Description
DURAN® volumetric flask, class A, batch certified, is a 100 ml precision vessel for accurate volumetric analysis and standard solution preparation. It features blue graduation for a clearly visible calibration mark and a ground joint size 12/21 for compatible stoppers or closures used in volumetric work. Class A accuracy supports quantitative laboratory tasks where defined volumetric tolerance is essential, while batch certification assists with lot traceability and quality records. The flask is part of the DURAN® laboratory glassware programme from manufacturer DWK Life Sciences and is intended for routine make-up to volume, dilutions and volumetric analysis. Blue graduation improves readability against clear aqueous media commonly handled on the analytical bench. Supplied as 2 pc(s) per pack, the format suits parallel preparations or spare capacity in busy laboratories. Pack weight data indicate 0,300 kg. This configuration with NS 12/21 is appropriate wherever a 100 ml class A volumetric flask with blue graduation and batch certificate is specified.
This article is part of Volumetric flasks, in Volumetric glassware.
Key features
- Pack size: 2 pc(s)
- Brand: DURAN®
- Accuracy class: Class A
- Nominal volume: 100 ml
- Joint size: NS 12/21
- Graduation: Blue
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Questions about DURAN®-volum. flask, class A, batch certif., 100 ml, 12/21, blue graduation
What is this article?
DURAN®-volum. flask, class A, batch certif., 100 ml, 12/21, blue graduation is the article on this page. Luminix Health distributes DWK Life Sciences 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?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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.
How does ordering and shipping work?
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.

