humectant

Definitions of humectant
1

n any substance that is added to another substance to keep it moist

Types:
propanediol, propylene glycol
a sweet colorless, viscous, hygroscopic liquid used as an antifreeze and in brake fluid and also as a humectant in cosmetics and personal care items although it can be absorbed through the skin with harmful effects
Type of:
substance
a particular kind or species of matter with uniform properties

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