3% L-Cysteine Hydrochloride

Updated: 2026-08-28

Overview

L-Cysteine Hydrochloride is the hydrochloride salt of L-cysteine, a sulfur-containing amino acid. It is widely used in industrial applications due to its reducing and stabilizing properties. The compound is derived from natural sources like human hair or synthesized through fermentation processes. In the food industry, it acts as a dough conditioner and flavor enhancer. In pharmaceuticals, it serves as an antioxidant and detoxifying agent. Its versatility makes it a valuable ingredient across multiple sectors.

Physical and Chemical Properties

L-Cysteine Hydrochloride appears as a white crystalline powder with a slight characteristic odor. It is highly soluble in water, making it easy to incorporate into aqueous solutions. The compound decomposes at temperatures around 175-180°C, releasing hydrogen chloride gas. Chemically, it functions as a reducing agent, capable of breaking disulfide bonds in proteins. This property is particularly useful in baking and pharmaceutical formulations. Its stability under normal storage conditions ensures a long shelf life when properly handled.

Main Applications

In the food industry, L-Cysteine Hydrochloride is used to improve dough elasticity and reduce mixing time. It also enhances flavors in meat products and acts as a preservative in fruit juices. The pharmaceutical sector utilizes it in formulations for liver protection and antioxidant therapies. Cosmetic applications include its use in hair care products to break keratin bonds for perming or straightening treatments. Its multifunctional nature ensures demand across diverse industries, with food and pharmaceuticals being the largest consumers.

Safety and Storage

L-Cysteine Hydrochloride should be stored in a cool, dry environment away from oxidizing agents to prevent degradation. Exposure to moisture or high temperatures can compromise its stability. Proper ventilation is essential to avoid inhalation of dust particles. Safety measures include wearing gloves, goggles, and masks when handling the powder. Ingestion or prolonged skin contact should be avoided. In case of exposure, rinse thoroughly with water and seek medical advice if irritation persists.

B2B Procurement Guide

When procuring L-Cysteine Hydrochloride, prioritize suppliers with certifications like ISO or GMP to ensure quality. Request detailed specifications, including purity levels and CAS number verification. Bulk purchases typically offer cost savings, but ensure proper storage facilities are available. Consider lead times and logistics, especially for international shipments. Some suppliers provide customized packaging options to meet specific industrial needs. Always review safety data sheets (SDS) before finalizing orders.