Description
Burette stopcock in brown borosilicate glass 3.3 is a straight stopcock unit for burettes with a 50 ml capacity and is equipped with a PTFE plug. Brown Boro 3.3 glass helps protect light-sensitive reagents during titration, while the straight stopcock design offers an unobstructed bore for reproducible flow control. The PTFE plug delivers a durable, low-friction seal that resists many laboratory chemicals and supports smooth open–close operation without traditional stopcock grease in routine aqueous work. Offered as one piece from manufacturer Brand, this stopcock serves as a matching spare or replacement for brown glass burettes rated at 50 ml. It is intended for analytical, QC and educational environments that rely on classical volumetric glassware. Installation replaces the existing cock assembly while retaining the burette’s graduation and delivery tip. As a dedicated laboratory shut-off and metering element, it belongs with taper stopcocks and valve fittings used on precision liquid-handling apparatus rather than industrial process valves.
This article is part of Burettes, in Volumetric glassware.
Key features
- Pack size: 1 pc
- Material: Borosilicate glass 3.3, brown
- Stopcock type: Straight stopcock
- Plug material: PTFE
- Burette capacity: 50 ml
- EAN: 4033378252005
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Questions about Burette stopcock straight stopcock, f. bur. cap. 50 ml PTFE-key amber
What is this article?
Burette stopcock straight stopcock, f. bur. cap. 50 ml PTFE-key amber is the article on this page. Luminix Health distributes Brand 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.