Citric acid is a weak organic acid that comes in two forms: anhydrous and monohydrate. It's a natural fruit acid that's commonly found in citrus fruits like lemons and limes. Citric acid is used in a variety of applications, including food, beverages, pharmaceuticals, and technical uses. 
Citric acid anhydrous occurs as colourless crystals or as white, crystalline powder with a strongly acidic taste. It is very soluble in water, freely soluble in ethanol (96 %) and sparingly soluble in ether. Citric acid anhydrous is non-toxic and has a low reactivity.