Borosilicate Burette with Rota Stopcock

Product Code : SCL-LG-12004

Borosilicate Burette with Rota Stopcock (SKU SCL-LG-12004) is a 50 ml Class A burette with a PTFE screw-type Rota stopcock that meters titrant drop by drop without stopcock grease. Analytical chemists, quality-control technicians and teachers use it for acid-base and redox titrations in college, university and industrial labs. Science Lab Supplies, a chemistry lab instruments supplier based in Ambala, India, sends it to institutions, testing laboratories, tender contractors and distributors.

Specifications

The barrel is borosilicate 3.3 glass with white graduations fused onto the surface, subdivided at 0.1 ml over the 50 ml range and calibrated to deliver (TD) at 20 °C. Flow is set by turning the PTFE screw key, a needle-valve action that allows single-drop control near the end point.

Applications and Experiments for the Burette with Rota Stopcock

This burette suits titrations where fine control at the end point matters. Because the PTFE key needs no grease, the titrant is not contaminated and the key does not stick, which helps with permanganate, iodine and organic-solvent work.

• Class 11–12 chemistry: volumetric analysis practicals in senior secondary laboratories.
• B.Sc. and M.Sc. chemistry: acid-base, redox and complexometric titrations.
• Pharmacy and food-technology labs: assay titrations and preparation of standard dilutions.
• Industrial quality control: routine titrimetric checks of raw materials and products.

Clamp the burette vertically, close the key fully clockwise, fill above zero, then bleed the tip to remove air. Do not overtighten the key, and loosen it slightly for long storage to relieve the glass housing.

Standard Scope of Supply

According to the product listing, a set contains two 50 ml borosilicate burette barrels, two complete PTFE Rota stopcock screw assemblies and one alignment and usage instruction sheet. The burette stand, clamp, funnel and reagents are not included and can be requested separately.

Packing, MOQ and Lead Time

We quote for a single set for one analyst or for a batch large enough to equip an entire titration laboratory. Every quotation shows packing, delivery time and price for that quantity, and clamps, flasks or other volumetric glassware can be listed alongside.

Science Lab Supplies, which has an Importer-Exporter Code, can ship to buyers in South Africa, Qatar, Sri Lanka, Vietnam, Malaysia and Peru. Science Lab Supplies is registered for GST (GSTIN 06ADEPJ0574F2ZU). Requests go through the contact page or the enquiry cart; tender documents are covered on the lab tender page.

Frequently Asked Questions

What is a Rota stopcock?
It is a screw-turn PTFE valve, often called a Rotaflow-style key. Turning it opens a needle valve gradually, giving smooth drop-by-drop control without any grease.

What accuracy does this burette offer?
It is a 50 ml burette with 0.1 ml subdivisions, calibrated to Class A tolerance and to deliver at 20 °C, making it suitable for quantitative analysis.

Can the burette be autoclaved?
The borosilicate glass barrel can be sterilised up to 140 °C once the PTFE and plastic stopcock parts have been removed. Do not autoclave the stopcock assembly with the barrel.

Who supplies the Borosilicate Burette with Rota Stopcock?
Science Lab Supplies supplies it from Ambala, Haryana, India, and sends quotations straight to laboratories, colleges and distributors for single sets or bulk quantities.

Related Burettes and Titration Items

A burette is only one part of a titration station. The four items below add a clamp to hold it, a receiving flask, and two other burette styles for labs that want a choice of stopcocks, so the whole station can be quoted together.

• Burette Clamp Aluminium — holds the burette upright on a stand.
• Borosilicate Conical Flask — receiving flask for the titration.
• Burette Class-B with PTFE Key Stopcock — Class B burette with a PTFE key.
• Borosilicate Glass Burette 50ml — another 50 ml borosilicate burette in the range.

Browse the full Lab Glassware range or all school lab equipment.

Last updated: 25 September 2026