Tags: Chemical Compound, Chemical Substance.
Lactose is a disaccharide sugar derived from galactose and glucose that is found in milk. Lactose makes up around 2–8% of milk (by weight) although the amount varies among species and individuals and milk with a reduced amount of lactose also exists. It is extracted from sweet or sour whey. The name comes from lac or lactis the Latin word for milk plus the -ose ending used to name sugars. It has a formula of C12H22O11.
