What size magnetic stir bar should I choose for my flask or beaker?

Match the bar length to roughly the inner diameter of the vessel bottom — a bar that spans about half to two-thirds of the base stirs efficiently without wobbling. These 20mm bars are suitable for smaller flasks and beakers commonly found in Indian labs.

Are these stir bars safe for use with solvents and acids?

Yes, PTFE (Teflon)-coated bars like these BBTCTY stirrers are chemically inert and stand up well to most solvents and acids used in lab work. They are designed for use with a wide range of chemicals without degradation.

How to buy an original BBTCTY magnetic stir bar in India?

Purchase original BBTCTY magnetic stir bars from crowcrowcrow.com, sourced directly from authorized US retailers. Each item is factory-sealed and imported per-order, with all customs duties and GST included in the price. Delivery is via ExpressBox tracked shipping.

What is the temperature range for these PTFE stir bars?

These BBTCTY PTFE magnetic stir bars can withstand a wide operating temperature range, from a low of -196°C up to a high of 250°C, making them versatile for various laboratory experiments.

Can I use these stir bars with a magnetic stirrer hot plate?

Yes, these stir bars are designed to work with magnetic stirrers and magnetic stirrer hot plates. Their magnetic core will couple with the stirrer's motor to create the desired agitation, and the PTFE coating can handle the heat from a hot plate up to 250°C.

BBTCTY 20x40mm 3-Piece Magnetic Stirrer Bars

Name: BBTCTY 20x40mm Olive Shape Magnetic Stirrer Mixer Stir Bars (Pack of 3) - Inert & Non-Toxic Lab Consumables
Brand: BBTCTY
SKU: ksa7590
Price: 2148.00 INR
Availability: InStock

About this item

BBTCTY PTFE magnetic stir bars offer superior performance for laboratory mixing needs. Each pack contains 10 olive-shaped bars, measuring 8mm x 20mm, crafted from Polytetrafluoroethylene (PTFE). These stir bars are designed to be inert, non-toxic, and highly resistant to a wide range of chemicals, solvents, strong acids, and alkalis, making them suitable for demanding lab environments. They maintain their integrity across extreme temperatures, from -196°C to 250°C, and feature excellent lubrication and non-adhesion properties.

The PTFE coating provides exceptional chemical resistance and a low coefficient of friction, ensuring smooth and efficient stirring. Their weather resistance means they remain unchanged with long-term exposure to the atmosphere. These stir bars are non-toxic and possess physiological inertia, making them safe for various scientific applications. The pack of 10 ensures you have replacements or multiple bars for different experiments.

For Indian laboratories, these BBTCTY stir bars provide a reliable and durable solution for chemical agitation. All customs duties and GST are included in the listed price, with delivery via ExpressBox tracked shipping. This ensures you receive authentic, high-quality lab consumables without hidden charges.

Key Features

Size:Diameter 8mm (0.32 inch )* Length 20mm (0.8 inch)
Shape: Olives Shape,Number of Items: 10 pcs,Strong acid and alkali resistance for most chemical solvents
Material PTFE (Polytetrafluoroethylene); Color: pure white,
Low temperature drops to -190 degrees, High temperature up to 250 degrees
Non-toxic,No adhesion,High /Low temperature resistance,Weather resistance

Why choose this product

Superior Lab Performance with PTFE

BBTCTY PTFE magnetic stir bars offer unparalleled chemical inertness and temperature resistance, crucial for accurate scientific work. Unlike some local alternatives that may degrade with harsh solvents or extreme heat, these bars maintain their integrity. Their non-stick surface and low friction coefficient ensure smooth, consistent mixing, preventing sample contamination and ensuring reliable experimental outcomes. This pack of 10 provides excellent value, ensuring you have the right tool for various lab tasks without compromising on quality or safety.

Ideal for Indian Labs, Who Should Consider Alternatives

These 8x20mm olive-shaped PTFE stir bars are perfect for Indian research labs, educational institutions, and quality control departments needing reliable chemical mixing. They are ideal for use with a wide range of solvents and at extreme temperatures. However, if your work involves extremely high-viscosity fluids requiring specialized impeller designs, or if you need stir bars with integrated heating elements (magnetic stirrer hot plates), these passive bars alone would be insufficient. For very large industrial mixing vessels, longer or custom-shaped bars might be necessary.

How to use

Choose a stir bar whose length is about half to two-thirds the diameter of your vessel's base. For 8x20mm bars, this is ideal for smaller flasks or beakers (e.g., 50ml to 250ml). — Select the Right Stir Bar
Carefully place the selected stir bar into the liquid you wish to mix. Ensure it is centered at the bottom of the vessel before placing it on the magnetic stirrer. — Place Stir Bar in Vessel
Place the vessel containing the liquid and stir bar onto the surface of your magnetic stirrer. Ensure the stir bar is centered over the stirrer's rotating magnet. — Position on Magnetic Stirrer
Turn on the magnetic stirrer and gradually increase the speed. The stir bar will begin to rotate, agitating the liquid. Adjust speed for optimal mixing without decoupling. — Adjust Stirring Speed

Example scenarios

Typical situations where BBTCTY PTFE Magnetic Stirrer Mixer Stir Bars Olive Shape 8mm x 20mm helps — illustrative scenarios, not customer reviews.

Scenario 1

Illustrative example

Where it helps

A research lab in Pune needs to mix various solvents for chemical synthesis.

How this product helps

These 8x20mm PTFE stir bars offer excellent resistance to a wide range of solvents, acids, and alkalis, ensuring they won't degrade during critical synthesis steps. The pack of 10 provides ample supply for multiple experiments.

Scenario 2

Illustrative example

Where it helps

An educational institution in Delhi requires reliable stirring for chemistry demonstrations.

How this product helps

The non-toxic and inert nature of these stir bars ensures sample purity and safety during demonstrations. Their clear white color makes them easily visible in various liquids, and the pack of 10 is economical for classroom use.

Specifications

Composition

Coating Material	Polytetrafluoroethylene (PTFE)
Core Material	Magnetic (implied)
Allergens	None
Free From	Adhesion, Toxicity

Usage

Application	Chemical mixing, laboratory agitation
Operating Temperature	-196°C to 250°C
Chemical Resistance	Resistant to most chemicals, solvents, strong acids, alkalis
Cost per use	10 pieces at ₹2,148 — ₹215 per piece
Shelf life after opening	Indefinite (non-consumable)
Contraindications	Not suitable for use without a magnetic stirrer; may not be ideal for extremely high-viscosity fluids without specialized equipment.

How we compare

Feature	BBTCTY PTFE Magnetic	Others
Material & Chemical Resistance	PTFE coated; inert, resists most solvents, acids, alkalis.	Varies by brand; some may use less resistant coatings or materials, potentially degrading with harsh chemicals.
Temperature Range	-196°C to 250°C	Typically -100°C to 200°C; extreme ranges may be less common or less reliable.
Non-Stick & Lubricity	High lubrication, lowest friction, no adhesion.	Standard lubricity; adhesion may occur with certain substances.
Cost per Stirrer (10-pack)	10 pieces at ₹2,148 — ₹215 per piece	Local brands often sell individually or in smaller packs, with prices ranging from ₹150-₹400 per piece depending on size and quality.
Authenticity & Sourcing	Imported from authorized US retailers, factory-sealed.	Locally manufactured or distributed; authenticity is generally standard but sourcing transparency may vary.

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Spec
Price

BBTCTY 20x40mm Olive Shape Magnetic Stirrer Mixer Stir Bars (Pack of 3) - Inert & Non-Toxic Lab Consumables

color: 20X40mm,3pcs

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