Heathrow Scientific 0.2mL Microcentrifuge Tubes - HS4423 - DNase/RNase-Free, Pack of 1000

PCR reactions, enzyme dilutions, and other ultra-small volume applications demand tubes with consistent geometry, certified cleanliness, and caps that stay closed under centrifugal force. The Heathrow Scientific HS4423 0.2 mL Microcentrifuge Tube delivers on all three: certified DNase, RNase, and Pyrogen free from lot to lot, rated to 15,000 × g, and fitted with an attached snap cap that opens one-handed and can be pierced directly by a syringe needle without fully opening the tube.

The frosted writing area on the tube body accepts permanent marker labeling without adhesive labels — markings stay readable through centrifugation, freezing, and repeated handling. Fully autoclavable polypropylene. Supplied in a Pack of 1,000 for high-throughput lab consumption at an efficient per-tube cost.

Features and Benefits

• Certified DNase, RNase, and Pyrogen Free: Lot-certified clean for molecular biology applications — eliminates nuclease and endotoxin contamination risk in PCR, qPCR, RNA work, and cell-based assays.

• 15,000 × g Rated: Structural integrity for high-speed micro-centrifuge applications — suitable for protein pelleting, bead-based assays, and column-based purification protocols.

• Attached Snap Cap - One-Handed Operation: Integrated flat cap opens and closes with one hand — maintains consistent sample security during rapid, repetitive tube handling in high-throughput molecular workflows.

• Syringe-Pierceable Cap: Cap can be pierced directly by a syringe needle — minimizes aerosol generation and sample exposure compared to fully opening the tube for each transfer step.

• Frosted Writing Area: Permanent marker-receptive surface directly on the tube body — markings remain legible through centrifugation, freezing, and repeated handling without adhesive labels.

• Autoclavable Polypropylene: Suitable for autoclave sterilization when sterile downstream use requires treated consumables.

• Pack of 1,000: High-count pack designed for laboratory stock programs — reduces reorder frequency and per-tube cost for high-consumption workflows like PCR setup and enzyme dilution series.

Specifications

Heathrow Scientific Microfuge Tube Series

Laboratory Applications

• PCR and qPCR reaction preparation where DNase/RNase-free tubes are required at the 0.2 mL scale for thermal cycler-compatible tube formats

• Enzyme dilution series and reagent aliquoting at sub-microliter volumes where contamination-free certified tubes are essential to prevent false results

• High-speed microcentrifuge pelleting of bead-based assay materials at up to 15,000 × g in a standard benchtop micro-centrifuge

• Antibody and protein storage at the 0.2 mL scale in freezer aliquots where pyrogen-free certification is required for downstream cell culture or in vivo applications

Frequently Asked Questions

Are these tubes compatible with standard thermal cycler block formats?
The HS4423 tubes have standard 0.2 mL conical geometry — however, they are individual tubes with attached caps, not strips or plates. For thermal cycler use, confirm that your cycler accepts individual 0.2 mL tubes (most 0.2 mL blocks do). PCR strips or plates require different formats.

How do the 0.2 mL tubes differ from the 0.5 mL Heathrow Scientific microfuge tubes?
See the tube series comparison table above. Both use the same certification level (DNase/RNase/Pyrogen-free), the same 15,000 × g rating, and the same attached syringe-pierceable snap cap. The 0.2 mL tube (HS4423) is the smaller format for PCR-scale reactions; the 0.5 mL tube (HS4422) holds larger reaction volumes for enzyme assays and sample storage.

Does the frosted writing area work with all permanent markers?
Yes. The frosted polypropylene surface accepts standard laboratory permanent markers including Sharpie® and equivalent brands. Markings are resistant to handling and brief cold storage. For long-term -80°C cryostorage, use cryogenic labels for maximum legibility.

What rack formats hold 0.2 mL tubes?
Standard 0.2 mL tubes fit the 6.5mm wells in the Heathrow Scientific Rota-Rack® (HS29040B) and the 9.3mm wells in the Floating Microtube Rack (HS2166). For water bath or ice incubations with 0.2 mL tubes, the HS2166 floating rack is the recommended holder.

Quality Assurance

Heathrow Scientific HS4423 microcentrifuge tubes are lot-certified DNase-free, RNase-free, and Pyrogen-free. Manufactured from virgin polypropylene and tested to confirm 15,000 × g structural integrity. The frosted writing area is quality-checked for consistent permanent marker adhesion across the full tube body surface.

Academic and Institutional Pricing

LabSupplies.com offers tiered quantity pricing for academic and research institutions. As an authorized dealer, we ship directly from USA inventory.