What does watch glass mean? Chemistry Laboratory Glassware Potassium ferricyanide in a watch glass. Watch Glass Sizes. A watch glass is a circular, slightly convex-concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, or as a cover for a beaker. From $474.35. Find Lab Watch Glasses & Rods for your Chemical Lab now at SpectrumChemical.com. They can serve as lids for flasks and beakers. Spectrum Chemical has a complete line of laboratory supplies, equipment and safety items. Grid; List; CG-9800-01 14/20 ORGANIC CHEMISTRY LABSET KITS, 14/20. Virtually immune to chemical attack, only attacked by some fluorine containing compounds at high temperature and… From $604.75. Watch glasses are concave dishes that have a variety of uses. Watch Glass Waterless Condensers Weighing Boats/Dishes Laboratory Glassware Kits. Watch glasses are nice for holding small samples for observation under a … Collaborate with scientists in your field of chemistry and stay current in your area of specialization. View. From $587.00. It can also be employed for weighing solids and as a lid for flasks and beakers. They are also used to hold solids during weighing. Concave shaped watch glass used as a surface to evaporate a liquid, to hold solids while being weighed, or as a cover for flasks or beakers. Used to hold solids while they are being weighed or to cover a beaker. Pyrex has its origins in the early 1910s, when American glass company Corning Glass Works began looking for new products to feature its borosilicate glass… Gert Wrigge & Ilja Gerhardt. Pricing & … Manufactured from clear glass sheet (1.8 to 2.0mm thick), these watch glasses are fire ground and have polished edges. They can be used for evaporation purposes and also can function as a lid for a beaker. Concave shape prevents sliding and return of condensation to the beaker. A watch glass is a circular, slightly concave piece of glass used in chemistry as a surface to evaporate a liquid, or as a cover for a beaker. It can hold a small amount of liquid or solid. Isostatically molded beaker covers (watch glass) from virgin polytetrafluoroethylene and machine finished to give a smooth surface for ease of cleaning and to eliminate contamination. CG-9800-02 19/22 ORGANIC CHEMISTRY LABSET KITS, 19/22. Discover Chemistry. A watch glass is just a round piece of glass that is slightly concave/convex (think of a lens). MW-11 MINUM-WARE® KITS, DELUXE. Diameter 60mm (2.4 in) Diameter 70mm (2.8 in) Diameter 80mm (3.2 in) Diameter 100mm (4 in) … ... Watch Glass. Watch glasses are circular, slightly-concave pieces of glass that are used by chemists to evaporate liquids and cover beakers during sample preparation. From $393.65. 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