Description
Volumetric flask 20 ml class A with batch certificate is a USP-compliant precision vessel fitted with an NS 10/19 ground joint and PE stopper in amber glass. Fabricated from borosilicate glass 3.3, it combines chemical resistance with low thermal expansion for dependable volumetric performance. The amber glass protects light-sensitive media, and white Diffico markings deliver clear readability. Manufactured according to USP requirements, each flask is identified by a batch number and supplied with a batch certificate in the original packaging to confirm class A conformity. Available in packs of 10 pieces from manufacturer Witeg, these flasks are intended for accurate preparation of standard solutions, dilutions and quantitative work in pharmaceutical, analytical and research laboratories. The PE stopper provides a secure, easy-to-handle closure. With a net weight of 0,022 kg, the 20 ml capacity supports small-volume certified measurements that demand light protection and documented USP-aligned accuracy.
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: PE stopper
- Material: Amber borosilicate glass 3.3, USP
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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 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.