From organic laboratory experiments to environmental chemistry, fractional distillation to simple extractions, we understand that the demands on chemistry glassware are unique. We’ve assembled a broad range of products to support your efforts, whether you’re looking for extractors or distillation supplies, flat flange products or vacuum pumps. For small scale applications, we offer full chemistry kits that include standard laboratory and chemistry glassware. And, for your convenience, we’re happy to customize your kit components to best match your specific needs.

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When extracting for samples heavier than water, we recommend our continuous liquid/liquid extraction apparatus. The combination solid/liquid and liquid/liquid extraction apparatus is designed to maximize efficiency through continuous solvent displacement and comes complete with extractor body, primary condenser, and extraction thimble. We also offer an extractor designed for EPA-priority pollutants in wastewater which extracts, concentrates, and dries the sample. A full line of replacement parts and accessories are available to help streamline projects and increase the functionality of the base chemistry glassware.

KIMBLE® KONTES® Soxhlet extractors and separatory funnels are specially designed for separating an analyte with limited solubility in a particular solvent from an insoluble compound. If you prefer, you can choose the enlarged vapor tube that incorporates an improved design with a protected siphon tube, plus an enlarged vapor tube and sloping seals to prevent the trapping of liquid. Our micro Soxhlet extraction apparatus is best for the continuous extraction of analytics from solid into an organic solvent.

Whether you need a simple or fractional distillation setup, our line of KIMBLE® KONTES® laboratory glassware has what you need — boiling flasks, condensers, distillation columns, adapters, thermometers and more.

For the EPA distillation methods, the MIDI-VAP™ 4000 is a complete distillation system designed to support the semi-automatic colorimetry methods for drinking, ground, surface, saline waters, as well as domestic and industrial wastes. The system features a ten-position heater block, digital controller, automated shut off as well as 10 sets of glassware. Our chemistry glassware includes different types of condensers and distillation apparatus—ammonia nitrogen apparatus, cyanide distillation apparatus, and general distillation apparatus — along with replacement parts to ensure your work continues smoothly and economically.

Cyanide distillation kits are ideal for removing interfering substances in quantitative analysis for cyanide. Component parts are available for the apparatus and to ensure chemical integrity, glass components are manufactured from borosilicate glass.

Filtration assemblies are versatile pieces of chemistry glassware designed to handle small
volumes of liquids for analysis of particulate or microbiological contamination. Our glass
components are manufactured from borosilicate glass and available in a wide selection that includes either stainless steel support for viscous solutions or PTFE-faced fritted glass support that can be used for autoclaving with the filter in place. If you need to filter directly into a media-style bottle, we recommend using the adapter assembly with GL 45 thread. For your convenience, a wide variety of accessories and replacement parts are available.

The ultimate convenience in chemistry glassware? DWK Life Sciences chemistry kits. Each self-contained kit includes a selection of glassware components necessary to perform organic laboratory techniques and environmental chemistry, including a selection for extraction, reflux, reflux with addition, fractionation, and distillation. The Macroscale Kem-Kits® contains fourteen components and a comprehensive instruction manual by Dr. William B. Martin of Lake Forest College. The KIMAX® LABSET™ organic chemistry kit has full-length standard taper 24/40 joints. These general laboratory glassware pieces are manufactured from high-quality 33-expansion borosilicate glass. Designed with your needs in mind, these are available in a rugged polyethylene or our economical corrugated cardboard. Whichever you choose, we’ve sized the kit to fit into lab bench drawers and packed each component in a die-cut foam insert to protect them from damage.

Our flat flange beakers and flat flange round bottom flasks provides pressure and vacuum
resistance to the wall thickness and geometry. Reaction vessels are designed and produced with a precision tolerance flat flange and hemispherical bottom and are perfectly suited to reactions under pressure and or high temperature. Capacities range from 100 mL to 10,000 mL. Our flat flange lids are manufactured from borosilicate glass in a multitude of sizes to fit your requirements.

Our airless-ware reaction flasks provide you with two important things: while they facilitate heating, stirring, and solvent stripping they won’t impair the ease of liquid and solid transfer. Available in a variety of sizes to meet your needs, the bottom of the flask is shaped to fit spherical heating mantels and comes complete with a glass plug.

Frequently Asked Questions

Because our filter products are made of high-quality borosilicate glass, they have a maximum operating temperature of 450°C.

The heating/cooling rate should not exceed 8°C/min. We recommend that when filtering hot substances, you observe the thermal shock resistance and, if necessary, preheat the filtration apparatus in a drying cabinet. Wet filtration apparatus should be heated slowly up to +80°C and dried for one hour before increasing the temperature further.

Glass filters are classified in porosity classes according to their nominal maximum pore size. The porosity is shown either as numbers e.g. 0 to 5 or as letters, for example, EC for extra coarse. Keep in mind, the specified pore sizes relate to the largest pore in the plate. This specification also characterizes the minimum nominal size of particles which may be retained by filtration.

We’ve made it easy. Vessels and lids can be matched using their DN (nominal diameter) number.

Yes, all of our flat flange components are suitable for use under absolute vacuum (-1 bar). Many are also rated for positive pressure operations. Be sure to check the glass surface for damage such as scratches, cracks or nicks, prior to every use. Damaged glassware should not be used due to safety reasons.

Proper care of chemistry glassware is essential. We recommend that it be washed by hand in a soaking bath or by machine in a lab washer. We also suggest that you wash laboratory glassware before it is used for the first time. In addition, lab glassware should be washed immediately after each use at low temperature, on a short cycle, and with low alkalinity.

In principle, a distinction is made between product and reflux condensers. If the condensate is to be discharged as a product, condensers is selected, for example, the Liebig cooler. If, on the other hand, the vapors are to be condensed and returned to the distillation flask, reflux or intensive condenser should be selected. For both types of condensers, in addition to the coolant temperature, the size of the cooling surface is an important consideration because the amount of heat that can be transferred is proportional to the surface area of the cooler. Large cooling surfaces are achieved by special shapes such as cooling spirals.

Glass items with ground components are characterized by a precisely fitting ground surface. Two matching ground components can be easily separated by greasing the ground surface or using a PTFE sleeve. Ideally, if the ground component is used in a high-vacuum application, an appropriate high-vacuum grease should be used.