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. It suits acid-base and redox titrations in college, university, testing and industrial laboratories, and senior school chemistry. As a chemistry lab instruments supplier, Science Lab Supplies quotes it from Ambala, India for institutions, testing laboratories, tender contractors and distributors.

Specifications

Every figure for the Rota-stopcock burette is entered in the table. In short, the borosilicate 3.3 barrel carries white enamel graduations fused onto the glass, subdivided at 0.1 ml over 50 ml and calibrated to deliver at 20 °C, while the PTFE screw key gives needle-valve 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, for example with Phenolphthalein Solution Indicator in acid-base work. 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 through a Borosilicate Filter Funnel, then bleed the tip to remove air. Do not overtighten the key, and loosen it slightly for long storage.

Standard Scope of Supply

A set contains two 50 ml borosilicate burette barrels, two complete PTFE Rota stopcock screw assemblies and one alignment and usage instruction sheet. A burette stand, clamp, funnel and reagents are separate items that can be priced on the same quotation.

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). Analysts can request a price for Rota-stopcock sets on the contact page, add them to a wider list in the enquiry cart, or follow the lab tender page for tender documents.

Frequently Asked Questions

What is a Rota stopcock?
It is a screw-turn PTFE valve. Turning the key opens a needle valve gradually, giving smooth drop-by-drop control without any grease, so the titrant stays clean and the valve does not seize.

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 and standard solution work.

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?
Laboratories, colleges and distributors obtain this burette from Science Lab Supplies in Ambala, Haryana, India, with quotations sent straight to the buyer for single sets or bulk quantities.

Related Burettes and Titration Items

A burette is only one part of a titration station. These items from the Lab Glassware, Glassware Burette and Chemistry Lab ranges add other stopcock styles, clamps, a stand, a receiving flask and storage, so the whole station can be quoted together.

• Borosilicate Glass Burette 50ml — 50 ml Class A barrel with a straight-bore PTFE plug.
• Burette Class-B with PTFE Key Stopcock — Class B burette with amber enamel graduations.
• Burettes Class B — borosilicate burettes with a PTFE needle valve stopcock.
• Burette Clamp Aluminium — die-cast clamp with rubber-sleeved jaws for burettes up to 30 mm.
• Burette Stand With Fisher Clamp — cast iron base, 600 mm steel rod and a double Fisher clamp.
• Borosilicate Conical Flask — conical borosilicate body for swirling the sample.
• Burette Storage Rack — wood and metal rack for up to 12 burettes of up to 20 mm diameter.

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

Last updated: 9 October 2026