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Volumetric flask is a part of laboratory glassware used in analytical chemistry for the preparation of solutions. It is made of glass of plastic and consists of a flat bottomed bulb with a long neck, usually fitted with a stopper. The stopper. Is normally made in a chemically resistant plastic such as polypropylene rather than glass. The neck has a single ring graduation mark and a label. The label should show the nominal volume, tolerance, calibration temperature, class, relevant manufacturing standard and the manufacturer’s logo. The glass or plastic is generally clear but may be amber colored for handling light sensitive com sensitive compounds.