Description

Benzenesulfonic Acid Impurity 7 is a high-purity chemical reference standard used for analytical and research purposes. This compound is critical for ensuring the quality, safety, and regulatory compliance of pharmaceutical products and fine chemicals. It is primarily utilized by analytical laboratories, quality control departments, and R&D facilities in the pharmaceutical and chemical manufacturing industries for method development, validation, and impurity profiling.

Application

• Pharmaceutical Impurity Reference Standard: Used as a certified reference material (CRM) for the identification and quantification of process-related impurities in Active Pharmaceutical Ingredients (APIs) and drug products.
• Analytical Method Development & Validation: Essential for developing and validating chromatographic methods, such as HPLC and UPLC, to monitor and control impurities.
• Quality Control & Assurance (QC/QA): Serves as a system suitability standard and for routine quality control testing to ensure batch-to-batch consistency and compliance with ICH Q3A/B guidelines.
• Stability Studies: Employed to track the formation and level of specific degradants during forced degradation and long-term stability testing of drug substances.
• Regulatory Submissions: Provides necessary data for regulatory filings (e.g., with FDA, EMA) to demonstrate thorough impurity characterization and control strategies.
• Research & Development: Used in chemical research to study reaction pathways, degradation mechanisms, and to synthesize related compounds.

Basic Information

Item	Detail
Product Name	Benzenesulfonic Acid Impurity 7
CAS No.	172973-70-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Benzenesulfonic acid derivative impurity 7; Benzenesulfonic Acid Related Compound 7; 1,1'-Biphenyl-4-sulfonic acid (probable structure); 4-Phenylbenzenesulfonic acid; p-Phenylbenzenesulfonic acid; 4-Biphenylsulfonic acid; [1,1'-Biphenyl]-4-sulfonic acid; Biphenyl-4-sulfonic acid
EINECS	Contact for details

Quality Control

Our Benzenesulfonic Acid Impurity 7 is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including chromatographic purity assays and spectroscopic identification, to ensure it meets the high standards required for reference materials. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and traceability is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store at controlled room temperature (15-25°C) in a dry environment. For long-term stability, consider storage under inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 95.0%
Related Substances (HPLC)	Total impurities ≤ 5.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%

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