Micronic has introduced a range of laser-etched alphanumeric coded sample storage tubes in the following sizes: 0.5, 0.75, 1.1 and 1.4 mL. The tubes have a flat polypropylene bottom on which the alphanumeric code is encrypted with a laser. Manufactured from a single component , the code cannot fade or peel off, even when subjected to repeated handling, exposure to different solvents or multiple freeze-thaw cycles. Because code clarity will remain unchanged throughout their lifetime, the laser-etched coded tubes offer extreme sample traceability. Incorporating a smooth, external flat surface, the laser-etched alphanumeric tubes offer an easier to read and identify alternative to traditional round bottom alphanumeric tubes for automated applications. Manufactured from high-quality polypropylene in a fully automated class 7 cleanroom environment ensures that the laser etched alphanumeric tubes exhibit absolute product consistency, near zero contaminants and compliance with U.S. and European Pharmacopoeia tests. The tubes resist many organic solvents (DMSO, methanol, dichloromethane), may be autoclaved clean and can be repeatedly freeze-thawed without loss of product performance.