Tender For supply of following laboratory consumables - chemicals , glass-wares & plastic-wares , certified reference materials (iso 17034 accreditated) and laboratory high purity gases [nitrogen gas (grade-one), zero air gas (grade - instrumental), hydrogen gas (grade-zero), nitrogen gas (grade-zero), helium gas 99.999% purity (grade-one), methane, argon, isobutane (99.99%) and liquid nitrogen (high purity 99.9995%]