Microcentrifuge Tube Racks Singapore: Types & Selection Guide
Microcentrifuge tubes are everywhere in the modern lab — and so are the racks that hold them. A good rack keeps tubes upright, organised, and within reach, protecting your samples from spills, mislabelling, and accidental contamination. Choosing the right rack for each tube size is a small decision that pays off in every single experiment.
At JW RESEARCH SUPPLY, we supply Singapore laboratories with polypropylene, polycarbonate, and floating microcentrifuge tube racks for 1.5 mL, 0.5 mL, and 0.2 mL tubes and PCR strips. This guide covers the types, sizes, and selection criteria you need to equip your bench properly.
Common Tube Sizes and Matching Racks
| Tube Size | Typical Capacity | Rack Formats | Common Use |
|---|---|---|---|
| 1.5 mL / 2.0 mL | 24 - 96 tubes | 4x6, 5x8, 8x12 grids | Sample storage, reactions, centrifugation |
| 0.5 mL | 24 - 48 tubes | 4x6, 4x12 grids | Small reactions, dilutions |
| 0.2 mL PCR tubes | 96 tubes | 8x12 (96-well format) | PCR, qPCR, thermal cycling |
| 0.2 mL 8-tube strips | 12 strips (96 tubes) | Strip-compatible wells | PCR strip handling |
Rack Materials Compared
| Material | Autoclavable | Chemical Resistance | Clarity | Best For |
|---|---|---|---|---|
| Polypropylene (PP) | Yes (121°C) | Excellent | Opaque / translucent | Everyday use, autoclaving, freezer storage |
| Polycarbonate (PC) | Yes (limited cycles) | Good | Excellent (crystal clear) | Visible sample viewing, premium racks |
| Polystyrene (PS) | No | Fair | Excellent | Display, low-cost benchtop use |
| Foam / PE foam | No (some grades) | Good | Opaque | Floating racks for water baths |
Types of Microcentrifuge Tube Racks
- Standard benchtop racks — The everyday grid rack; holds tubes upright for pipetting and storage.
- Floating racks — Buoyant foam racks for water baths; thaw samples or incubate reactions evenly.
- Magnetic racks — Contain magnets that pull magnetic beads to the side of the tubes for bead-based purification workflows.
- Cooling racks — Pre-chilled aluminium blocks keep samples cold during ice-sensitive procedures (e.g. enzyme assays).
- Stackable / interlocking racks — Snap together to save bench space and organise multiple experiments.
- Mini racks — Compact 4-6 tube holders for small benchtop spaces or travel.
Key Selection Criteria
- Match the tube size — A 1.5 mL rack will not grip 0.2 mL tubes securely; buy racks for each tube format you use.
- Consider autoclavability — If you need sterile racks, choose PP or PC and verify the temperature rating.
- Think about freezer use — For -20°C or -80°C storage, choose racks rated for low temperatures; PP is a good default.
- Check bench space — A 96-well PCR rack is compact but a 5x8 1.5 mL rack takes up more room; plan your layout.
- Buy colour-coded sets — Multiple colours help separate experiments, samples, or users at a glance.
Organisation Best Practices
- Label every rack — Use dry-erase markers or adhesive labels with the experiment name and date.
- Colour-code workflows — Assign a colour per project or user to prevent mix-ups.
- Keep a clean bench — Return tubes to racks immediately after use to avoid spills and mislabelling.
- Clean reusable racks — Wash PP racks with detergent, rinse with deionised water, and air-dry; autoclave when sterility is needed.
- Discard damaged racks — Cracked or warped racks no longer grip tubes securely; replace them.
Why Choose JWRESEARCH for Tube Racks in Singapore?
- Complete size range — Racks for 1.5 mL, 0.5 mL, 0.2 mL tubes, PCR strips, and floating formats.
- Quality materials — Medical-grade PP and PC that survive autoclaving and freezer temperatures.
- Bulk pricing — Case packs for busy laboratories and teaching institutions.
- Fast local delivery — Quick dispatch across Singapore so your bench stays organised.
JWRESEARCH supplies benchtop, floating, magnetic, cooling, and stackable tube racks for all common tube sizes to Singapore laboratories, schools, and research institutes. Contact us for quotations and technical advice.
📞 +65 8039 3660 | ✉️ SINGAPORE@JWSHY.COM
🌐 www.jwresearch.cn
Frequently Asked Questions
Q: What sizes of microcentrifuge tube racks do I need?
Most laboratories need racks for three common tube sizes: 1.5 mL / 2.0 mL microcentrifuge tubes (the everyday workhorse), 0.5 mL tubes for small reactions, and 0.2 mL PCR tubes or 8-tube strips. A standard 1.5 mL rack holds 24 to 96 tubes in a 4x6, 5x8, or 8x12 grid; PCR racks typically hold 96 x 0.2 mL tubes in a 96-well format matching thermal cyclers and plate readers. Choose racks that match your workflow and bench space.
Q: Are microcentrifuge tube racks autoclavable?
Polypropylene (PP) racks are autoclavable at 121°C and resist most laboratory chemicals, making them the most common choice. Polycarbonate (PC) racks are also autoclavable but can become brittle over repeated cycles. Polystyrene racks are clear and inexpensive but not autoclavable. Always check the manufacturer's specification — many racks are marked with the temperature rating and whether they tolerate autoclaving. For sterile work, you can autoclave PP racks or wipe them with 70% ethanol.
Q: What is the difference between a floating rack and a benchtop rack?
A benchtop rack stands on the bench and holds tubes upright for everyday pipetting, storage, and organisation. A floating rack (or floater) is designed to float on the surface of a water bath, holding tubes so their contents are heated evenly — essential for thawing samples, incubating reactions, or heat-shocking bacteria. Floating racks are made of buoyant foam or closed-cell polyethylene and come in sizes that hold 1.5 mL, 0.5 mL, and 0.2 mL tubes or PCR strips.
Q: How should I organise microcentrifuge tubes in the lab?
Use colour-coded racks (blue, red, yellow, green) to separate experiments, samples, or users. Label racks with the experiment name and date using dry-erase markers or adhesive labels. Store racks in a dedicated area away from direct sunlight and heat. For long-term freezer storage, use freezer-safe racks and always close the freezer door promptly to minimise temperature fluctuation. Dispose of single-use racks after contamination, and clean reusable PP racks with detergent, rinse, and air-dry.