2-amino-3-mercaptopropionic acid(cysteine) cas 3374-22-9

Chemical Name: 2-Amino-3-mercaptopropionic acid(Cysteine)
CAS No: 3374-22-9
Molecular Formula: C3H7NO2S
Molecular weight: 121.16
Property:2-Amino-3-mercaptopropionic acid(Cysteine) appears White to off white crystalline powder

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2-Amino-3-mercaptopropionic Acid (Cysteine) CAS 3374-22-9: Comprehensive User Guide

1. Product Overview & Specifications

2-Amino-3-mercaptopropionic Acid (Cysteine) (CAS 3374-22-9) is a sulfur-containing amino acid with the molecular formula C3H7NO2S. It is widely used in pharmaceuticals, food additives, and cosmetic formulations due to its antioxidant properties and role in biochemical processes.

Key Specifications

Parameter Details
CAS Number 3374-22-9
Molecular Formula C3H7NO2S
Molecular Weight 121.16 g/mol
Appearance White crystalline powder
Purity ≥98.5%
Storage 2-8°C, dry, airtight container

Comparative Analysis

Feature Cysteine (CAS 3374-22-9) Cystine Methionine
Sulfur Content High (thiol group) Disulfide bond Single sulfur atom
Solubility Water-soluble Low solubility Moderate
Antioxidant Activity Strong Weak Moderate

2. Applications & Uses

Pharmaceutical Industry

  • Antioxidant Therapy: Neutralizes free radicals in metabolic disorders.
  • Drug Stabilizer: Prevents oxidation in injectable formulations.
  • Detoxification: Binds to heavy metals (e.g., mercury, lead).

Food & Beverage

  • Dough Conditioner: Enhances elasticity in baked goods.
  • Flavor Enhancer: Used in meat and savory products.
  • Shelf-life Extender: Reduces lipid oxidation in oils.

Cosmetics

  • Hair Care: Strengthens keratin bonds in hair treatments.
  • Skin Protection: Reduces UV-induced oxidative stress.

3. Usage Guidelines

Pharmaceutical Formulations

  1. Dissolve in sterile water at 40-50°C.
  2. Maintain pH 6.5-7.5 for optimal stability.
  3. Use nitrogen blanket to prevent oxidation.

Food Additive Protocols

  1. Add 0.1-0.5% by weight during mixing.
  2. Combine with ascorbic acid for synergistic effects.

4. Case Studies

Case 1: Injectable Drug Stabilization

A European pharma company reduced particulate formation by 72% using 0.3% cysteine in antibiotic solutions.

Case 2: Gluten-Free Bread Production

Addition of 0.2% cysteine improved dough elasticity by 40% in gluten-free formulations.

5. Client Success Stories

Client A: Nutraceutical Manufacturer

Challenge: Oxidation of omega-3 capsules
Solution: 0.1% cysteine coating
Result: 18-month stability achieved

Client B: Cosmetic Brand

Challenge: Hair breakage in keratin treatments
Solution: 2% cysteine in conditioning phase
Result: 35% reduction in breakage

6. Contact for Technical Inquiries

Email: info@vivalr.com
Phone: (86) 15866781826

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