{"product_id":"caplugs-290-8353-03r-96-well-round-bottom-microplate-pp-natural","title":"0.32 mL Microplates, Round Bottom, PP, Natural — 290-8353-03R | 10\/Box | Caplugs® Evergreen","description":"\u003ch2\u003e96-Well Round (U-Bottom) Microplates, 0.32 mL Well Volume, PP, Natural — 290-8353-03R | 10\/Box (100\/Case)\u003c\/h2\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\"\u003eQuick Reference — 290-8353-03R\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eWell Format\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e96-well SBS\/ANSI\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eBottom\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eRound (U-Bottom)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eWell Volume\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e0.32 mL\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003ePolypropylene (PP)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eNatural\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eDMSO Compat.\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e✓ All concentrations\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eAutoclave\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e✓ Compatible\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003evs PS U-bottom\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003ePP: DMSO + autoclave; PS (290-8117-01R): standard aqueous\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePack Size\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e10\/Box (100\/Case)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e$120.33 \/ Box ($1.2033 \/ plate)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eTechnical Narrative\u003c\/h2\u003e \u003cp\u003eThe Caplugs® Evergreen is a 96-well PP U-bottom microplate — the DMSO-tolerant and autoclave-compatible upgrade from the PS U-bottom (290-8117-01R) for suspension cell culture and agglutination assays involving DMSO compound delivery or requiring autoclave pre-sterilization. PP provides full DMSO compatibility at all concentrations, where PS U-bottom plates can stress-crack under high DMSO compound formulations in drug discovery cell-based assays. The U-bottom geometry allows suspension cells and particles to settle uniformly by gravity for consistent supernatant aspiration and re-suspension across all 96 wells.\u003c\/p\u003e \u003cp\u003ePP is autoclave-compatible at 121°C — enabling pre-sterilization of U-bottom plates for cell culture applications requiring sterile plate supply. PP's broad resistance to alcohols, detergents, and organic solvents makes it the U-bottom format for HAI and agglutination assays using buffer formulations containing organic co-solvents, preservatives, or high-concentration detergents that would stress PS plate geometry.\u003c\/p\u003e \u003cp\u003eAt $120.33 per Box of 10 — $1.2033 per plate — the PP U-bottom carries a modest premium over the PS variant (290-8117-01R, $120.33\/box) justified when DMSO or autoclave requirements are present.\u003c\/p\u003e \u003ch2\u003eTechnical Specifications — Caplugs® Evergreen \u003c\/h2\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eSpecification\u003c\/th\u003e \u003cth\u003eValue\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003ePart Number\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCaplugs Item #\u003c\/td\u003e \u003ctd\u003e290835303RE1\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eWell Format\u003c\/td\u003e \u003ctd\u003e96-well SBS\/ANSI\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eBottom\u003c\/td\u003e \u003ctd\u003eRound (U-Bottom)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eWell Volume\u003c\/td\u003e \u003ctd\u003e0.32 mL\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eMaterial\u003c\/td\u003e \u003ctd\u003ePolypropylene (PP)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eColor\u003c\/td\u003e \u003ctd\u003eNatural\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eDMSO Compat.\u003c\/td\u003e \u003ctd\u003e✓ All concentrations — key PP advantage\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAutoclave\u003c\/td\u003e \u003ctd\u003e✓ Compatible (121°C \/ 15 psi)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003evs PS variant\u003c\/td\u003e \u003ctd\u003e290-8117-01R (PS): standard aqueous; this PP: DMSO + autoclave\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003ePack Size\u003c\/td\u003e \u003ctd\u003e10\/Box (100\/Case)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eBPA\/Phthalate\u003c\/td\u003e \u003ctd\u003eBPA-free; no phthalate plasticizers\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCountry of Origin\u003c\/td\u003e \u003ctd\u003eMade in U.S.A. (California)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003ePP U-Bottom Workflow Compatibility — DMSO \u0026amp; Autoclave Advantage\u003c\/h2\u003e \u003cp\u003ePP U-bottom plates extend round-bottom suspension cell culture and agglutination assays to chemically demanding workflows:\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eApplication\u003c\/th\u003e \u003cth\u003eAssay \/ Use\u003c\/th\u003e \u003cth\u003eNotes\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003eSuspension cell culture (DMSO)\u003c\/td\u003e \u003ctd\u003eLymphocytes, PBMCs in DMSO compound media\u003c\/td\u003e \u003ctd\u003ePP tolerates DMSO; round bottom for uniform cell settling\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eHAI \/ agglutination (harsh media)\u003c\/td\u003e \u003ctd\u003eAgglutination assays with organic-solvent additives\u003c\/td\u003e \u003ctd\u003ePP resists solvents that stress PS at U-bottom well\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCompound-treated suspension\u003c\/td\u003e \u003ctd\u003eDrug treatment of suspension cell lines\u003c\/td\u003e \u003ctd\u003ePP DMSO compatibility + round bottom cell settling\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eBead assay (DMSO matrix)\u003c\/td\u003e \u003ctd\u003eMagnetic bead assay in DMSO-containing buffer\u003c\/td\u003e \u003ctd\u003ePP resists DMSO; round bottom pellets beads\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eHybridoma (autoclave-sterile)\u003c\/td\u003e \u003ctd\u003eHybridoma culture in autoclave-sterilized plates\u003c\/td\u003e \u003ctd\u003ePP autoclave-compatible; round bottom for suspension culture\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCytokine bead array (PP)\u003c\/td\u003e \u003ctd\u003eMultiplex bead FI in DMSO media formulations\u003c\/td\u003e \u003ctd\u003ePP broader DMSO tolerance for compound-treated suspension assays\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eSerial dilution (organic solvent)\u003c\/td\u003e \u003ctd\u003eDilution series with DMSO or alcoholic diluents\u003c\/td\u003e \u003ctd\u003ePP chemical resistance for non-aqueous dilution matrices\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eImmunoprecipitation (DMSO buffer)\u003c\/td\u003e \u003ctd\u003eIP bead assay with DMSO-containing lysis buffer\u003c\/td\u003e \u003ctd\u003ePP resists RIPA\/IP buffers + DMSO co-solvent\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003e\u003cem\u003ePP is translucent — slightly less clear than PS, sufficient for visual cell assessment. For standard aqueous suspension culture and HAI without DMSO, PS U-bottom (290-8117-01R) is the cost-effective choice.\u003c\/em\u003e\u003c\/p\u003e \u003ch2\u003eChemical Resistance — Polypropylene (PP)\u003c\/h2\u003e \u003cp\u003ePP: full DMSO compatibility and autoclave sterilization — key advantages over PS U-bottom.\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eReagent \/ Condition\u003c\/th\u003e \u003cth\u003eCompatibility\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003eDMSO (all concentrations)\u003c\/td\u003e \u003ctd\u003e✓ Excellent — key advantage over PS\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAqueous buffers\u003c\/td\u003e \u003ctd\u003e✓ Excellent\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eShort-chain alcohols\u003c\/td\u003e \u003ctd\u003e✓ Excellent\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eDilute acids \/ alkalies\u003c\/td\u003e \u003ctd\u003e✓ Excellent\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eChloroform \/ hexane (brief)\u003c\/td\u003e \u003ctd\u003e✓ Good\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eDetergents (RIPA, NP-40)\u003c\/td\u003e \u003ctd\u003e✓ Good\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAutoclave (121°C \/ 15 psi)\u003c\/td\u003e \u003ctd\u003e✓ Compatible\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eStorage at -20°C \/ -80°C\u003c\/td\u003e \u003ctd\u003e✓ Suitable\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eLaboratory Applications\u003c\/h2\u003e \u003cp\u003eServes drug discovery suspension cell-based assay programs delivering DMSO compound formulations; immunology labs running HAI assays with chemically complex buffers; hybridoma culture programs requiring autoclave-sterilized plates; cytokine bead array programs in DMSO-containing media; and any U-bottom application where PS DMSO tolerance is a documented limitation.\u003c\/p\u003e \u003ch2\u003eU.S. Manufacturing, Quality \u0026amp; Institutional Procurement\u003c\/h2\u003e \u003cp\u003eEvery 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. \u003ca href=\"#request-sample\"\u003eRequest a sample below\u003c\/a\u003e to validate before committing to volume.\u003c\/p\u003e \u003ch2\u003eFrequently Asked Questions — Caplugs® Evergreen \u003c\/h2\u003e \u003ch3\u003eWhen should I choose PP U-bottom  over PS U-bottom (290-8117-01R)?\u003c\/h3\u003e \u003cp\u003eChoose PP when: (1) DMSO is present at \u0026gt;0.5% working concentration; (2) Autoclave sterilization is required before use; (3) Organic co-solvents, concentrated alcohols, or harsh detergents are in the assay buffer. PS U-bottom (290-8117-01R) is the cost-effective choice for standard aqueous suspension culture, HAI agglutination, and PBMC culture without DMSO.\u003c\/p\u003e \u003ch3\u003eIs the PP U-bottom plate compatible with HAI hemagglutination assays?\u003c\/h3\u003e \u003cp\u003eYes. PP U-bottom plates support the same RBC settling and button-pattern scoring as the PS U-bottom format — the round geometry concentrates RBCs at the well center for clear agglutination vs button distinction. PP is specifically advantageous when the HAI assay buffer includes preservatives, co-solvents, or detergents that would stress PS plate geometry over multiple plate uses.\u003c\/p\u003e \u003ch3\u003eAre the PP U-bottom plates BPA-free and autoclave-compatible?\u003c\/h3\u003e \u003cp\u003eYes to both. Virgin PP, no BPA, no phthalates. Autoclave-compatible at 121°C \/ 15 psi.\u003c\/p\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"96-Well Microplates, Round (U-Bottom), 0.32 mL Well Volume, Non-Sterile, Polypropylene (PP), Natural \\u2014 290-8353-03R | 10\/Box (100\/Case) | Caplugs\\u00ae Evergreen\",\n  \"description\": \"Caplugs\\u00ae Evergreen 290-8353-03R. 96-well U-bottom PP microplate, 0.32 mL, natural, 10\/Box (100\/Case). DMSO-compatible. BPA-free. USA.\",\n  \"sku\": \"290835303RE1\",\n  \"mpn\": \"290-8353-03R\",\n  \"material\": \"Polypropylene (PP)\",\n  \"color\": \"Natural\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Caplugs\\u00ae Evergreen\"\n  },\n  \"manufacturer\": {\n    \"@type\": \"Organization\",\n    \"name\": \"Caplugs\\u00ae Evergreen\",\n    \"address\": {\n      \"@type\": \"PostalAddress\",\n      \"addressCountry\": \"US\",\n      \"addressRegion\": \"CA\"\n    }\n  },\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"price\": \"120.33\",\n    \"priceCurrency\": \"USD\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"itemCondition\": \"https:\/\/schema.org\/NewCondition\",\n    \"seller\": {\n      \"@type\": \"Organization\",\n      \"name\": \"LabSupplies\"\n    }\n  },\n  \"additionalProperty\": [\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Pack Size\",\n      \"value\": \"100 \/ Box\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Sterility\",\n      \"value\": \"Non-Sterile\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Country of Origin\",\n      \"value\": \"United States\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"BPA Free\",\n      \"value\": \"Yes\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Well Format\",\n      \"value\": \"96-well SBS\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Well Volume\",\n      \"value\": \"0.32 mL\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Bottom Geometry\",\n      \"value\": \"Round (U-Bottom)\"\n    }\n  ]\n}\n\u003c\/script\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"When should I choose PP U-bottom (290-8353-03R) over PS U-bottom (290-8117-01R)?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Choose PP when: (1) DMSO is present at \u003e0.5% working concentration; (2) Autoclave sterilization is required before use; (3) Organic co-solvents, concentrated alcohols, or harsh detergents are in the assay buffer. PS U-bottom (290-8117-01R) is the cost-effective choice for standard aqueous suspension culture, HAI agglutination, and PBMC culture without DMSO.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is the PP U-bottom plate compatible with HAI hemagglutination assays?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. PP U-bottom plates support the same RBC settling and button-pattern scoring as the PS U-bottom format \\u2014 the round geometry concentrates RBCs at the well center for clear agglutination vs button distinction. 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