METHYL SALICYLATE MICROEMULSION BASED SYSTEMS. PART I: EFFECT OF ADDITIVES ON THE PHYSICOCHEMICAL PROPERTIES


Warunee Leesajakul, Charanai Taworn, Sunee Charnnarong

Abstract


Ojectives: The objective was to determine the use of methyl salicylate, the oily active substance, as oil phase in a given surfactant system of Tween 20-IPA(1:1) in microemulsion preparation and also to investigate the effects of additives in the oil phase as well as their amounts on the physicochemical properties of such microemulsions.

Methods: The pseudoternary phase diagram of methyl salicylate/Tween 20-IPA(1:1)/water system was first constructed as control. Then, other additive-containing systems were investigated to illustrate their phase behaviors. Each additive was incorporated at three different weight ratios of methyl salicylate to additive varying as 3:1, 2:1, 1:1. Afterwards the single phase liquid systems composed of 15% oil phase in the absence and the presence of additives, 50% the Tween 20-IPA (1:1) mixture, and 35% water were prepared and characterized.

Results: Methyl salicylate was successfully used as oil phase in microemulsion preparation. All obtained formulations in the absence and the presence of additives were o/w microemulsions. They showed acceptable physicochemical properties of microemulsion characteristics, which had low viscosity with Newtonian flow. After long term stability for 1 year, the methyl salicylate microemulsion showed good physical stability. The systems containing menthol, isopropyl palmitate or isopropyl myristate as additive at the methyl salicylate-additive weight ratios of 3:1 and 2:1 also showed good physical appearance.

Conclusions: Menthol, IPP and IPM were proper additives in this study at the methyl salicylate-additive weight ratios of 3:1 and 2:1.

Keywords: Methyl salicylate/Tween 20-IPA, Methyl salicylate, Microemulsions.

 


Keywords


Methyl salicylate/Tween 20-IPA, Methyl salicylate, Microemulsions.

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About this article

Title

METHYL SALICYLATE MICROEMULSION BASED SYSTEMS. PART I: EFFECT OF ADDITIVES ON THE PHYSICOCHEMICAL PROPERTIES

Keywords

Methyl salicylate/Tween 20-IPA, Methyl salicylate, Microemulsions.

Date

28-07-2014

Additional Links

Manuscript Submission

Journal

International Journal of Pharmacy and Pharmaceutical Sciences
Vol 6, Issue 7, 2014 Page: 137-141

Online ISSN

0975-1491

Authors & Affiliations

Warunee Leesajakul
Department of Pharmaceutical Technology Faculty of Pharmaceutical Science Huachiew Chalermprakiet University 18/18 Bangna-Trad Road Bangplee, Samutprakarn 10540, Thailand
Thailand

Charanai Taworn
Department of Pharmaceutical Technology Faculty of Pharmaceutical Science Huachiew Chalermprakiet University 18/18 Bangna-Trad Road Bangplee, Samutprakarn 10540, Thailand
Thailand

Sunee Charnnarong
Department of Pharmaceutical Technology Faculty of Pharmaceutical Science Huachiew Chalermprakiet University 18/18 Bangna-Trad Road Bangplee, Samutprakarn 10540, Thailand
Thailand


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