L-Cysteine

The free-base form of L-Cysteine, the sulfur-containing amino acid distinct from the dominant hydrochloride salt (catalog id 8019) by absence of the chloride counter-ion. Used in applications where chloride contribution would be problematic and where the free amino acid is specifically required.

White crystalline powder with characteristic faint sulfurous odor. Less hygroscopic than the hydrochloride salt but with lower water solubility.

We supply food-grade and pharmaceutical-grade L-Cysteine free base from manufacturers in China holding ISO, Halal, Kosher and other certifications relevant to the product and production.

Common market grades include Standard Food Grade (FCC compliant) and Pharmaceutical Grade meeting BP/USP/EP specifications.

Bulk and reduced-MOQ shipments. Batch-level COA covering assay, specific rotation, related amino acids, heavy metals, and microbiology.

This SKU is the free-base form of L-Cysteine, distinct from the dominant L-Cysteine Hydrochloride (catalog id 8019) by counter-ion. The free amino acid is produced by ion-exchange or alkaline-precipitation conversion from the hydrochloride salt.

Regulatory status follows that of L-Cysteine HCl. The free base form provides 100 percent L-Cysteine activity by mass (versus approximately 80 percent for the HCl salt), supporting premium positioning in supplement applications.

Strategic positioning serves specialty pharmaceutical and premium supplement applications where the chloride-free form delivers specific advantages over the standard HCl salt.

• Pharmaceutical applications: parenteral nutrition where chloride load matters
• Premium dietary supplements: glutathione-support and detoxification-positioned formulations
• Specialty bakery applications avoiding chloride contribution
• N-Acetyl-L-Cysteine (NAC) manufacturing feedstock
• Specialty cosmetic and skincare applications
• Research and analytical applications
• Specialty pet supplement applications