Description

3-Cysteinylacetaminophen, Trifluoroacetic Acid Salt is a key metabolite and synthetic intermediate of the widely used analgesic and antipyretic drug, acetaminophen (paracetamol). This compound is of significant value in pharmaceutical research and development, particularly for studying drug metabolism, toxicity pathways, and for use as a reference standard in analytical chemistry. It is primarily utilized by pharmaceutical companies, contract research organizations (CROs), and academic laboratories engaged in pharmacokinetic studies, biomarker research, and the development of analytical methods for drug safety testing.

Application

• Pharmaceutical Reference Standard: Critical for the identification and quantification of acetaminophen-cysteine adducts in bioanalytical methods using HPLC, LC-MS, or GC-MS.
• Metabolite Research: Used in studies investigating the metabolic pathways of acetaminophen, specifically the formation of protein-reactive metabolites linked to hepatotoxicity.
• Biomarker Development: Serves as a standard for developing assays to detect cysteine adducts of acetaminophen, which are potential biomarkers of drug-induced liver injury (DILI).
• Toxicology Studies: Employed in in vitro and in vivo research to understand the mechanisms of acetaminophen overdose and to evaluate potential antidotes or protective agents.
• Chemical Synthesis: Acts as a protected or derivatized intermediate in the organic synthesis of more complex molecules related to acetaminophen metabolism.
• Quality Control: Used by API (Active Pharmaceutical Ingredient) manufacturers to monitor and control potential impurities or related substances in acetaminophen production.

Basic Information

Product Name	3-Cysteinylacetaminophen, Trifluoroacetic Acid Salt
CAS No.	53446-10-9
Molecular Formula	C13H17N2O5S • C2HF3O2
Molecular Weight	426.36 g/mol (as TFA salt)
Synonyms	N-Acetyl-p-benzoquinone imine-Cysteine Adduct (APAP-CYS); Acetaminophen Cysteine Adduct; 3-(Acetylamino)-4-(2-amino-2-carboxyethylthio)phenyl Trifluoroacetate; APAP-CYS TFA Salt; Paracetamol Cysteine Adduct; NAPQI-Cysteine Adduct TFA Salt; 3-Cys-APAP TFA Salt
EINECS	Contact for details

Quality Control

Our 3-Cysteinylacetaminophen, Trifluoroacetic Acid Salt is produced under strict quality management protocols suitable for research and analytical applications. Each batch undergoes comprehensive analysis to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing results from HPLC, NMR, and mass spectrometry are provided to support your research integrity and compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store at -20°C or below under an inert atmosphere for long-term stability. This compound is hygroscopic (moisture-sensitive) and light-sensitive. Allow the sealed container to equilibrate to room temperature before opening to minimize moisture absorption.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (HPLC)	Conforms to reference standard
Identification (MS)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 2.0%
Residual Solvents (GC)	Meets ICH guidelines

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