Description
Volumetric flask 20 ml, class A with batch certificate, features an NS 12/21 ground joint and a PE stopper in amber glass. Fabricated from borosilicate glass 3.3, the flask combines high chemical resistance with the thermal stability needed for accurate volumetric measurements. Amber glass shields light-sensitive media from photodegradation. White Diffico marking provides permanent, high-contrast visibility of the calibration line. Each unit carries a batch number and is accompanied by a batch certificate per original packaging, documenting class A conformity. The PE stopper offers a practical, chemically resistant closure that seats reliably in the joint. Supplied in packs of 10 pieces from manufacturer Witeg, these volumetric flasks are suited to standard solution preparation, titrimetric work and routine analytical procedures in chemical and pharmaceutical laboratories. Net weight is 0,028 kg. Class A accuracy together with batch documentation and light-protective amber glass supports consistent performance in regulated laboratory settings.
This article is part of Volumetric flasks, in Volumetric glassware.
Key features
- Pack size: 10 pc(s)
- Volume: 20 ml
- Accuracy class: A
- Joint size: NS 12/21
- Stopper type: PE stopper
- Material: Borosilicate glass 3.3
- Technical Information Sheet:
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Questions about Volumetric flasks, 20 ml, A, CC, ST 12/21,
What is this article?
Volumetric flasks, 20 ml, A, CC, ST 12/21, is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Fioles jaugées, inside Verrerie volumétrique, in Matériel de laboratoire.
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 Verrerie volumétrique. The sub-category is Fioles jaugées. The catalogue is Matériel de laboratoire.
Shelves beside this one are Éprouvettes graduées, Burettes, Éprouvettes de mélange and Accessoires volumétriques & certificats.
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.
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.