alkaline solutions, suitable for industrial formula preparation.

Can you provide free samples for testing?

Yes, we support laboratory sample testing and provide corresponding batch COA documents.

What is your regular packaging?

Standard 25kg fiber drum packaging. Custom packaging is acceptable for long-term orders.

Inquiry & Cooperation

Welcome to contact us for the latest wholesale price, sample test, certification documents and long-term bulk supply solutions. We provide professional one-stop foreign trade procurement service for global buyers.