General Lab Products & Reviews

The capacity tolerance on this Class A 10 mL PYREX® buret is established by ASTM E-287 and is calibrated in accordance with ASTM E-542. Tips are carefully drawn from accurate bore tubing to insure proper drainage rates. This buret has colored markings, fine, sharp lines and large easy-to-read numbers. The stopcock barrel has a smooth micro-finish to assure leak-resistant performance. Each buret is supplied with a dust cover. A…

These 500 mL PYREX® Kuderna Danish Concentrators are supplied with Keck clamps instead of spring hooks. The complete apparatus consists of a 3-Ball Snyder column (with 24/40 Standard Taper joints), a 500 mL flask (with 24/40 Standard Taper top and 19/22 Standard Taper lower joint), and a graduated 10 mL tube with an outer 19/22 Standard Taper joint. The tube graduations go from 0 to 2 mL in 0.1 mL increments and from 3 mL on i…

This PYREX® general purpose condenser can be used for either distillation or extraction. Although the condensing area per unit length of the 200mm long jacket is low, the large capacity water jacket gives efficient cooling. Condenser tubulations are approximately 10mm O.D. The adapter end is tooled for uniform stopper fit, accommodating a No. 3 rubber stopper.

Translucent polypropylene graduated cylinders are manufactured with raised graduations at the primary scale points. Cylinders have a hexagonal base and are calibrated “to contain” (TC). Tolerances according to ISO 6706. Exposure to temperatures above 60°C may affect accuracy.

These 500 mL PYREX® flat bottom boiling flasks have full length outer 24/40 Standard Taper joints on long necks. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest la…

Translucent polypropylene flasks are manufactured with blue graduations for reference. The flasks have a screw neck and are supplied with a polypropylene cap.

These 500 mL PYREX® wide mouth Erlenmeyer flasks are especially recommended for use as titration flasks and are designed with heavy duty rims to reduce chipping. For convenience, these flasks are graduated in durable white enamel to show the approximate capacity and have an extra large marking spot. They require a No. 10 rubber stopper for sealing. Their uniform wall thickness provides the proper balance between mechanical str…

These 500 mL PYREX® Kjeldahl flasks have tooled finished necks for extra strength and uniform rubber stopper (No. 6) fit. Wall thickness is controlled to offer the optimum balance between thermal shock and chemical resistance. They can be used in ASTM E-258 procedures. Care must be taken to ensure the bottoms of the flasks do not come in contact with the heating elements. Most Kjeldahl equipment manufacturers have ring support…

These 500 mL Class A PYREX® volumetric flasks have machine-blown bodies to which are sealed heavy-beaded, heavy-tubing necks, tooled for No. 500 polyethylene snap-caps. For replacement snap-caps see No. 7666. The graduation line is sharp and permanent. Large white block letters make the inscription easy to read. These Class A volumetric flasks have been manufactured to Class A tolerances as established by ASTM E- 694 for volum…

These 1L Class A PYREX® mixing volumetric flasks have an upper bulb, located between the Standard Taper stopper and the capacity graduation to assist in the mixing of liquids or powders when shaken. This bulb is approximately one-tenth the flask rated capacity of the flask. The strength of these flasks has been increased appreciably through machine-blown bodies to which are sealed heavy-tubing necks tooled for No. 22 Standard…