16 mL Round-Bottom Centrifuge & Test Tubes — Borosilicate Glass, 17 × 100 mm, Natural, 125/Bag (214-2380-030)
These 16 mL round-bottom tubes measure 17 × 100 mm and are manufactured from polypropylene (PP) in a natural (translucent) color, supplied non-sterile in a convenient 125/Bag small-pack format. Open-top and cap-free, they are well suited to a wide range of bench, centrifugation, and organic-solvent workflows where polypropylene's superior chemical resistance over polystyrene is required. Made in USA from FDA-compliant, BPA-free resin under ISO 9001 quality controls, part number 214-2380-030 offers a reliable, cost-effective format for specialty-use standing stock and evaluation quantities.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 214-2380-030 |
| Capacity | 16 mL |
| Dimensions | 17 × 100 mm |
| Geometry | Round Bottom |
| Material | Polypropylene (PP) |
| Color | Natural (Translucent) |
| Closure | Open Top (no cap included) |
| Sterility | Non-Sterile |
| Pack Size | 125/Bag |
| BPA / Phthalate / Latex | BPA-Free, Phthalate-Free, Latex-Free |
| Country of Origin | USA |
Applications
- Organic solvent reactions: Full compatibility with acetonitrile and methanol co-solvent protocols where polystyrene tubes cannot be used
- SPE eluate collection: Positioned directly beneath SPE columns or manifolds to collect ACN and MeOH-based eluates without tube degradation
- Centrifugation: Round-bottom geometry seats correctly in standard 17 × 100 mm centrifuge rotor adapters; PP withstands typical centrifuge forces
- Water bath incubation: Suitable for water bath use up to approximately 80 °C in standard 17 × 100 mm tube racks
- Serial dilution and reagent prep: 16 mL working volume accommodates dilution series and reagent staging in both manual and rack-based workflows
- Colorimetric assays: Natural PP provides adequate optical clarity for direct spectrophotometric reading with a tube or cuvette adapter
- Serum, plasma, and whole-blood handling: Low protein-binding PP surface is suitable for standard clinical matrices
- Culture inoculation: Compatible with microbiological bench work when aseptic technique is applied (tubes are non-sterile as supplied)
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent — inert across pH 2–12 |
| Dilute acids (HCl, H₂SO₄, <10%) | Good — suitable for SPE wash and reaction media |
| Dilute bases (NaOH, <10%) | Excellent — PP preferred over PS for caustic reagents |
| Methanol / acetonitrile (<100%) | Excellent — full organic solvent compatibility |
| Ethanol / IPA (<100%) | Excellent — compatible for extraction and fixation |
| Ethyl acetate | Limited — short-term contact only; avoid prolonged exposure |
| Dichloromethane / chloroform | Not recommended — causes cracking |
| Serum / plasma / whole blood | Excellent — low protein-binding surface |
Quality & Procurement
Made in USA, these Caplugs® Evergreen round-bottom tubes are produced in a U.S. facility operating under ISO 9001 quality management from FDA-compliant, BPA-free, phthalate-free, and latex-free polypropylene resin. LabSupplies.com is an authorized dealer of Caplugs® Evergreen consumables and ships from USA inventory, typically the same business day for stocking items. The 125/Bag pack size is well suited to evaluation, specialty-use standing stock, and labs with moderate consumption of this tube format, with volume pricing available for larger institutional or grant-funded orders.
Frequently Asked Questions
Are these tubes sterile, and can they be used directly for cell culture or microbiological work?
These tubes are supplied non-sterile. They can be used for microbiological or cell culture applications provided appropriate aseptic technique is followed; if a sterile format is required, these tubes would need to be autoclaved prior to use — polypropylene is autoclavable.
Why choose PP over PS for round-bottom tubes in this size?
Polypropylene offers full compatibility with acetonitrile, methanol, ethanol, and IPA, as well as resistance across pH 2–12 — properties that polystyrene cannot match. If your workflow involves organic solvents, SPE eluate collection, or caustic reagents, PP is the preferred material.
Do these tubes come with caps or closures?
No — these are open-top tubes supplied without a cap or closure. If a sealed tube is needed, compatible snap-cap or screw-cap closures for 17 × 100 mm tubes should be sourced separately.
What centrifuge rotor or adapter do these tubes require?
The 17 × 100 mm round-bottom geometry fits standard adapters designed for that tube diameter and length. Confirm that your centrifuge rotor or swing-bucket adapter accommodates 17 mm outer diameter tubes before use.