According to the Encyclopaedia Britannica, C6H12O6 is the molecular formula for the carbohydrate glucose. C6H12O6 also makes up the formula for a number of other compounds, including fructose, galactose and inositol.
Glucose is the main sugar found in the blood of humans and is an important energy source for the body. Glucose, also known as dextrose, is one of the simple sugars or monosaccharides. Monosaccharides are important because they compose carbohydrates and can be categorized based on the number of carbon atoms they contain. Glucose has six carbon atoms, so it is considered a hexose. Two other important hexoses are fructose and galactose.
Monosaccharides can combine with each other to form polysaccharides. Cellulose and starch are both polysaccharides of glucose.