Water-soluble buffering agent

Tetiafluoioethylene—peifluoiopiopyl vinyl ethei copolymeis [26655-00-5] aie made in aqueous (1,2) oi nonaqueous media (3). In aqueous copolymerizations water-soluble initiators and a perfluorinated emulsifying agent are used. Molecular weight and molecular weight distribution are controlled by a chain-transfer agent. Sometimes a second phase is added to the reaction medium to improve the distribution of the vinyl ether in the poljmier (11) a buffer is also added. 

AMP is used as an emulsifier and a buffering agent. It controls the water solubility of the resin film in hairsprays, and makes the finished film more resistant to humidity. 

The emulsifier aminomethyl propanol serves several purposes in hairspray. It acts as a buffering agent, controlling the acidity of the mixture to make it neutral ( pH balanced ). It also helps keep the polymers mixed with the water and alcohol, and controls the water solubility of the final mist, giving it the needed humidity resistance. It also helps to form the polymers into a gel. 

An oral suspension of chlorpromazine has the following composition and must be extracted so that excipients are removed prior to analysis by UV spectrophotometry Chlorpromazine 0.025% w/v, parahydroxybenzoic acid methyl ester 0.1 % w/v, neutral water soluble dye, lipophilic flavouring agent, sodium lactate buffer. 

Yellow 86 and 132 for yellow, and a combination of Acid Red 52 and Reactive Red 180 for magenta. The know-how is contained in the formulation. It consists of deionized water, 60-90% water-soluble solvent (e.g., propanol, 5-30% surfactant, 0.1-10% buffer, 0.1-0.5% biocide, 0.05-1%), and other additives (chelating agent, defoamer, solubilizer, etc.) >1%. 

Malic acid Antioxidant, buffering agent, flavoring agent, chelating agent The powder form has a strongly acid taste and is freely soluble in ethanol and water. However, aqueous solutions are mildly corrosive to carbon steels... 

Copper Complexes. The preparation of copper and nickel complexes of tridentate metallizable azo and azomethine dyes is easily carried out in aqueous media with copper and nickel salts at pH 4-7 in the presence of buffering agents such as sodium acetate or amines. Sparingly water soluble precursors can be metallized in alkaline medium at up to pH 10 by using an alkali-soluble copper tetram(m)ine solution as coppering reagent, which is available by treating copper sulfate or chloride with an excess of ammonia or alkanolamines [3],... 

Finally, although the use of tributyltin hydride is possible in water with or without a detergent as a solubilizing agent [224], noteworthy is the preparation of a water-soluble tin hydride which can be used for the reduction of alkyl halides in phosphate buffer in the presence of a radical initiator. In this way, water-soluble compounds such as unprotected sugars can be used directly without tedious protection/deprotection steps [225]. 

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