Invenza Research

Lufenuron EP Impurity B (CAS No. 2767988-84-9), chemically known as 1-(2,5-Dichloro-4-hydroxyphenyl)-3-(2,6-difluorobenzoyl)urea (as per EP) ; N-[(2,5-Dichloro-4-hydroxyphenyl)carbamoyl]-2,6-difluorobenzamide (as per USP), is a well-characterized pharmaceutical impurity reference standard associated with Lufenuron. It is widely used by pharmaceutical research laboratories, analytical scientists, contract research organizations (CROs), and quality control laboratories to support impurity identification, chromatographic method development, analytical method validation, and stability studies.

This reference standard plays an important role in ensuring accurate impurity profiling during the development and quality assessment of Lufenuron-based pharmaceutical products. It is suitable for use in analytical techniques such as HPLC, LC-MS, UPLC, and other validated chromatographic methods where reliable impurity characterization is required.

Lufenuron EP Impurity B has the molecular formula C14H8Cl2F2N2O3 and a molecular weight of 361.1 g/mol. It is also known by the chemical name 1-(2,5-Dichloro-4-hydroxyphenyl)-3-(2,6-difluorobenzoyl)urea (as per EP) ; N-[(2,5-Dichloro-4-hydroxyphenyl)carbamoyl]-2,6-difluorobenzamide (as per USP) and is identified by CAS No. 2767988-84-9.

Researchers and analytical laboratories utilize this impurity reference standard during pharmaceutical development, quality control testing, method transfer, and regulatory compliance activities. Its use helps support the characterization and monitoring of related substances throughout the product lifecycle.