Specialty Flasks
Specialty flasks are the backbone of many experimental setups, offering the durability and precision needed for demanding experiments.
Explore our diverse collection, including round bottom flasks, single neck flasks, bioreactor flasks, Ace Glass freeze-drying flasks, and 4 neck flat flange reaction vessel covers. All flasks are carefully designed to withstand the requirements of multiple research and analysis procedures.
In this category, you'll discover renowned brands such as Chemglass, Ace Glass, and Kemtech America, all known for their commitment to quality and innovation in lab glassware.
Whether you're searching for a Schlenk flask, a three-neck round bottom flask, a biomass flask, or a 3-neck flask for your lab, we offer a selection of flask options suitable for a range of experiements. Trust our specialty flasks to provide the precision and durability your research demands.
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Reaction Flask, Spherical
Ace GlassRugged spherical flask with neck opening of 4" (10.2cm). Standard size flasks use regular Glas-Col heating mantles of equivalent capacity. Length of straight section including flange, approximately 9.5cm (33/4 "). Uses 6496 Clamp for securing flask hea
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Adapter Connecting, Side Outlet, NO-AIR
Ace GlassUsed for converting a single neck round bottom flask to air-free or vacuum applications. Outlet can be either 2mm glass stopcock or a 0-3 inlet valve. Upper and lower joint sizes are the same size. Great for adapting flasks and other components for Schlenk lines.
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SYNTHWARE Transfer/Storage Flasks
Kemtech AmericaSYNTHWARE transfer/storage flask for long term storage of deoxygenated solvent. Recovery of solvent is done thru the valve body using a cannula or syringe.
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Round bottom, HEAVY WALL, four neck flask with standard taper outer joints on the center and 20º angled side necks.
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Rugged spherical reaction flask with Duran style flat flange with O-Ring groove, for use with 6517 Quick Release Clamp. Various valve and bottom fitting configurations available, see individual listings. each flask includes a CAPFE (PTFE encapsulated silicone) O-Ring. Plain silicon O-Rings are also…
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Thomas Nos. 1165M15, 1165M16, 1165M17, 1165M18, 1165M19, 1165M20, 1165M21 Jacketed cylindrical flask with flush seal and beaded pipe²inlet and outlets. The flask is graduated on both sides²which allows for either left or right hand orientation.²Features a Schott-Duran style o-ring…
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Cylindrical Reaction Vessels with O-Ring Flange
SP Wilmad-LabGlassThese borosilicate glass cylindrical reaction vessels have a tooled flat flange with an O-ring groove for a greaseless seal. Suitable for vacuum operation. Wall thickness is uniform throughout flask. Note: Use LG-7316 clamps.
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Coupling, Reaction Flask
Ace GlassKF style flange clamp for our 200mm (8 in), 300mm (12 in) and 400mm (16 in) kilo scale reactor vessels. The 200 & 300mm clamps are manufactured of black, phenolic resin while our 400mm clamp is black, powder coated aluminum. Purchase the clamp and appropriate gasket separately. We recommend the…
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Rugged cylindrical jacketed reaction flask with Duran, flat, ground flange and o-ring groove. Various bottom outlet options are available (see details below). For use with 6517 quick release clamp. Jacket inlet/outlets are available with either tangentially sealed o-ring ball joints or with…
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Round bottom, HEAVY WALL, four neck flask with standard taper outer joints on the center and 20º angled side necks.
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Determines CO2 evolution to assess biodegradability by soil and sewerage micro-organisms. Shake flask fits standard laboratory shakers. #7 Ace-Thred side port with Nylon bushing and FETFE O-ring holds a glass septum adapter. Inner well has a capacity of 10 mL plus head space. Well is held securely…
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SolventVap Receiving Flask 1/2Drain Port with PTFE Valve
Across InternationalHigh quality glass drain port with PTFE open/close valve for Ai 3L, 5L, 10L, 20L receiving flasks. Glass material: high borosilicate glass 3.3
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Round bottom, HEAVY WALL three neck flask with standard taper outer joints on the center neck and 20º angled side necks. For Larger Flasks See CG-1524.
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Round bottom, HEAVY WALL, three-flask with standard taper outer joints on the center and side necks. Entire body of the flask is jacketed and has two hose connections for circulation of heating or cooling liquid. Indentations increase agitation of the contents of the flask during stirring. …
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Reaction Flask, Spherical, Jacketed
Ace GlassSpherical, jacketed reaction flask with 100mm (4") flat flange top. Jacket inlet/outlets available with either tangentially sealed 28/15 o-ring ball joints or with Ace-Thred connections. Use 6496-10 clamp to secure head to flask.
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SYNTHWARE Modified Schlenk Flasks with Glass Stopcocks
Kemtech AmericaSYNTHWARE modified Schlenk flask with a standard taper outer joint and 2mm bore glass stopcock in side arm. The Kjeldahl shape permits easy transfer of liquids and solids. The lower portion of the flasks fits standard heating mantles to facilitate heating and stirring.
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This is a 1L PYREX® replacement flask with a 29/42 outer Standard Taper joint for the No. 3840-XL 1L extractor system. The tubulation O.D. on the condenser is 10mm.
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Reaction Flask, Cylindrical, Jacketed
Ace GlassCylindrical jackted reaction flask with a 4" (10.2cm), top opening. Jacket inlet/outlets are available with tangentially sealed with 28/15 O-Ring ball joint connections, or with #11 Ace-Threds, for use with 3/8in tubing.
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Cylindrical Jacketed/Indented Reaction Vessels, O-Ring Flange
SP Wilmad-LabGlassThese borosilicate glass reaction vessels are jacketed with 1/2" hose connectors. They have four indentations for improved stirring and a tooled flat flange with an O-ring groove for a greaseless seal.
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Separation Tube, Glass, 24/40 Joints
GSC International, Inc.Our Separation Tube is made from heat-resistant borosilicate glass, and has a PTFE stopcock and a 24/40 ground glass joint. PRODUCT WARNINGS Our products are not toys . Use in a laboratory or educational setting only. Not for children 13 and under.
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PYREX® Hickman Still Head
CorningThis Hickman Still Head is a replacement part for the 6949M series of PYREX® microchemistry kits.
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Round bottom, HEAVY WALL three neck flask with standard taper outer joints on the center neck and 20º angled side necks. Flasks with 29/26 center necks have a groove tooled just below the grind to aid in clamping of the flask.
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KIMAX Sugar Flasks
DWK Life Sciences (Kimble)Kohlrausch, Class A Borosilicate glass Calibrated to contain 20°C Mouth enlarged for easier introduction of sample Meet NBS requirements
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Biomass Flasks
GSC International, Inc.These biomass flasks are made from quality borosilicate glass. They all have a 24/40 ground glass bottom joint, but their top joints are all different sizes that are designed to fit our various distilling arms . The large top openings are ideal for inserting materials for distillation. …
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Jacketed Cylindrical Reaction Vessels with Flat Flange
SP Wilmad-LabGlassThese jacketed, cylindrical borosilicate glass reaction vessels are without constriction at the top and have a flat bottom. They feature sturdy walls and a tooled flat flange with a surface ground to assure a tight seal. There is a gently sloping contour at junction of side wall and bottom, thus…
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Round bottom, HEAVY WALL, three neck flask with standard taper outer joints on the center and side necks. Lower outlet is a CG-424-05, 4mm straight bore PTFE stopcock.
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Round bottom, HEAVY WALL, four-neck flask with standard taper outer joints on the center neck and vertical side necks. The third neck is a 10/30 outer joint for use with a CG-3506, 10/30 jointed thermometer. Flasks with 29/26 center necks have a groove tooled just below the grind to aid in the…
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4 Neck Molded Reaction Vessel Covers
SP Wilmad-LabGlassThese borosilicate glass 4-neck reaction vessel lids/covers have a contact surface that is finely ground to provide a tight seal. Featuring a flat flange, these pressed lids have a center neck and three side necks with outer Standard Taper joints. Use LG-7316 clamps. NOTE: LG-8081 for use with…
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Flask, Trypsinizing
ChemglassManufactured from Type 1 Class A borosilicate glass with FOUR deep side baffles for optimum agitation during trypsinization. Flask comes with beaded, break-resistant lips and 50mm OD necks. Sold 1 per case.
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Flasks, Tapered, European Style, 3-Necks
ChemglassEuropean style flask with tapered walls and a shallow hemispherical bottom for more efficient mechanical or magnetic stirring. With standard taper outer joints on center and side necks.
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Flask, Pressure, Round Bottom
Ace GlassRound bottom, heavy wall, pressure rated flask. All flasks come complete with a solid PTFE plug seal with front seal FETFE o-ring for better containment of product. Vessels are tested at 1.5x for a working pressure rating at 60PSI at 120°C. Flasks
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Flask, Flat Bottom, Three Neck
Ace GlassFlat bottom, three neck flask can sit on stirrer hot plate with no further support. 250ml and 500ml sizes feature angled side necks while the 1000ml size necks are vertical.