MUHWA 1.5ml Microcentrifuge Tubes — 500 PCS, Sterile, DNase/RNase-Free
MUHWA 1.5ml microcentrifuge tubes are precision-molded from virgin, medical-grade polypropylene for reliable performance across a wide range of laboratory applications. With a conical bottom for efficient pellet formation, a secure snap cap for leak-proof closure, and molded graduations for accurate volume measurement, these tubes serve as the workhorse laboratory consumable for sample preparation, storage, and centrifugation. Certified sterile and DNase/RNase-free, each pack contains 500 tubes — an economical bulk supply for high-throughput clinical labs, molecular biology research groups, and university teaching laboratories.
Key Features
- Medical-Grade Polypropylene: Virgin PP resin provides superior chemical resistance to common laboratory reagents including alcohols, weak acids/bases, and organic solvents. Heat-resistant for autoclaving at 121°C and cold-resistant for storage at -80°C without embrittlement.
- Sterile & Certified Contaminant-Free: Each lot is sterilized by gamma irradiation and certified free of detectable DNase, RNase, human genomic DNA, and PCR inhibitors — critical for sensitive molecular biology workflows where contamination compromises results.
- Secure Snap Cap Design: The attached snap cap forms a tight, leak-proof seal that withstands centrifugation up to 18,000 × g, vortex mixing, boiling, and repeated freeze-thaw cycles. The cap is designed for one-handed operation with a textured grip tab.
- Molded Graduations & Writing Surface: Clear volume markings at 0.1ml, 0.5ml, 1.0ml, and 1.5ml enable rapid volume estimation without pipetting. The frosted labeling area accepts permanent marker, ballpoint pen, and solvent-resistant lab markers for durable sample identification.
- Conical Bottom for Pellet Visibility: The conical geometry concentrates precipitated nucleic acids, proteins, or cell pellets at the tube apex for easy visualization and supernatant removal — particularly important in RNA/DNA precipitation and protein pelleting protocols.
- 18,000 xg RCF Rating: Rated for high-speed microcentrifugation, compatible with all standard 24-place, 30-place, and strip-spin rotors accepting 1.5/2.0ml tubes. Suitable for phase separation, pelleting, and spin-column centrifugation workflows.
Technical Specifications
| Parameter | Specification |
| Volume | 1.5 ml (maximum fill volume ~1.7 ml) |
| Material | Virgin medical-grade polypropylene (PP) |
| Cap Type | Attached snap cap with textured grip tab |
| Bottom Shape | Conical |
| Sterility | Sterile (gamma irradiated) |
| Contaminant-Free | DNase-free, RNase-free, human DNA-free, PCR inhibitor-free |
| Max RCF | 18,000 x g |
| Temperature Range | -80degC to 121degC (liquid nitrogen safe for short exposure) |
| Graduations | 0.1 ml, 0.5 ml, 1.0 ml, 1.5 ml (molded) |
| Writing Area | Frosted surface on side wall |
| Pack Size | 500 pieces per pack |
| Color | Natural (translucent) |
| Autoclavable | Yes, 121degC, 15 psi, 20 minutes |
Applications
- Sample Storage: Short-term and long-term storage of biological samples, buffers, enzymes, antibodies, and nucleic acid preparations at temperatures from -80degC to 25degC.
- Centrifugation: Compatible with standard microcentrifuges for cell pelleting, phase separation, nucleic acid precipitation, and spin-column purification protocols.
- PCR Setup: DNase/RNase-free certification makes these tubes ideal for master mix preparation, primer dilution, and sample aliquoting in PCR and qPCR workflows.
- Protein Work: Suitable for protein precipitation, dialysis, enzyme reactions, and immunoprecipitation protocols.
- Teaching Laboratories: Bulk 500-pack provides an economical option for university molecular biology, biochemistry, and microbiology practical courses.
- Clinical Sample Handling: Sterile tubes for aliquoting patient samples, preparing diagnostic reagents, and sample transport.
Frequently Asked Questions
Q: Are these tubes truly DNase/RNase-free?
A: Yes. Each lot is gamma-sterilized and batch-tested for DNase, RNase, human genomic DNA, and PCR inhibitors. Certificate of analysis is available upon request. These tubes are suitable for the most sensitive molecular biology applications including single-cell RNA-seq library preparation.
Q: What is the maximum centrifugation speed?
A: These tubes are rated to 18,000 x g RCF. At maximum speed, we recommend using tube-supporting rotors rather than snap-cap-only rotors to prevent cap deformation. For routine protocols, 13,000-15,000 x g is sufficient for most applications.
Q: Can I autoclave these tubes?
A: Yes. The polypropylene formulation withstands standard autoclave cycles (121degC, 15 psi, 20 minutes). The snap caps should be loosened before autoclaving to prevent pressure differential deformation. For repeated autoclaving, limit to 3-5 cycles as polypropylene gradually becomes more brittle with each heat cycle.
Q: Can these tubes be used in liquid nitrogen?
A: Snap-cap polypropylene tubes can be briefly immersed in liquid nitrogen for flash-freezing, but are not recommended for long-term LN2 storage. For extended cryogenic storage, use screw-cap cryovials specifically designed for vapor-phase liquid nitrogen.
Q: How do these compare with 2.0ml tubes?
A: 1.5ml tubes have the same external diameter as 2.0ml tubes and fit the same rotors. The key difference is maximum fill volume (1.7ml vs 2.2ml). 1.5ml tubes provide better pellet visibility in the conical tip and are preferred for applications where small pellet volumes are critical. The shorter tube body also reduces the risk of cap contact with the rotor lid during centrifugation.
