Description
Volumetric flask BLAUBRAND® Class A DE-M amber glass is a calibrated laboratory flask intended for accurate preparation and dilution of standard and working solutions. The 25 ml wide-neck design is manufactured from borosilicate glass 3.3 in brown amber glass and fitted with a ground joint NS 12/21 plus polypropylene stopper. Class A tolerance together with DE-M marking enables dependable volumetric measurements in analytical, pharmaceutical, food and environmental laboratories. Supplied by manufacturer Brand with an ISO individual certificate, the flask documents conformity for precision glassware used in quantitative work. Amber glass reduces light exposure for photosensitive reagents and samples during make-up and handling, while the wide neck supports convenient filling, swirling and cleaning. Robust Boro 3.3 material and a chemical-resistant PP stopper provide practical everyday performance for standard preparation, dilution series and other Class A volumetric applications in the modern laboratory.
This article is part of Volumetric flasks, in Volumetric glassware.
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Questions about Vol. flask BLAUBRAND class A DE-M amber, 25 ml, Boro 3.3, NS 12/21, PP-stopper
What is this article?
Vol. flask BLAUBRAND class A DE-M amber, 25 ml, Boro 3.3, NS 12/21, PP-stopper is the article on this page. Luminix Health distributes Brand for laboratory use. It sits in Volumetric flasks, inside Volumetric glassware, in Labware.
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 Volumetric glassware. The sub-category is Volumetric flasks. The catalogue is Labware.
Shelves beside this one are Measuring cylinders, Burettes, Mixing cylinders and Volumetric accessories & certificates.
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.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.

