Cholesterol 99% AR is a highly purified, Analytical Reagent (AR) grade chemical compound consisting of minimum 99.0% pure cholesterol. In laboratory and industrial workflows, “AR” (or “Pro Analysi”) indicates that this grade meets rigorous chemical purity standards, making it ideal for quantitative biochemical testing, pharmaceutical synthesis, and cell membrane modeling.Cholesterol 99% AR (Analytical Reagent) grade is an ultra-pure steroid alcohol primarily used as a reference standard, biochemical intermediate, and structural component in advanced laboratory research. This exceptionally high purity level is essential to ensure that trace lipid impurities do not interfere with sensitive analytical instruments or biological assays. While cholesterol is a familiar term in cardiovascular health, in a laboratory or chemical setting, this 99% pure crystalline compound serves as a vital biochemical standard, substrate, and structural building block for research.