Borosilicate Beaker

What is the Borosilicate Beaker?

A borosilicate beaker is a wide-mouth cylindrical vessel with a spout for mixing, heating and general handling of liquids. Its graduations are approximate, so it is not used for accurate volume measurement.

Overview

The beaker is made from borosilicate 3.3, typically in low or tall form, with a pour spout and approximate scale graduations that are useful for estimating but not for accurate measurement. Capacities range from 5 mL to 5000 mL, and beakers can be heated on a hotplate or over a flame with a gauze, and are used to prepare solutions, heat samples and hold liquids during work. The wide mouth gives easy access and good visibility, and the flat base makes them stable. Beakers are not designed for accurate volume measurement or for vigorous boiling, where a flask or covered vessel is safer. They tolerate thermal shock better than soda glass but not an open flame applied unevenly, and hydrofluoric acid and hot alkali should be avoided.

How does it work?

Laboratory glassware works because borosilicate 3.3 is chemically inert, transparent and resistant to heat and thermal shock. Its low coefficient of expansion, about 3.3 × 10⁻⁶ per kelvin, means it tolerates rapid temperature change without cracking, and it resists attack by most acids, solvents and reagents, so it does not contaminate samples or react with them. Volumetric glassware carries a calibration mark and is made to defined tolerances: Class A flasks and pipettes hold or deliver a stated volume at 20 °C within a tight limit, while Class B allows a wider tolerance for less critical work. Graduations on cylinders and beakers are approximate. Ground joints and stoppers seal by friction, and standard tapers allow interchange. Because glass is brittle, care is needed with impact and with hydrofluoric acid and hot alkalis, which attack it.

What are the key features?

• Borosilicate 3.3, low or tall form
• Pour spout and approximate graduations
• Capacities 5–5000 mL
• Flat base for stability
• Heatable on hotplate or gauze
• Wide mouth for easy access

What are the technical specifications?

A typical borosilicate beaker configuration offers material of Borosilicate 3.3, capacity range of 5–5000 mL, form of Low or tall, graduation of Approximate, spout of Yes and max temperature of Approx. 500 °C working. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Borosilicate Beaker is used in solution preparation, sample heating, mixing and stirring and general liquid handling. Across the wider Glassware class, laboratories also deploy it for standard and reagent preparation, titration and volumetric analysis and sample mixing and heating.

Which standards and certifications apply?

Relevant standards and methods include ISO 3585 (borosilicate glass 3.3), ISO 1042 (one-mark volumetric flasks), ISO 385 (burettes), ISO 4788 (graduated measuring cylinders), ASTM E438 (glass composition) and USP <660> (glass containers). Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Clean glassware thoroughly, using a detergent suited to the residue and rinsing with reagent water, since residual detergent or acid affects results. Avoid abrasives and strong alkalis that etch glass and remove graduation marks, and never use hydrofluoric acid in glass. Dry volumetric glassware by air or with solvent rather than heat, because heating changes the calibrated volume. Handle ground joints carefully, store stoppers loosely or with a spacer and avoid seizing by keeping joints clean. Check for chips, cracks and star cracks before use, since damaged glassware can fail under vacuum or heat. Keep the calibration certificate and recheck or replace volumetric items that are damaged or of unknown history.

How do I select the right Borosilicate Beaker?

Choose beakers for mixing, heating and holding liquids, and use a flask or volumetric flask when volume accuracy is needed. Confirm capacity and form. RFQ: capacities, form, lid requirement and heating method. Provide capacities and heating method.

How does it compare with other Glassware variants?

Choose the item by function and accuracy. Use Class A volumetric flasks and pipettes where the volume must be accurate, for standards, dilutions and titrations, and Class B or graduated items for approximate work. Select the material for the chemistry: borosilicate 3.3 for general laboratory use, and avoid glass for hydrofluoric acid, hot concentrated alkali and some fluoride-containing reagents, where plastic is safer. Match capacity and neck size to the application, and use narrow-neck flasks for mixing and wide-neck for solids. Check that graduations are legible and durable when buying, and confirm the calibration certificate for volumetric items. Consider whether low-extractable or amber glass is needed for light-sensitive or trace work, and plan cleaning and drying that will not damage the marks.