In the vast landscape of chemical compounds, each substance is assigned a unique identifier, the Chemical Abstracts Service (CAS) Registry Number. For 4,5-Dichloro-1,2-Phenylenediamine, this number is 5348-42-5. This CAS number serves as a universal key, ensuring precise identification and facilitating clear communication across scientific, industrial, and regulatory bodies worldwide. It is particularly crucial for intermediates like this, which have specific applications in fields such as pharmaceutical synthesis.

The compound identified by CAS No. 5348-42-5, also known as 4,5-Dichloro-1,2-Phenylenediamine, is a red-brown to brown crystalline solid. Its utility as a pharmaceutical intermediate, especially in the production of antiviral agents like Maribavir, makes its accurate classification and identification paramount. Companies like Nanjing Xinbell Pharmaceutical Technology Co., Ltd. adhere to strict quality protocols, including high purity standards (>98%) and certifications like GMP, ISO 9001, and FDA, all linked to this specific CAS number.

Understanding the significance of CAS No. 5348-42-5 is essential for anyone involved in the chemical supply chain, from researchers to procurement specialists. It guarantees that the material being handled is precisely what is intended, avoiding costly errors and ensuring the safety and efficacy of end products, whether they are life-saving drugs or novel research materials. The CAS number acts as a critical quality assurance marker for this vital chemical intermediate.