A humectant attracts and retains the moisture in the nearby air via absorption, drawing the water vapor into and/or beneath the organism's surface. Humectants absorb water vapors from the atmosphere until a certain degree of dilution is attained. Aqueous solutions of humectants can reduce the rate of loss of moisture. Share your knowledge with the interviewer.
"Humectants attract moisture to help an organism achieve a desired level of dilution. Two types of humectants are inorganic humectants and organic humectants. Inorganic humectants Because of compatibility problems and their corrosive nature, inorganic humectants are not frequently used in cosmetics. Calcium chloride is an example. Organic humectants are widely used in cosmetics. The most commonly used organic humectants are glycerol, ethylene glycol, polyethylene glycol (PEG), diethylene glycol, tri ethylene glycol, propylene glycol, dipropylene glycol, glycerin, sorbitol, mannitol, glucose."
"Humectants are used to dilute a substance by attracting and retaining moisture. One type of humectant is metal organic humectants. These are limited used in cosmetics because of compatibility problems, corrosive nature and pronounced taste. One example of this class of humectants is sodium lactate."