3rd Edition of

Chemistry World Conference

June 14-15, 2023 | Online Event

Chemistry 2023

Siva Krishna Muchakayala

Speaker at Chemistry World Conference 2023 - Siva Krishna Muchakayala
Douglas Pharma US Inc, United States
Title : Implementation of analytical quality by design and green chemistry principles to develop an ultra-high performance liquid chromatography method for the determination of fluocinolone acetonide impurities from its drug substance and topical oil formulations


An anti-inflammatory skin condition is treated with fluocinolone acetonide (FLA), a synthetic corticoid. The current study aims to develop a stability-indicating UPLC method for the determination of impurities present in fluocinolone acetonide and its topical oil formulation. The method development was performed by implementing Analytical Quality by Design (AQbD) and green chemistry principles. A detailed risk assessment was conducted based on the cause-and-effect relationship. d-optimal split-plot design was employed to screen the critical method parameters (CMPs). The central composite design (CCD) was employed to optimize the final method conditions. p-values for the model and lack of fit were <0.0001 and >0.05, respectively, which indicates the best fit statistical model for the studied responses (peak resolutions R1 – R5). The critical method attributes (CMAs) and CMPs such as the ratio of ACN: Water in mobile phase-B as 600:400 (v/v), the ratio of mobile phase-A & B in initial gradient program as 60:40, flow rate as 0.3 mL min−1, and column oven temperature as 50 °C were optimized from the CCD. The best possible separation among all components was achieved with a gradient elution using Waters Acquity UPLC HSS C18, 100 mm × 2.1 mm, 1.8 μm analytical column. The optimized gradient program is time (min)/%B: 0.0/40, 1.5/40, 6.0/60, 8.0/70, 9.0/80, 12.0/100, 15.0/100, 15.1/40 & 18.0/40. Optimization of diluent is highly critical for any oil-based formulations. The experimental results show that acetonitrile is the most suitable diluent for the current study. The method validation was executed in compliance with ICH and USP ⟨1225⟩ guidelines. Mean recovery of the impurities ranged between 95.7 and 105.7%, the correlation coefficient(r) was> 0.999, the RSD values (n = 6) ranged between 0.9 – 3.2% across the range for LOQ – 150% levels. The peaks from the specificity study did not interfere with the known and active analyte peaks. The major degradation products were identified as Imp-C, B, and A, and established their degradation pathways from FLA based on the stress studies. The method greenness was evaluated using GAPI, AGREE and analytical eco scale and found that the method is green. 


I am very happy to introduce myself Siva Krishna Muchakayala working as a principal scientist at Douglas Pharma US Inc, Warminster, Pennsylvania, USA-18974. I have 15 years of experience and subject matter expert in developing analytical methods using chromatographic techniques such as UPLC, HPLC and GC. Good at identification of unknown peaks by using mass spectrometry and also coupled with GC and LC. Plenty of experience in Quality by Design and Design of Experiments based analytical methods development. I have been published my articles in reputed journals Analytical methods (Royal Society of Chemistry), Journal of the Iranian chemical society (Springer), Journal of Chromatography A (Elsevier) Journal of Separation Science and Biomedical Chromatography (Wiley) and few more articles are under review by Nature Scientific Reports, Journal of AOAC international and Journal of Hazardous Materials.