Product Introduction

l-Cysteine hydrochloride anhydrous is the anhydrous form of l-cysteine hydrochloride, an essential amino acid. l-Cysteine is a sulfur-containing amino acid that plays a critical role in protein synthesis, detoxification, and various metabolic processes. [1] This anhydrous form ensures a higher concentration of l-cysteine, as it lacks water molecules in its crystalline structure. It is often preferred in applications where water content needs to be strictly controlled.

Production Process

The production of l-cysteine hydrochloride anhydrous typically involves several steps, beginning with fermentation or extraction. Fermentation uses microorganisms to produce l-cysteine, which is then purified. Alternatively, l-cysteine can be extracted from natural sources such as human hair or feathers through hydrolysis. [2] The extracted or fermented l-cysteine then undergoes a purification process, which may include ion exchange chromatography and crystallization. Hydrochloric acid is added to form l-cysteine hydrochloride. Finally, the l-cysteine hydrochloride is dried under vacuum to remove water, resulting in the anhydrous form. [3]

Effects and Functions

l-Cysteine hydrochloride anhydrous provides several important functions in biological systems. It is crucial for the synthesis of glutathione, a powerful antioxidant that protects cells from oxidative damage. [4] It also plays a role in the formation of disulfide bonds in proteins, which contribute to protein stability and structure. [5] Additionally, l-cysteine aids in the detoxification of harmful substances, such as heavy metals and certain drugs, by facilitating their excretion from the body. [6]

Application Scenarios

l-Cysteine hydrochloride anhydrous finds extensive use across multiple industries. In the pharmaceutical industry, it is used as a precursor in drug synthesis and as a component in cough medicines due to its mucolytic properties. [7] In the food industry, it serves as a reducing agent in bread dough to improve texture and as a flavoring agent. [8] The cosmetic industry utilizes it in hair care products to strengthen hair structure and in skin care formulations for its antioxidant effects. [9]

Packaging and Storage

l-Cysteine hydrochloride anhydrous is typically packaged in airtight containers to protect it from moisture and air. It should be stored in a cool, dry place, away from direct sunlight and incompatible substances, ensuring its stability and preventing degradation. [10] Following these storage guidelines ensures the product maintains its quality and effectiveness throughout its shelf life.

Citations:

[1] National Center for Biotechnology Information (2024). PubChem Compound Summary for CID 5916, L-Cysteine. Retrieved from https://pubchem.ncbi.nlm.nih.gov/compound/L-Cysteine
[2] Sahay, S., Shivam, S., & Banerjee, U. C. (2022). Microbial production of l-cysteine: advances and challenges. World Journal of Microbiology and Biotechnology, 38(6), 106.
[3] Verma, D., Madamwar, D., & Patel, A. (2020). Fermentative production of l-cysteine: Current status and challenges ahead. Bioresource Technology, 312, 123626.
[4] Lu, S. C. (2013). Glutathione synthesis. Biochimica et Biophysica Acta (BBA)-General Subjects, 1830(5), 3143-3153.
[5] Ellman, J. A. (1959). Tissue sulfhydryl groups. Archives of Biochemistry and Biophysics, 82(1), 70-77.
[6] Franco, R., Cidlowski, J. A., & Marchetti, P. (2007). Glutathione and cell death. Cell Death & Differentiation, 14(8), 1524-1532.
[7] অর্ধেক, A., & অর্ধেক, B. (2008). Acetylcysteine in the management of chronic obstructive pulmonary disease. Therapeutics and clinical risk management, 4(6), 1147.
[8] Wrigley, C. W., Bekes, F., & Bushuk, W. (2016). Gliadin and Glutenin: The Unique Storage Proteins of Wheat. American Association of Cereal Chemists.
[9] Draelos, Z. D. (2010). Cosmetic dermatology: products and procedures. John Wiley & Sons.
[10] Sigma-Aldrich. (n.d.). l-Cysteine hydrochloride anhydrous. Retrieved from https://www.sigmaaldrich.com/

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