Description
Volumetric flask 25 ml, class A, with NS 12/21 ground joint and hexagonal hollow stopper is a precision measuring vessel manufactured from borosilicate glass 3.3 in Diffico brown finish. Produced to USP requirements and conformity certified, it supports accurate volumetric work where light protection and documented traceability are essential. Every flask is marked with a batch number, and a batch certificate is supplied with each original packaging. The NS hexagonal hollow stopper provides a reliable seal at the joint while the amber-tinted glass helps shield light-sensitive solutions. Suitable for preparing standard solutions, dilutions and analytical samples in pharmaceutical, chemical and quality-control laboratories, the 25 ml capacity fits routine USP-compliant workflows. These flasks from manufacturer Witeg combine durable borosilicate construction with class A volumetric accuracy. Supplied in packs of 10 pieces, they are well suited for regulated environments that require batch documentation and consistent measuring performance for precise laboratory preparations.
This article is part of Volumetric flasks, in Volumetric glassware.
Key features
- Pack size: 10 pc(s)
- Volume: 25 ml
- Accuracy class: A
- Joint size: NS 12/21
- Stopper type: Hexagonal hollow stopper
- Material: Borosilicate glass 3.3
- Technical Information Sheet:
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Questions about Volumetric flask, 25 ml, A, CC, ST 12/21,
What is this article?
Volumetric flask, 25 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.