Beschrijving
Volumetric flask 20 ml class A with batch certificate is a precision laboratory vessel featuring an NS 10/19 ground joint and hexagonal hollow stopper in amber glass. Manufactured from borosilicate glass 3.3, it provides excellent chemical resistance and low thermal expansion for reliable volumetric work. The amber glass protects light-sensitive solutions while white Diffico markings ensure clear, high-contrast readability of the meniscus. Each flask is marked with a batch number and supplied with a batch certificate in the original packaging, confirming class A conformity. Offered in packs of 10 pieces from manufacturer Witeg, these flasks support accurate preparation of standard solutions, dilutions and quantitative assays in analytical, pharmaceutical and research laboratories. The hexagonal hollow stopper delivers a secure seal and stable handling. With a net weight of 0,022 kg, the compact 20 ml capacity is ideal for small-volume certified measurements requiring documented accuracy and light protection.
This article is part of Volumetric flasks, in Volumetric glassware.
Key features
- Pack size: 10 pc(s)
- Capacity: 20 ml
- Accuracy class: A
- Joint size: NS 10/19
- Stopper type: Hexagonal hollow stopper
- Material: Amber borosilicate glass 3.3
- Technical Information Sheet:
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Questions about Volumetric flasks, 20 ml, A, CC, ST 10/19,
What is this article?
Volumetric flasks, 20 ml, A, CC, ST 10/19, is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Maatkolven, inside Volumetrisch glaswerk, in Labmateriaal.
A volumetric flask is calibrated to contain one volume at a reference temperature, with a single mark on a narrow neck. Class A is the tight tolerance. It is not a storage bottle and it is not for heating. The stopper is part of the calibrated article.
Volumetric glassware is glass that has been calibrated to contain or to deliver one stated volume at a reference temperature. That calibration is the whole point. Class A and class AS have a tighter tolerance than class B. A volumetric flask contains. A pipette and a burette deliver. A measuring cylinder is the coarser reading, used when the volume is not the result. The classes sit under ISO laboratory glassware. The chain back to the unit of volume is the work of the BIPM and of NIST.
Which category should I open next?
The category is Volumetrisch glaswerk. The sub-category is Maatkolven. The catalogue is Labmateriaal.
Shelves beside this one are Maatcilinders, Buretten, Mengcilinders and Volumetrische accessoires & certificaten.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.