Why is China's stock market falling and how might it affect the global economy? Concerns about inflation, shares and interest rates are raised after âBlack Mondayâ chaos sees billions wiped off markets around the globe.
A polyol is an alcohol containing multiple hydroxyl groups. In two technological disciplines the term polyol has a special meaning: food science and polymer chemistry.n polymer chemistry, polyols are compounds with multiple hydroxyl functional groups available for organic reactions. A molecule with two hydroxyl groups is a diol, one with three is a triol, one with four is a tetrol and so on.
A diol is a chemical compound containing two hydroxyl groups (âOH groups). This pairing of functional groups is pervasive, and many subcategories have been identified. The most common industrial diol is ethylene glycol.Examples of diols in which the hydroxyl functional groups are more widely separated include 1,4-butanediol HOâ(CH 2) 4 âOH and bisphenol A, and propylene-1,3-diol, or beta propylene glycol, HOâCH 2 âCH 2 âCH 2 âOH.n general, organic geminal diols readily dehydrate to form a carbonyl group. For example, carbonic acid ((HO) 2 C=O) is unstable and has a tendency to convert to carbon dioxide (CO 2) and water (H 2 O). Nevertheless, in rare situations the chemical equilibrium is in favor of the geminal diol.