Laboratory Flasks
Laboratory flasks are containers which are classified as glassware. They are a number of shapes and sizes with wider bodies or narrower tubular sections at the top or neck. They are specified by how much volume they hold and this is typically given in millilitres. I Reaction flasks are spherical with round bottoms and joints at the neck to connect to other pieces of apparatus. They are made of thick glass and can withstand high pressure, even vacuums. Multiple neck types have up to five necks for complex processes and multiple reagents. Distillation flasks have one narrow neck and thinner glass since this is easier to heat. Some varieties can be test tube or pear-shaped. Reagent flasks are flat-bottomed, cannot withstand high pressure and some have a glass stopper in the neck. Erlenmeyer ones are shaped like a cone and are popular because of their low price. The volumetric ones are used to prepare liquid volumes of high precision while the Dewar flask is double-walled with a vacuum between. Flasks are used for making solutions, holding or collecting samples and volumetrically measuring chemicals. For chemical reactions, they are necessary for mixing, heating, cooling, dissolving, precipitation, distillation or analysis.
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20MM RED SILIC/ALU SEAL 3MM THICK >170øC (1 Supplier)
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20MM SEAL SILICONE/PTFE FOR 20-SC CAP (1 Supplier)
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20MM SEPTA PTFE VIRGINAL 53ø SHORE D 0.2 (1 Supplier)
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20MM SEPTA SILICONE/PTFE TRANSP. 3.0MM (1 Supplier)
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20MM SEPTA SILICONE TR. BL/PTFE WH 13MM (1 Supplier)
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20MM SEPTA VITON70ø SHORE A 1.5MM (1 Supplier)
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20MM SILICONE/PTFE SEAL 1.5MM THICK (1 Supplier)
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20MM SILICONE/PTFE SEAL 3MM THICK (1 Supplier)
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22 GUAGE NEEDLE LUER HUB BLUNT (1 Supplier)
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22 MM CLOSURE : TRANSPARENT PE CAP (1 Supplier)
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22MM COMBINATION SEAL: PE-CAP (1 Supplier)
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22MM COMBINATION SEAL: PE CAP TRANSP. (1 Supplier)
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22MM PE-CAP 6MM HOLE CAP HEIGHT 9.1MM (1 Supplier)
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22MM PE-CAP, 9.2MM, SILICONE/PTFE, 1.3MM (1 Supplier)
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22MM PE-CAP HEIGHT 8.4MM BUTYL/PTFE 55ø (1 Supplier)
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22MM SEPTA SILICONE WHITE/PTFE RED 45ø (1 Supplier)
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24MM COMBINATION SEAL PP-SCREW CAP WHITE (1 Supplier)
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24MM PP SCREW CAP WHITE CLOSED TOP (1 Supplier)
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24MM SCREW CAP, CL.TOP, BUTYL/PTFE, 2.5MM (1 Supplier)
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24MM SEPTUM, SILICONE BL/PTFE WHT, 1.3MM (1 Supplier)
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250 ml White HDPE Bottle without Closure (1 Supplier)
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25CM SUSPENSION TC FLASK (1 Supplier)
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25CM TC FLASK WITH GRID (1 Supplier)
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2.5ML NECKLESS VIAL - CLEAR (1 Supplier)
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2IN1 KIT: 0, 3ML SHORT THREAD (1 Supplier)
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