The terms “Class A” and “Class B” are commonly used to describe different types of glassware in laboratory settings, particularly for volumetric measuring. These classes have specific standards and tolerances, and they serve different purposes. Here’s the difference between Class A and Class B glassware:

Class A Glassware:

    • Class A glassware is of higher precision and accuracy compared to Class B.
    • It is manufactured to meet stricter tolerances and specifications.
    • Class A glassware is commonly used for analytical work and when precise measurements are required.
    • The volumetric measurements indicated on Class A glassware are more accurate and reliable.
    • It is typically more expensive than Class B glassware due to the higher precision and quality.
    • Class A glassware has the highest level of accuracy out of all the different types of glassware. This type of glassware is manufactured from borosilicate material, which gives it superior properties over other types.
    • Class A borosilicate glassware has superior thermal and chemical resistance properties, which are helpful when working with chemicals common in laboratory experiments.

Class B Glassware:

    • Class B glassware has a lower level of precision and accuracy compared to Class A.
    • It is suitable for general laboratory work and applications where high precision is not crucial.
    • Class B glassware is less expensive than Class A and is more widely used in routine lab tasks.
    • The volumetric measurements indicated on Class B glassware have a slightly higher tolerance, which means the actual volumes may deviate by a small amount.
    • It is sufficient for many common laboratory tasks, such as preparation of solutions and general measurements.
    • Class B glassware is made for more general-purpose use around the laboratory. Class B glassware is typically manufactured from soda-lime glass, which is suitable for most materials but not for long-term chemical holding or exposure. Due to its soda-lime material, Class B glassware isn’t as resistant to chemical and thermal conditions.

Class A and Class B Differences

The main difference between Class A and Class B glassware is their manufacturing materials. Class A is made of strong borosilicate material, while Class B is made from soda-lime material, which makes Class A glassware superior for chemical experiments. Class B glassware is not as accurate as Class A and requires more frequent calibration sessions. However, due to its more multi-purpose use, Class B glassware is a cheaper and more affordable option.

Whether you use Class A or Class B glassware in your laboratory depends on the type of experiments you’ll be performing. Both have their unique applications and properties. The differences between Class A and Class B lab glassware can help you decide which is best for your lab. And if you’re looking for laboratory glassware for sale, check out our selection right here at USA Lab Equipment.


Instrument Section·  HPLC·  GC·  SOR·  Normality·  Normality·  Molarity·  Karl Fischer·  Titration·  Potentiometric Titration·  Uv Document Section

%d bloggers like this: