Description
Straight burette stopcock with glass key for 25 ml burettes is a clear-glass laboratory fitting with standard ground joint NS 12,5. Fabricated from borosilicate glass 3.3 under the DURAN® registered trademark, the stopcock provides a straight flow path for controlled dispensing on mid-volume burettes common in titration and volumetric analysis. The integrated glass key and transparent construction permit visual inspection of the key and bore while reagents are handled, supporting careful work with aqueous media and standard solutions. Supplied as one piece, it is suited as a spare or replacement component among burette accessories for teaching laboratories, QC stations, and research setups. From manufacturer Hirschmann, the part aligns with familiar DURAN® borosilicate glassware conventions for clear, chemically resistant stopcocks. Net weight is 0,047 kg, and the compact pack format eases organisation next to related volumetric glass. Facilities that rely on NS 12,5 joints and borosilicate 3.3 assemblies can use this straight glass-key stopcock wherever a durable valve is needed for 25 ml burettes.
This article is part of Burettes, in Volumetric glassware.
Key features
- Pack size: 1 pc(s)
- Storage temperature: +5 - +40°C
- Material: Borosilicate glass 3.3
- Trademark: DURAN®
- Joint size: NS 12,5
- EAN: 4049338018765
- Technical Information Sheet:
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Questions about BURETTE STOPC. STRAIGHT 25 ML, GLASS KEY, CLEAR GLASS
What is this article?
BURETTE STOPC. STRAIGHT 25 ML, GLASS KEY, CLEAR GLASS is the article on this page. Luminix Health distributes Hirschmann for laboratory use. It sits in Burettes, inside Volumetric glassware, in Labware.
A burette delivers a measured volume through a stopcock, which is how a titration is read. Class A and class AS state the tolerance. The stopcock, glass or PTFE, and the volume of the burette are the choices. A dirty bore changes the delivered volume.
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 Burettes. The catalogue is Labware.
Shelves beside this one are Volumetric flasks, Measuring cylinders, Mixing cylinders and Volumetric accessories & certificates.
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.