KIMAX* Melting Point Capillary Tubes

Melting point capillary tubes are made of KIMAX-51 glass. The use of soda-lime glasses is not recommended for this work. A partial immersion thermometer, calibrated for 75 mm, is specified in most methods for the determination of melting points. Tubes are 100 mm long when supplied with both ends open, so that approximately 90 mm will remain after sealing. Tube length insures that the open end will extend well above the bath's surface to prevent the bath liquid from entering the tube.