Overview
The impurity reference standard with CAS number 4470-85-2 is a critical tool in pharmaceutical analysis, specifically for identifying and quantifying impurities in drug substances and products. It serves as a benchmark in chromatographic methods such as HPLC and GC to ensure compliance with regulatory standards like ICH Q3A/B. These standards are typically synthesized or isolated to high purity (≥95%) and are accompanied by detailed certificates of analysis (CoA). Their use is mandated in pharmacopeial testing and during drug development to assess stability, safety, and efficacy.
Physical and Chemical Properties
The impurity standard appears as a white to off-white powder or crystalline solid, with solubility in common organic solvents like methanol and acetonitrile. Its exact molecular formula and weight are often proprietary but are specified in the accompanying CoA. Stability is a key consideration; degradation can occur under exposure to light, heat, or humidity. The standard’s spectral data (e.g., UV, MS, NMR) are typically provided by suppliers to facilitate method development and validation in labs.
Main Applications
This standard is primarily used in pharmaceutical quality control to detect and quantify impurities during drug manufacturing. It aids in method validation for compliance with ICH guidelines, ensuring that impurity levels remain below toxicological thresholds. Additionally, it supports stability studies to monitor degradation products over time. Research labs also employ it to develop analytical techniques for novel drug formulations, making it indispensable in both regulatory and R&D settings.
Safety and Storage
Due to its potential toxicity, handling requires gloves, lab coats, and eye protection. Work should be conducted in a fume hood to avoid inhalation of fine particles. Long-term storage demands airtight containers under refrigerated conditions (2-8°C) with desiccants to prevent moisture absorption. Suppliers often provide stability data; adherence to these recommendations ensures the standard’s integrity throughout its shelf life.
B2B Procurement Guide
When procuring this standard, prioritize suppliers with ISO 17025 or GMP certification to guarantee traceability and accuracy. Request batch-specific CoAs detailing purity, impurity profiles, and analytical methods. Pricing varies significantly based on purity (e.g., 95% vs. 98%) and quantity. Bulk purchases may offer cost savings, but confirm storage viability. Lead times can be lengthy for custom-synthesized standards, so plan procurement aligned with project timelines.
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