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Previous issue date: 2014-03-25 / Universidade Federal do Rio Grande do Norte / Retinoic acid (RA) and hydroquinone (HQ) assets are widely used in pharmaceutical and cosmetic formulations, for having depigmenting properties and are largely produced in drugstores. To assist in the development of formulations containing the active RA and HQ National Forms of Brazilian Pharmacopoeia (2005 and 2012 ) proposes formulations with different excipients such as cetyl alcohol (AC), cetostearyl alcohol (ACT), methylparaben (MTP), propyl paraben ( PPB), glycerin (GLY), dipropylene glycol (DPG), imidazolidinil urea ( IMD ), cyclomethicone (CCM ), butylated hydroxytoluene (BHT), octyl stearate (ETO), EDTA, decil oleate (ODC) and hydroxipropymethyl celullose (HPMC). One of the difficulties found in most cosmetic formulations is the large number of incompatibilities between the components of the formulations, so the aim this study was to evaluate thermal stability and interactions between these active pharmaceutical ingredients and excipients. The depigmenting agents were analyzed by DSC and TG and excipients were analyzed by TG. The dynamic thermogravimetric curves were obtained on a SHIMADZU thermobalance, model DTG-60, using an alumina crucible, at the heating rate of 10?C min-1, in the temperature range of 25-900 ?C, under an atmosphere of nitrogen at 50 mL min-1. The DSC curves were obtained using Shimadzu calorimeter, model DSC-60, using aluminum crucible, at the heating rate of 10?C min-1, in the temperature range of 25-400?C. The thermogravimetric and calorimetric curves were analyzed using TASYS software SHIMADZU. In this study no were found interactions between AR and the following excipients: MTP, PPB, IMD, ODC, EDTA, CCM, ETO, HPMC. However, were found interactions with the following excipients: AC, ACT, BHT, GLI and DPG. For HQ were found interactions with IMD and DPG. Interactions remained even changing proportions of the mixtures and the ternary. Thus, the studies conducted with excipients of National Formulary from 2005 and 2012 showed that these new excipients do not interact by thermogravimetry with the active pharmaceutical ingredients of this study / A Termogravimetria (TG) e a Calorimetria Explorat?ria Diferencial (DSC) s?o t?cnicas usadas em estudos farmac?uticos para a caracteriza??o de f?rmacos, determina??o da pureza, compatibilidade de formula??es, identifica??o de polimorfismo, avalia??o da estabilidade, decomposi??o t?rmica de f?rmacos e formula??es farmac?uticas. A Hidroquinona (HQ) e produtos contendo HQ t?m sido largamente utilizados como agentes despigmentantes para o clareamento da pele. Os retin?ides, que tamb?m exibem propriedades despigmentantes, s?o compostos que apresentam em sua estrutura o n?cleo b?sico da vitamina A. O ?cido retin?ico (AR) ? um exemplo de despigmentante dessa classe e ? muito utilizado em formula??o cosm?ticas. Para auxiliar no desenvolvimento de formula??es contendo os ativos AR e HQ o Formul?rio Nacional da ANVISA (2005 e 2012) prop?e formula??es com diferentes excipientes como: ?lcool cet?lico, ?lcool cetoestear?lico, parabenos (metil e propil), glicerina, dipropilenoglicol, imidazolidinilur?ia, ciclometicona, BHT, estearato de octila, EDTA, oleato de decila, hidroxipropimetilcelulose. Os agentes despigmentantes e excipientes foram analisados por TG e DSC. As curvas din?micas foram obtidas atrav?s de uma termobalan?a SHIMADZU, modelo DTG-60, usando cadinho de alumina, em uma raz?o de aquecimento de 10 ?C min-1 no intervalo de temperatura 25-900 ?C sob a atmosfera de nitrog?nio com fluxo de 50 mL min-1. As massas das amostras foram aproximadamente 10 ? 0,05 mg. As curvas DSC foram obtidas usando o calor?metro SHIMADZU, modelo DSC-60, em cadinho de alum?nio sob raz?o de aquecimento de 10 ?C min-1, em uma temperatura de 25-400 ?C. As curvas termogravim?tricas e calorim?tricas foram analisadas usando o software TASYS da SHIMADZU. Neste estudo n?o foram encontradas intera??es entre AR e os seguintes excipientes: MTP, PPB, IMD, ODC, EDTA, CCM, ETO, HPMC. No entanto, foram encontradas intera??es com os seguintes excipientes: AC, ACT, BHT, GLI e DPG. Para a HQ foram encontradas intera??es com a IMD e DPG. As intera??es permanecem mesmo alterando as propor??es das misturas, bem como nas tern?rias. Desta forma, os estudos realizados com os excipientes do formul?rio nacional de 2012 da ANVISA mostram que esses novos excipientes n?o interagem por termogravimetria com os ativos deste estudo
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/13505 |
| Date | 25 March 2014 |
| Creators | Mendon?a, C?ndida Maria Soares de |
| Contributors | CPF:02820912460, http://lattes.cnpq.br/1689823596741892, Arag?o, C?cero Fl?vio Soares, CPF:62001728468, http://lattes.cnpq.br/9657118649043311, Concei??o, Marta Maria da, CPF:80542131404, http://lattes.cnpq.br/3141068978315035, Gomes, Ana Paula Barreto |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncias Farmac?uticas, UFRN, BR, Bioan?lises e Medicamentos |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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