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- W2089827905 abstract "Dihydroxystearic acid (DHSA) has been prepared from palm oleic acid via catalytic reaction. An in vivo test confirmed that the use of DHSA at 5% and below is nonirritating. With two vicinal alcohol groups positioned at C9 and C10, DHSA has been found to be applicable in cosmetics as thickeners or gelling agents. Stearic acid is known to be used as a stick‐gel foaming agent. The aim of this study was to examine the possibility of combining the potential stick‐forming properties of DHSA with antimicrobial properties, and at the same time to determine its key physical properties and the deodorant efficacy of this raw material. A ternary phase diagram of palm‐based dihydroxystearic acid (DHSA)/propylene glycol (PG)/sodium hydroxide was constructed at 80°C. The phase changes were observed visually through polarizer film and a polarizer microscope. The result showed that the anisotropic properties changed from isotropic, lamellar liquid crystals identified as Maltese cross patterns and 2‐phases. Deodorant sticks developed based on the Maltese cross pattern showed the most stable network. Formulae D4 (antimicrobial active and perfume), D5 (antimicrobial active), D6 (perfume), and D7 (without antimicrobial and perfume) were compared with C1 and C2, commercially available sodium stearate‐based deodorant sticks. The sticks were characterized for pH, softening point, hardness, disintegration time, syneriesis upon three months' storage and in vivo microbial test. The physicochemical properties remain unchanged after three months' storage. The screening for bacteria type was made using blood agar media and the species identified was Staphyloccocus. In manittol agar and saboroud media, it inhibited the bacteria and fungus/yeast growth for at least four to eight hours in D7. The same results were found with the rest of the samples." @default.
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- W2089827905 date "2006-07-01" @default.
- W2089827905 modified "2023-09-24" @default.
- W2089827905 title "The Advantages of Palm‐Based Dihydroxy Stearate in Deodorant Sticks" @default.
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- W2089827905 doi "https://doi.org/10.1080/01932690500357487" @default.
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