Description

4-S-Cysteinylphenol (CAS NO 73243-10-4) is a specialized sulfur-containing phenolic compound that serves as a critical building block in advanced organic synthesis and biochemical research. Its unique structure, combining a phenol moiety with a cysteine-derived side chain, makes it a valuable precursor for developing novel materials and bioactive molecules. This high-purity intermediate is essential for researchers and manufacturers in the pharmaceutical, cosmetic, and specialty chemical industries seeking to innovate in areas like melanin-related chemistry and antioxidant systems.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of melanin-related compounds and potential drug candidates targeting pigmentation disorders.
• Cosmetic & Dermatological Research: Used in the development of active ingredients for skin care formulations, particularly those focused on antioxidant protection and skin brightening.
• Biochemical Probe: Serves as a model compound in enzymatic studies related to tyrosinase activity and melanogenesis pathways.
• Organic Synthesis Building Block: Utilized in the preparation of more complex sulfur- and phenol-containing molecules for material science and fine chemical applications.
• Antioxidant Studies: Employed as a reference standard or test compound in research on phenolic antioxidants and redox biology.

Basic Information

Item	Detail
Product Name	4-S-Cysteinylphenol
CAS No.	73243-10-4
Molecular Formula	C9H11NO2S
Molecular Weight	197.25 g/mol
Synonyms	4-(Cystein-S-yl)phenol; 4-Hydroxyphenylcysteine; L-Cysteinylphenol; 5-[2-Amino-2-carboxyethyl]sulfanyl]phenol; Cysteinylphenol; 4-S-Cysteinylphenol; 4-(2-Amino-2-carboxyethylthio)phenol
EINECS	Contact for details

Quality Control

Our 4-S-Cysteinylphenol is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity assessment and spectroscopic methods for structural confirmation, to ensure it meets the high standards required for research and development. A Certificate of Analysis (COA) detailing specific results for identity, purity, and impurities is provided with every shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its sensitivity to oxidation, it is recommended to store the product under an inert atmosphere for long-term preservation. Keep the container tightly sealed in a dry environment to minimize exposure to moisture.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Heavy Metals	≤ 20 ppm
Residue on Ignition	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.