8126–03 L Microplates, PP, Natural — 290-8126-03L | 15/Box | Caplugs® Evergreen

24-Well Microplate Lids, Polypropylene (PP), Natural — 290-8126-03L | 15/Box (105/Case)

Technical Narrative

The Caplugs® Evergreen is a 24-well Polypropylene (PP) microplate lid — the chemical-resistant upgrade from the PS variant (290-8125-01L) for cell culture and assay programs requiring broader solvent compatibility or repeated autoclave sterilization. PP provides significantly better DMSO tolerance than PS — suitable for compound-treated culture plates at DMSO concentrations up to approximately 30%, where PS lids can stress-crack or leach plasticizers under sustained solvent exposure. Natural transparent PP allows visual monitoring of cell confluency and well filling without lid removal.

PP is autoclave-compatible at 121°C with better cycle durability than PS — PP lids maintain their geometry through repeated autoclave cycles without the warping that limits PS lids to fewer sterilization cycles. For virus propagation labs, primary cell culture programs, and any workflow where lids are sterilized between uses rather than used once and discarded, PP provides the preferred combination of chemical resistance, autoclave durability, and transparent monitoring access.

At $77.67 per Box of 15 — $0.7398 per lid — the PP lid delivers the chemical and autoclave performance advantages at the same price point as the PS variant. Choose PP over PS (290-8125-01L) whenever DMSO-containing media, lipophilic compound carriers, or repeated autoclave sterilization are part of the workflow.

Technical Specifications — Caplugs® Evergreen

24-Well PP Lid Workflow Compatibility —

The PP lid provides the same 24-well coverage as the PS variant (290-8125-01L) with broader chemical resistance and autoclave durability for demanding applications:

Autoclave PP lids in a pouch — allow to cool before placing on culture plates. Confirm lid-to-plate fit with a sample pair before bulk purchase.

Chemical Resistance — Polypropylene (PP)

PP provides broader chemical resistance than PS — particularly for DMSO-containing compound plates and repeated autoclave sterilization.

Laboratory Applications

The serves drug discovery cell culture programs running DMSO compound treatment plates; virus propagation labs requiring autoclave-sterilized lids for plaque assay and TCID50 incubation; primary cell culture programs with repeated lid sterilization protocols; organoid culture programs using Matrigel or BME formulations containing organic solvent carriers; and any 24-well cell culture workflow where PS lid solvent resistance or autoclave durability is a documented concern.

U.S. Manufacturing, Quality & Institutional Procurement

Every Caplugs® Evergreen lot is precision-molded at our California manufacturing facility and subject to rigorous dimensional inspection and material purity verification. We supply reference laboratories, hospital systems, biotech firms, and federal procurement offices under institutional pricing programs with blanket-order support and same-day shipping on stocked inventory. Request a sample below to validate before committing to volume.

Frequently Asked Questions — Caplugs® Evergreen

What is the difference between the PP lid and the PS lid (290-8125-01L)?

Both fit standard SBS 24-well plates and are priced identically. The key differences: PP provides broader DMSO tolerance (≤30% vs PS ≤10%), better resistance to lipophilic compound carriers, and greater autoclave cycle durability — PP maintains geometry through repeated 121°C cycles better than PS. PS (290-8125-01L) provides slightly higher optical clarity. Choose PP for DMSO compound plates, organic solvent formulations, and repeated-autoclave workflows. Choose PS for standard aqueous cell culture where DMSO exposure is minimal.

Is the PP lid compatible with repeated autoclave sterilization?

Yes. PP maintains its geometry through multiple autoclave cycles at 121°C / 15 psi better than PS, which can warp under repeated thermal cycling. For labs sterilizing lids between uses — viral work, primary cell culture, contamination-sensitive programs — PP is the preferred lid material. Always allow lids to cool completely before placing on culture plates.

Are the PP lids BPA-free?

Yes. The is molded from virgin Polypropylene (PP) containing no BPA and no phthalate plasticizers.