{"product_id":"globe-scientific-vial-9030002cap-sc-brw-s","title":"9mm Screw Caps for 2mL Chromatography Vials, Bonded Red PTFE\/White Silicone Septa — 2 Options, 100\/Pack | Globe Scientific","description":"\u003ch2\u003eDiamondPure 9mm Screw Caps for 2mL Chromatography Vials, Open-Top Blue with Bonded Red PTFE\/White Silicone Septa, 100\/Pack\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eDiamondPure Screw Cap for 2mL Chromatography Vial\u003c\/strong\u003e seals standard 9mm-finish autosampler vials for reliable HPLC and GC sample storage. Its open-top design exposes a bonded red PTFE\/white silicone septum, giving clean needle penetration for automated injection while limiting evaporation during overnight sequences.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eScrew cap with bonded septum for 2mL chromatography vials\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\/Size\u003c\/td\u003e\n\u003ctd\u003e9mm finish (fits standard 2mL autosampler vials)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePolypropylene cap; red PTFE \/ white silicone bonded septum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClosure\/Cap\u003c\/td\u003e\n\u003ctd\u003eScrew closure, open-top blue cap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSterility\u003c\/td\u003e\n\u003ctd\u003eNon-sterile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e100 caps per pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eAvailable Options\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e9030002CAP-SC-BRW-S — Bag of 100\u003c\/td\u003e\n\u003ctd\u003e9030002CAP-SC-BRW-S\u003c\/td\u003e\n\u003ctd\u003e$31.20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9030002CAP-SC-BRW — Bag of 100\u003c\/td\u003e\n\u003ctd\u003e9030002CAP-SC-BRW\u003c\/td\u003e\n\u003ctd\u003e$31.20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSealing 2mL autosampler vials for HPLC and UHPLC runs\u003c\/li\u003e\n\u003cli\u003eGC and GC-MS sample preparation and overnight injection sequences\u003c\/li\u003e\n\u003cli\u003eLC-MS\/MS bioanalytical and pharmaceutical assays\u003c\/li\u003e\n\u003cli\u003eEnvironmental sample storage prior to chromatographic analysis\u003c\/li\u003e\n\u003cli\u003eForensic and toxicology screening workflows\u003c\/li\u003e\n\u003cli\u003eStability and dissolution sampling in QC laboratories\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eChemical Resistance\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eAqueous buffers\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDilute acids\u003c\/td\u003e\n\u003ctd\u003eExcellent (PTFE face)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDilute bases\u003c\/td\u003e\n\u003ctd\u003eExcellent (PTFE face)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlcohols\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAcetonitrile\u003c\/td\u003e\n\u003ctd\u003eGood — limit prolonged exposure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAromatic solvents\u003c\/td\u003e\n\u003ctd\u003eGood (PTFE side); silicone backing may swell on repeated contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChlorinated solvents\u003c\/td\u003e\n\u003ctd\u003eGood (PTFE side); avoid extended soaking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003elabsupplies.com is an authorized Globe Scientific dealer shipping from US inventory. Each pack carries lot numbers that support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact our team for volume quotes on standing chromatography supply orders.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhich side of the septum should face the sample?\u003c\/h3\u003e\n\u003cp\u003eOrient the red PTFE layer toward the sample. PTFE offers broad chemical inertness, while the white silicone backing provides resealing and needle-guiding support after injection.\u003c\/p\u003e\n\u003ch3\u003eAre these caps pre-assembled with the septum?\u003c\/h3\u003e\n\u003cp\u003eYes. The septum is bonded into the open-top blue cap, so no separate assembly is required before use on your 2mL vials.\u003c\/p\u003e\n\u003ch3\u003eWhat vial finish do these caps fit?\u003c\/h3\u003e\n\u003cp\u003eThey fit standard 9mm-finish screw-thread 2mL chromatography and autosampler vials commonly used across HPLC and GC platforms.\u003c\/p\u003e\n\u003ch3\u003eCan the septum be re-pierced for multiple injections?\u003c\/h3\u003e\n\u003cp\u003eThe silicone layer offers limited resealing for repeat injections, though we recommend single-puncture use for volatile samples to minimize evaporation and contamination.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"DiamondPure Screw Cap for 2mL Chromatography Vial, 9mm Finish, Open-Top Blue, Bonded Red PTFE\/White Silicone Septa, 100\/Pack\",\n  \"brand\": {\"@type\": \"Brand\", \"name\": \"Globe Scientific\"},\n  \"sku\": [\"9030002CAP-SC-BRW-S\", \"9030002CAP-SC-BRW\"],\n  \"offers\": {\n    \"@type\": \"AggregateOffer\",\n    \"priceCurrency\": \"USD\",\n    \"lowPrice\": \"31.20\",\n    \"highPrice\": \"31.20\",\n    \"offerCount\": 2,\n    \"seller\": {\"@type\": \"Organization\", \"name\": \"labsupplies.com\"}\n  }\n}\n\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\"@type\": \"Question\", \"name\": \"Which side of the septum should face the sample?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Orient the red PTFE layer toward the sample. 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