Description
Volumetric flask 20 ml class A with batch certificate is a precision laboratory vessel for accurate volumetric work in analytical chemistry. It features an NS 7/16 ground joint and a hexagonal hollow stopper that provides secure closure and convenient handling during preparation of standard solutions and dilutions. Manufactured from borosilicate glass 3.3 in Diffico brown, the flask combines high chemical resistance with reduced light transmission, protecting light-sensitive contents. Every flask carries a batch number, and a batch certificate is supplied with each original packaging to document class A conformity. The 20 ml nominal capacity suits small-volume quantitative analysis, titrations and calibration tasks where tight volumetric tolerances are required. Net weight is 0,019 kg, yielding a lightweight yet durable instrument for daily laboratory use. These flasks from manufacturer Witeg are well suited to pharmaceutical, chemical, environmental and research laboratories that need certified accuracy and consistent batch documentation. The brown Diffico finish further supports reliable handling and short-term storage of photosensitive reagents while maintaining the mechanical strength of borosilicate 3.3 glassware.
This article is part of Volumetric flasks, in Volumetric glassware.
Key features
- Pack size: 10 pc(s)
- Capacity: 20 ml
- Accuracy class: Class A
- Ground joint: NS 7/16
- Stopper: Hexagonal hollow stopper
- Material: Borosilicate glass 3.3
- Technical Information Sheet:
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Questions about Volumetric flasks, 20 ml, A, CC, ST 7/16,
What is this article?
Volumetric flasks, 20 ml, A, CC, ST 7/16, 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.
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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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.