Abstract
Herein we report the clouding behavior of promethazine hydrochloride (PMT) in the absence and presence of electrolytes and polymers. At constant pH, increasing salt additions caused the cloud point (CP; of PMT containing a fixed concentration of a gemini surfactant) to increase, which is explained on the basis of their position in Hofmeister series and the hydrated radii. With quaternary ammonium salts, CP increased due to adsorption/mixed micelle formation. However, the effect of polymer on CP was found to be dependent upon the number of units present in a particular polymer of poly(vinylpyrrolidone) (PVP) category. Thus, the extent of CP variation by different additives is different (dependent on the nature and structure).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
