L-cysteic acid

L-Cysteic acid (CAS 498-40-8), also known as Cysteinesulfonic Acid, is a naturally occurring sulfonic amino acid derivative found in oxidized cysteine pathways.

Where is L-cysteic acid used?

• Food and flavor systems: acidic and savory taste profiles, particularly in processed foods
• Flavor enhancer formulations targeting umami-adjacent sensory characteristics
• Pharmaceutical manufacturing: intermediate in the synthesis of taurine and other sulfur-containing amino acid derivatives
• Peptide chemistry and biochemical research: reference standard and building block for synthesizing sulfonic acid-bearing peptides
• Life science: cell culture media development and metabolic pathway research
• It functions as a flavoring agent and acidulant.

Commercial specifications

• Pharmaceutical-grade material produced to meet purity thresholds suitable for API intermediate use
• Packaging from small quantities for laboratory procurement to bulk quantities for industrial synthesis