L-Cysteine Hydrochloride | Food & Pharma & Cosmetic Grade Bulk Supply CAS 52-89-1

Why Global Buyers Choose L-Cysteine Hydrochloride

L-Cysteine Hydrochloride (CAS 52-89-1) is a widely applied sulfur-containing amino acid raw material for industrial manufacturing. Free-base L-Cysteine is chemically active and prone to oxidation, making it unsuitable for long-distance sea transportation and prolonged storage. Comparatively, L-Cysteine Hydrochloride delivers superior chemical stability and becomes the preferred commercial grade for food, pharmaceutical, cosmetic and biochemical laboratory industries.

This product features excellent reducing capacity with powerful antioxidant and anti-browning properties, supporting multiple industrial production chains. For formulators and manufacturers, consistently stable L-Cysteine Hydrochloride helps standardize production processes and reduce losses caused by discoloration and deterioration of finished goods.

As a direct manufacturer, we produce L-Cysteine Hydrochloride via fermentation technology, supplying Food Grade and Pharma Grade specifications. 25kg standard export packages are kept in stock all year round. Complete export documents including COA, HPLC test reports and MSDS are available for every batch. We support sample evaluation, small trial orders and long-term full-container contracts, and our products comply with import standards of multiple countries.

Basic Physicochemical Parameters of L-Cysteine Hydrochloride

Product Name: L-Cysteine Hydrochloride
CAS No.: 52-89-1
Molecular Formula: C₃H₈ClNO₂S
Molecular Weight: 157.62
Appearance: Colorless to white crystalline powder, slight odor, sour taste
Solubility: Soluble in water, ammonia water and acetic acid; slightly soluble in ethanol; insoluble in ether, acetone and benzene
Aqueous Solution pH: 1% solution pH ≈1.7; 0.1% solution pH ≈2.4, acidic solution
Decomposition Temperature: 175℃
Stability: Stable under acidic conditions; easily oxidized to L-Cystine by air in neutral or weakly alkaline environment. Iron and heavy metal ions will accelerate oxidation.

Core Advantages for Purchasers

1. Strong Antioxidant & Color Protection, Lower Production Loss

Powerful reducing property inhibits raw material oxidation and prevents non-enzymatic browning. It protects active ingredients such as Vitamin C and delays discoloration of finished products, cutting waste costs for manufacturers.

2. Superior Storage Stability vs Free L-Cysteine

Less susceptible to oxidation and deterioration. Ideal for ocean shipment and long-term warehousing, greatly lowering the risk of quality degradation during cross-border transportation.

3. Multiple Grades to Meet Diverse Formulation Needs

Food Grade and Pharma Grade available. Strict control over heavy metals and related impurities, meeting compliance requirements for bakery processing, pharmaceutical intermediates, perming cosmetics and biochemical experiments.

4. Stable Supply from Factory, Complete Export Documentation

Standardized fermentation production lines with sufficient inventory. We flexibly support sample testing, small trial orders and large long-term bulk orders. Comprehensive certification documents satisfy customs clearance and internal quality inspection requirements worldwide.

Main Application Fields

Food Industry

Used as food antioxidant additive and dough conditioner for baking. It promotes gluten formation, optimizes dough fermentation and improves the texture of bread and pastries. Meanwhile, it inhibits oxidative browning and protects active nutritional components.

Pharmaceutical Industry

Classical antidote raw material for heavy metal poisoning, radiation damage and toxic hepatitis. It also acts as a key intermediate for pharmaceutical synthesis. It participates in glutathione synthesis inside the human body, protects liver cells and accelerates tissue repair.

Cosmetics & Personal Care Industry

Widely used in perming agents, hair care products, skin care and sunscreen formulations. Its thiol reductive property is applied in hair conditioning, and the antioxidant system alleviates oxidative skin damage.

Biochemical Research & Laboratory

Classic biochemical reducing agent for hemolysin testing, cell culture and protein-related experiments. Popular among biotechnology companies and research laboratories.

Quality Control, Packaging & Storage Conditions

Every batch undergoes sampling inspection before shipment to guarantee consistent indicators.
Standard Export Package: 25kg fiber drum with moisture-proof inner bag.
Storage Suggestion: Keep sealed in cool, dry and ventilated warehouse. Avoid prolonged exposure to air and humid environment. Keep away from heavy metal materials to prevent oxidation.

Frequently Asked Questions

Q1: What is the difference between L-Cysteine and L-Cysteine Hydrochloride? Which one should I buy?

A: Free L-Cysteine has poor stability and oxidizes rapidly. For export shipment, long-term storage and large-scale industrial production, L-Cysteine Hydrochloride is highly recommended thanks to better chemical stability and easier formulation application.

Q2: Can you provide L-Cysteine Hydrochloride samples for formulation testing?

A: Samples are available for laboratory evaluation. Bulk orders can be negotiated after your lab test confirms satisfactory results.

Q3: Are your documents acceptable for overseas import customs clearance?

A: Complete COA, HPLC reports and MSDS can be provided. We can match Food Grade or Pharma Grade standards according to requirements of target markets, supporting global customs inspection.

Purchase Inquiry

If you are searching for a reliable supplier of L-Cysteine Hydrochloride with stable batch quality and continuous supply, please contact us for the latest factory quotation and full product datasheet.
We offer sample testing service and support global sea freight. We provide long-term stable amino acid raw material solutions for food factories, pharmaceutical manufacturers, cosmetic producers and biochemical research institutions.