Análisis por solubilidad de fases del lobenzarit disódico

Authors

  • Nancy Alberto-Pizarro Centro de Química Farmacéutica
  • Lauro Nuevas-Paz Centro de Química Farmacéutica
  • Ulises Jáuregui-Haza Centro de Química Farmacéutica

Abstract

Assay of drugs needs in most cases the uses of Chemical Reference Substances of know purity. The purity
of CRS is evaluated by absolute methods. Phase solubility analysis has the advantage of being an absolute method and it
does not require knowledge of the nature of the impurities. Lobenzarit, 2-[(2-carboxifenil)amino]-4-chlorobenzoic acid, is
from fenamate family. The commercial drug is prepared as the disodium salt and used in the treatment of rheumatoid
arthritis. In this work phase solubility analysis was used to establish the purity of lobenzarit disodium standard. The
solubility and the equilibrium time of lobenzarit disodium were studied in several solvents and its mixtures with water at
20 and 40 ºC . Solvent system and temperature of the analysis were chosen such that solubility of lobenzarit disodium was
in the range 4-25 mg of solute per gram of solvent and the reached equilibrium time was minimal. Data were analysed by
the least squares method with a resulting correlation coefficient better than 0.99. The purity found for lobenzarit disodium
was 99.61 %.

Published

2020-12-28

How to Cite

Alberto-Pizarro, N. ., Nuevas-Paz, L., & Jáuregui-Haza, U. . (2020). Análisis por solubilidad de fases del lobenzarit disódico. NATIONAL CENTER FOR SCIENTIFIC RESEARCH (CENIC) CHEMICAL SCIENCES JOURNAL, 39(1), 07-010. Retrieved from https://revista.cnic.cu/index.php/RevQuim/article/view/698

Issue

Section

Research articles