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Shaanxi Kaishi Biotechnology Co., Ltd
$18
1-199 Others
$15
200-499 Others
$11
≥500 Others
Product Attributes
Model No.: 56-89-3
Product Description
L-Cystine is a sulfur-containing amino acid ingredient formed by two cysteine molecules linked through a disulfide bond. It is widely used in nutritional supplements, beauty nutrition products, and pharmaceutical-related formulations due to its role as a structural amino acid and its suitability for specialized ingredient applications.
As a nutritional ingredient, L-Cystine is commonly supplied as a white crystalline powder with high purity specifications. Buyers evaluate L-Cystine based on amino acid assay, optical purity, solubility characteristics, raw material quality, and suitability for the intended formulation.
L-Cystine is the oxidized dimer form of L-cysteine, consisting of two cysteine molecules connected by a disulfide bond. It is a naturally occurring sulfur-containing amino acid found in proteins, especially those rich in structural sulfur bonds.
Commercial L-Cystine is mainly used as a nutritional ingredient and formulation component. It is valued for its amino acid profile and is commonly incorporated into dietary supplements, protein nutrition products, beauty formulations, and specialized nutritional blends.
| Item | Specification |
|---|---|
| Product Name | L-Cystine Powder |
| Category | Nutritional Ingredients / Amino Acids |
| Active Compound | L-Cystine |
| CAS Number | 56-89-3 |
| Molecular Formula | C6H12N2O4S2 |
| Molecular Weight | 240.30 g/mol |
| Appearance | White crystalline powder |
| Assay Grade | Common grades include 98.0% or higher purity; customized specifications available |
| Test Method | HPLC or amino acid analysis for identification and assay |
| Shelf Life | 24 months under recommended storage conditions |
| Storage | Store in a cool, dry place away from direct sunlight and moisture |
| Packaging | Standard packaging includes 1kg/5kg aluminum foil bags and 25kg fiber drums; customized packaging available |
| Applications | Dietary supplements, amino acid blends, beauty nutrition products, and nutritional formulations |
L-Cystine is used in capsules, tablets, and powdered nutritional supplements. Formulators select specifications according to dosage requirements, ingredient combinations, and product positioning.
L-Cystine is commonly included in beauty nutrition formulations where amino acids and protein-related nutrients are important formulation considerations.
As an amino acid ingredient, L-Cystine can be incorporated into specialized nutritional blends designed around protein and amino acid composition.
For amino acid buyers, the key purchasing factors for L-Cystine include purity level, analytical verification, and compatibility with the final dosage form. Because amino acids are often used as functional formulation components, consistent assay results are important for accurate product development.
| Selection Factor | Buyer Consideration | Application Impact |
|---|---|---|
| Purity Level | Higher purity supports accurate amino acid content calculation | Important for premium supplements and precise formulations |
| Particle Characteristics | Influences mixing performance and processing convenience | Relevant for powder blends, capsules, and tablets |
| Documentation | COA and analytical records support raw material approval | Important for international ingredient procurement |
L-Cystine powder is commonly supplied in sealed aluminum foil bags or fiber drums to protect product quality during storage and transportation. Packaging formats can be customized according to project requirements.
L-Cystine can be incorporated into customized nutritional supplements, amino acid blends, beauty nutrition products, and powdered formulations. OEM support may include formulation assistance, blending, packaging customization, labeling solutions, and technical documentation.
Quality control for L-Cystine focuses on amino acid identity, purity, and product safety. Standard testing may include:
L-Cystine is a valuable sulfur-containing amino acid ingredient used in nutritional supplements, beauty nutrition, and specialized formulations. With standardized purity options, analytical quality control, and flexible supply formats, it supports reliable ingredient sourcing for modern nutrition product development.
Contact us today to request samples, a COA, technical documents, and a wholesale quotation for L-Cystine.
Packaging & Delivery
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