L Cystine Powder

Premium L Cystine Powder Manufacturer & Supplier - Shaanxi Hongda Phytochemistry

Shaanxi Hongda Phytochemistry is a major manufacturer and supplier of high grade L Cystine Powder, specialising in the development of high quality amino acid products for the worldwide nutrition and pharmaceutical industries. With more than 20 years of experience since 2001, we provide you with pharmaceutical grade goods according to the highest international standards. Our contemporary 20,000-square-meter facility has 100,000-level purification workshops and state-of-the-art extraction equipment, providing consistent purity and stability for every batch. We are distinguished by our fully integrated supply chain from raw material cultivation to completed product supported with internationally recognised Certifications including HALAL, KOSHER, cGMP, FSSC22000 and ISO22000. Our vertical integration enables us to provide you with competitive prices without sacrificing quality but providing solutions customised to your formulation requirements.

Product Introduction

The result is a distinct crystalline dimeric form of a sulfur-containing amino acid , cysteine , with a unique disulphide bond structure . This pharmaceutical quality powder is a vital building ingredient for the synthesis of protein, development of keratin and creation of antioxidants in biological systems. It addresses important formulation difficulties in the cosmetic and nutritional supplement industries, including hair and skin health optimisation, collagen synthesis support, and cellular detoxification pathways. Our premium product gives formulators excellent solubility properties and bioavailability and consistent therapeutic performance in a wide variety of product applications.

Third Test Report

Authenticity Verification: All batches are tested by SGS and Eurofins laboratories for molecular identification verification by HPLC and mass spectrometry with zero adulteration with lower cost analogues.

Pesticide Residue Analysis: Comprehensive multi-residue screening covering 500+ pesticides, with all results consistently below EU regulation limits (<0.01ppm), making our product suitable for organic formulation requirements.

Heavy Metal Contamination: Independent verification confirms Lead (Pb) <0.5ppm, Arsenic (As) <0.5ppm, Cadmium (Cd) <0.5ppm, and Mercury (Hg) <0.1ppm, meeting the strictest pharmaceutical standards.

L Cystine Powder Specification

L Cystine Powder Advantages

Pharmaceutical-Grade Purity: Our innovative crystallisation technique consistently yields 99%+ purity with superior optical clarity and no discolouration concerns that negatively impact product aesthetics in clear capsule formulations.

Exceptional Stability Profile: Our product is stable under accelerated stability testing settings (40°C/75% RH for 6 months) when conventional grades are prone to oxidation, greatly extending the shelf-life of your goods.

Optimised Particle Distribution: Controlled granulation of 80-120 mesh for uniform mixing in multi-ingredient formulations and elimination of segregation difficulties during high-speed tablet compression procedures.

Low Moisture Content: Strict drying procedures ensure moisture stays under 0.5% reducing hygroscopic clumping and microbiological growth during warehousing and transit.​​​​​​​

L Cystine Powder Application

Hair & Skin Care Supplements: Our powder is a major sulfur-rich amino acid ingredient used in many beauty-from-within formulas to support keratin synthesis and offer the amino acid base to strengthen hair follicles and improve skin suppleness.

Clinical Nutrition Therapy: Included in medical nutrition products for patients with cystinuria or metabolic disorders to provide therapeutic doses for kidney stone prevention and regulation of protein metabolism.

Sports Recovery Formulations: Added to post-workout supplements with branched chain amino acids, it speeds up tissue repair and promotes the production of glutathione for the management of oxidative stress in high performance athletes.

Production Process

Step 1 - Raw Material Selection: We purchase premium-grade L-cysteine from our approved supplier partners and perform inbound inspection for identity and purity. Result: Only materials of purity above 98.5 % are used in manufacture.

Step 2 - Oxidative Dimerisation: The selected L-cysteine is oxidised under controlled conditions in pharmaceutical-grade reactors at specific pH and temperature. Result: Formation of disulphide linkages gives L-cystine crystals of great purity.

Step 3 - Crystallisation Purification: The reaction mixture is purified by multi-step crystallisation using regulated cooling rates and solvent systems. Result: Remove trace contaminants, >99% purity

Step 4. Micronization Processing – Crystals are purified and processed in jet milling equipment with particle size monitoring. Result: Uniform 80-120 mesh distribution, optimised for formula applications.

Step 5 - Quality Assurance: Every batch is rigorously tested for HPLC assay, heavy metals screen and microbiological examination. Outcome: Complete compliance documents created for regulatory filing.

Step 6 - Aseptic Packaging: The completed powder is packed in our 100,000 level clean room, in fibre drums with double-layer PE bags. Result: Product integrity maintained across worldwide shipping.

Why Choose Us?

Shaanxi Hongda is an integrated factory, quality control from farm to completed products. Choose Shaanxi Hongda. Our three dedicated planting bases for traceable raw material procurement, certified laboratory with HPLC, GC and atomic absorption spectrophotometry for strict quality control. We always strive to develop and satisfy the increasing needs of the industry with over 150 competent technicians and 20+ experienced R&D experts from top institutions. We are certified cGMP, FSSC22000, BRC and ORGANIC (EU/NOP) so you can be sure we meet international quality standards. With our 3,000 sq.m. warehouse with various storage zones, you will get fast order fulfilment and on-time delivery. Most significantly, our customer-centric strategy means dedicated technical assistance, low pricing for bulk orders and flexible customisation options that fit well with your business objectives.

OEM / ODM Support

Custom Formulation Development: Collaborate with our team of 20+ R&D professionals to create proprietary amino acid blends, integrating L Cystine Powder with complementing substances appropriate to your market positioning.

Flexible Packaging Solutions: We have bulk drums, retail-ready pouches, and custom-branded containers. With MOQs as little as 500kg, we offer full packaging services for emerging businesses.

Regulatory Documentation Help: Our entire technical dossiers include specifications, stability studies and allergen statements that will make it easier for you to register your product in North America, Europe and the Asia-Pacific markets.

FAQ

Q: What is the minimum order quantity for the product?

A: Our usual MOQ is 25kg (one drum) but we can give smaller samples (100-500g) for initial testing and formulation development.

Q: How do you maintain the product stability for overseas shipment?

A: We ship in double-layer PE bags with desiccant packets within fibre drums. All shipments are equipped with temperature monitoring equipment for sensitive destinations.

Q: Do you have an organic certified product?

A: Yes we are both ORGANIC (EU) and ORGANIC (NOP) certified and we can offer organic compliant stuff with proper documentation.

Q: What is the typical shelf life?

A: Shelf life is 24 months from manufacturing date in original packaging in cool, dry conditions (<25°C, <60% humidity).

Contact Us

Ready to elevate your product formulations with premium L Cystine Powder?

Email: duke@hongdaherb.com