Sigma-Aldrich Datasheets for Watch Glasses
Watch glasses are circular, slightly-concave pieces of glass that are used by chemists to evaporate liquids and cover beakers during sample preparation. They are also used to hold solids during weighing.
Watch Glasses: Learn more
| Product Name | Notes |
|---|---|
| Concave, clear annealed soda lime glass with fire-polished edges | |
| Heavy-wall, borosilicate glass with fire-polished edge provides durability. May be slightly out-of-round due to O.D. variability. | |
| Molded-in ribs allow vapors to escape during boiling to eliminate pressure buildup. Meets EPA requirements for methods 3005, 3010, 3020. | |
| With fused edges. Manufactured from Duran borosilicate glass type 3.3 for maximum chemical and thermal shock resistance. Duran is a registered trademark of Schott AG. |