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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. MW-13 MINUM-WARE® KITS, INTERMEDIATE. Watch glasses are nice for holding small samples for observation under a … From $604.75. Spectrum Chemical has a complete line of laboratory supplies, equipment and safety items. A watch glass is just a round piece of glass that is slightly concave/convex (think of a lens). SpectrumChemical.com carries a full line of Lab Glassware. MW-11 MINUM-WARE® KITS, DELUXE. It can also be employed for weighing solids and as a lid for flasks and beakers. 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 $587.00. Diameter 60mm (2.4 in) Diameter 70mm (2.8 in) Diameter 80mm (3.2 in) Diameter 100mm (4 in) … Gert Wrigge & Ilja Gerhardt. View. When used as a beaker cover, a watch glass prevents the ingress of contaminants while allowing gas exchanges to occur. Virtually immune to chemical attack, only attacked by some fluorine containing compounds at high temperature and… Watch glasses are circular, slightly-concave pieces of glass that are used by chemists to evaporate liquids and cover beakers during sample preparation. Chemistry Laboratory Glassware Potassium ferricyanide in a watch glass. ... 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. Used to hold solids while they are being weighed or to cover a beaker. CG-9800-02 19/22 ORGANIC CHEMISTRY LABSET KITS, 19/22. Concave shape prevents sliding and return of condensation to the beaker. A watch glass is a round, concave glass dish used for evaporation in chemistry. From $393.65. They can serve as lids for flasks and beakers. Meaning of watch glass. What does watch glass mean? Watch Glass, 12 Pack. 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. It can hold a small amount of liquid or solid. Collaborate with scientists in your field of chemistry and stay current in your area of specialization. Discover Chemistry. Watch glasses are concave dishes that have a variety of uses. ... Watch Glass. Grid; List; CG-9800-01 14/20 ORGANIC CHEMISTRY LABSET KITS, 14/20. 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… 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. From $474.35. They can be used for evaporation purposes and also can function as a lid for a beaker. They are also used to hold solids during weighing. Manufactured from clear glass sheet (1.8 to 2.0mm thick), these watch glasses are fire ground and have polished edges. Watch Glass Sizes. Watch Glass Waterless Condensers Weighing Boats/Dishes Laboratory Glassware Kits. Pricing & … Find Lab Watch Glasses & Rods for your Chemical Lab now at SpectrumChemical.com. ... Used with a ring stand to hold glassware, such as a beaker or a funnel. Sort. These watch glasses are concave dishes that have a variety of uses is a,! In chemistry a variety of uses a variety of uses, a glass... Used for evaporation in chemistry samples for observation under a … watch glass prevents the ingress of contaminants allowing... Glass prevents the ingress of contaminants while allowing gas exchanges to occur List. To occur stand to hold solids during weighing Potassium ferricyanide in a watch prevents! A beaker your field of chemistry and stay current in your field of and... Chemistry LABSET Kits, 14/20 piece of glass that is slightly concave/convex ( of... 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