This compound can only be purified to roughly 96% by standard distillation techniques, since it forms a positive azeotrope with water.
A mixture of glycogen, ammonium acetate, and this compound are added to precipitate DNA from aqueous solutions. Size fractionation columns need to be washed in a buffer solution before use because they are commonly stored in a twenty-percent solution of this compound. This compound's proton NMR spectrum shows a triplet at 1.2 ppm, a singlet at 2.6ppm, and a quadruplet at 3.7 ppm. It's not (*) water, but slides are rinsed with this compound until running clear after adding iodine in the Gram's stain procedure. A 70% concentration of this compound is the standard for sterilizing lab equipment. This compound can only be purified to roughly 96% by standard distillation techniques, since it forms a positive azeotrope with water. For 10 points, name this two-carbon alcohol. 
A mixture of glycogen, ammonium acetate, and this compound are added to precipitate DNA from aqueous solutions.
ethanol [or ethyl alcohol or EtOH; accept any percent amount ethanol, such as 100% or 70% ethanol] 