PTFE Magnetic Stirring Bar

PTFE Magnetic Stirring Bar for Everyday Lab Mixing

If your lab runs a ptfe magnetic stirrer or a stirring hotplate, you already know this little white bar does most of the quiet work. A ptfe magnetic stirring bar is a small capsule with a strong magnet sealed inside smooth, white PTFE. Drop it into your beaker or flask, switch on the stirrer, and the bar spins — mixing your liquid with no shaft, blades, or motor ever touching the sample.

Because the coating is pure PTFE, the ptfe magnetic stirring bar stands up to almost every chemical in the lab: strong acids, alkalis, and organic solvents. It works from -200°C all the way to 260°C, survives steam autoclaving at 121°C, and its super-smooth surface means nothing sticks to it — and it will not scratch your glassware.

Why Labs Choose PTFE Stir Bars

A good ptfe magnetic stirrer bar is one of those lab items you stop thinking about — until a cheap one cracks, loses its magnet, or contaminates a batch. A quality ptfe magnetic stirring bar simply works, batch after batch. Here is what makes these bars dependable:

1. Chemical resistance you can trust: PTFE is inert to virtually all acids, bases, and solvents, so the ptfe magnetic stir bar never reacts with your sample.
2. Wide temperature range: Safe from -200°C to 260°C — from cold-room work to heated stirring on a hotplate.
3. Autoclavable: Sterilize at 121°C and reuse; the PTFE seal keeps the magnetic core fully protected.
4. Strong, stable coupling: A high-quality permanent magnetic core gives steady, wobble-free spinning even at higher stir speeds.
5. Non-stick, non-scratch: PTFE has the lowest friction of any solid material, so the bar glides quietly and leaves glassware unmarked.
6. Non-toxic and inert: Safe for sensitive work including food, pharma, and biological samples.
7. 6 sizes on one page: Our magnetic stirring bars run from the tiny 3×6 mm micro bar for vials to the 8×35 mm workhorse for 1–2 litre beakers — pick your size from the dropdown above.

Key Safety Advantages

Safety is where a genuine ptfe magnetic stirring bar earns its place in regulated labs:

1. Zero sample contamination: The seamless PTFE seal locks the magnet inside — no metal ever touches your sample, even in strong acids.
2. No sparks, no shedding: Unlike bare metal stirrers, PTFE cannot spark and will not shed particles into your mixture.
3. Sterile on demand: Fully autoclavable at 121°C, so you can sterilize between batches in clinical and pharma work.
4. Gentle on glassware: The low-friction glide means no chipping or scratching, even during long heated runs.
5. Non-toxic by nature: PTFE is physiologically inert — safe for food, pharma, and biological samples.

Sizes and Packing

Choose from 6 sizes of ptfe magnetic stirring bar, stocked in Type B and Type C cylindrical profiles. Every size is sold in a packet of 5 pieces — select your size from the dropdown at the top of this page to see its price.

1. B 3×6 mm — micro bar for vials and micro tubes
2. C 4×10 mm — small vials and cuvettes
3. C 7×25 mm — 100–250 ml beakers
4. B 7×30 mm — 250–500 ml beakers
5. C 8×30 mm — 500 ml–1 L flasks
6. C 8×35 mm — 1–2 L beakers and media bottles

Technical Specifications

The key facts for this ptfe magnetic stirrer bar range, verified against manufacturer data:

Where Labs Across Saudi Arabia Use Them

Our magnetic stir rod range goes into daily work across the Kingdom:

1. University teaching & research labs: use the micro sizes for small-scale reactions.
2. Pharmaceutical QC benches: rely on the mid sizes for dissolution and sample prep.
3. Food & beverage labs: use them for homogenizing test samples.
4. Water-testing labs: pair them with stirring hotplates for heated digestions.

How to Pick the Right Size

Choosing a ptfe magnetic stirring bar is simple — follow these rules:

1. Match the vessel: pick a bar about one-third to one-half the diameter of your vessel’s base — long enough to move the whole volume, short enough to spin freely.
2. Narrow vials: go micro (3×6 or 4×10 mm).
3. 250–500 ml beakers: the 7×25 or 7×30 mm bars are the sweet spot.
4. 1 litre and up: step up to 8×30 or 8×35 mm.
5. When in doubt: the slightly longer ptfe magnetic stir bar usually mixes better.

Precautions & Safety Protocols

Your ptfe magnetic stirring bar is tough, but a few habits keep it — and your results — safe:

1. Inspect the coating: Before use, check the white PTFE for cracks or chips. A damaged bar can expose the metal core — retire it.
2. Respect the 260°C limit: PTFE handles most lab heat, but sustained use above 260°C degrades the coating.
3. Start slow: Ramp up your ptfe magnetic stirrer speed gradually. A bar that rattles or gets thrown is mismatched to the vessel or spinning too fast.
4. Lower, don’t drop: Place the bar gently into glassware to avoid chipping the vessel.
5. Retrieve before pouring: Fish the bar out with a magnetic retriever so it doesn’t end up in waste or the next vessel.
6. Mind the magnet: The core is a strong permanent magnet — keep bars away from pacemakers, magnetic storage media, and sensitive instruments.
7. Clean after harsh chemistry: A quick rinse with distilled water after aggressive reagents keeps the surface perfectly smooth.

Why Buy from AskA Solution

1. Ready stock in Dammam: No waiting on overseas shipments — your stir bars ship fast anywhere in Saudi Arabia.
2. Honest per-packet pricing: Clear SAR prices for all 6 sizes, sold in practical 5-piece packets.
3. Lab people, not just sellers: We help you match bar size to your vessels and stirrers before you buy.
4. Full lab consumable range: Pair your bars with beakers, hotplates, and other daily consumables in one order.

FAQs

1. What is a PTFE magnetic stirring bar?
   It is a small bar with a magnet sealed inside PTFE plastic. Placed in a beaker on a magnetic stirrer, it spins and mixes the liquid — with no motor parts touching your sample.
2. What is the difference between Type B and Type C?
   Both are cylindrical PTFE bars from the same quality line; the letter marks the profile series and the numbers give the size in millimetres (diameter × length). For example, C8×35 means Type C, 8 mm thick and 35 mm long.
3. Which size should I choose?
   Pick a bar roughly one-third to one-half the width of your vessel’s base. Micro sizes (3×6, 4×10 mm) suit vials; 7×25–7×30 mm suit 250–500 ml beakers; 8×30–8×35 mm suit 1–2 litre vessels.
4. Can I autoclave these stir bars?
   Yes. The PTFE coating handles steam sterilization at 121°C, and the sealed magnetic core stays fully protected.
5. Are PTFE stir bars safe with strong acids?
   Yes. PTFE is inert to virtually all acids, alkalis, and organic solvents, so the bar will not react with or contaminate your sample.
6. How are they packed, and what does the price cover?
   Each packet contains 5 pieces of one size. The listed price is per packet, in Saudi Riyals excluding 15% VAT.
7. Do you deliver outside Dammam?
   Yes — we deliver across Saudi Arabia, including Riyadh, Jeddah, Jubail, and Yanbu. Contact us for a quote with delivery.

Get Your Stir Bars

Stock up on dependable magnetic stirring bars for your lab. Choose your size from the dropdown, add packets to your enquiry, and our Dammam team will confirm availability and delivery across Saudi Arabia. For bulk magnetic stir rod orders or institutional quotations, contact AskA Solution directly.