{"product_id":"assorted-pyrex-5640-25-vwr-89000-400-kimax-28014-25-volumetric-flask-class-a-25-ml-with-stopper-no-9","title":"Assorted PYREX VWR KIMAX Volumetric Flask Class A 25 ml with Stopper No. 9 - Total of 8 Flasks","description":"\u003ch3\u003eAssorted Brand Class A Glass Volumetric Flasks, 25 mL with No. 9 Standard Taper Stoppers (PYREX® \/ VWR® \/ KIMAX®)\u003c\/h3\u003e\n\u003cp\u003eThis Assorted Brand 25 mL Class A Volumetric Flask listing delivers high-precision, laboratory-grade volumetric glassware sourced from leading scientific manufacturers, including Corning® PYREX®, VWR® Collection, and Kimble® KIMAX®. Engineered to meet strict ASTM E288 and ISO 1042 compliance parameters, these Class A flasks are calibrated \"To Contain\" (TC) a precise liquid volume of 25 mL at an ambient temperature baseline of 20°C. Each flask features a heavy-duty, uniform neck profile topped with a ground-glass **No. 9 Standard Taper ($TS$) outer joint** and comes equipped with a matching chemical-resistant glass or high-density polymer pennyhead stopper. Sourced from verified laboratory equipment overstocks and asset liquidations, these assorted Class A components provide exceptional thermal and chemical resistance for critical analytical solution compounding, serial dilutions, and calibration standard preparations.\u003c\/p\u003e\n\u003ch3\u003eTechnical Performance \u0026amp; Material Architecture\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eClass A Volumetric Accuracy: Fabricated to strict metrological tolerances ($\\pm 0.03\\text{ mL}$). The narrow neck design ensures that minimal shifts in fluid volume result in a pronounced meniscus level adjustment against the permanent graduation mark, maximizing pipetting accuracy.\u003c\/li\u003e\n\u003cli\u003eType I Class A Borosilicate Chemistry: Constructed from premium low-expansion borosilicate glass (typically 33 expansion or equivalent). This matrix yields exceptional mechanical strength, a low coefficient of thermal expansion, and near-absolute inertness against aggressive acids, organic solvents, and alkaline wash sequences.\u003c\/li\u003e\n\u003cli\u003eGround Glass No. 9 Interlocking Joint: The mouth features a precision-ground, frosted internal taper that matches a No. 9 standard stopper. This tight glass-to-glass or polymer-to-glass interface provides a hermetic seal that prevents vapor leakage or sample evaporation during vigorous inversion mixing.\u003c\/li\u003e\n\u003cli\u003eHigh-Contrast Graduation \u0026amp; Serialization: Every flask features a sharp, permanent enamel graduation line fired into the glass barrel. Units are labeled with Class A markings, working temperature limits, and regulatory specifications for direct traceability during laboratory data audits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCatalog Identity \/ Mix: Assorted Manufacturer Stock (PYREX® 5640-25, KIMAX® 28014-25, VWR® 89090-674, or exact dimensional equivalents)\u003c\/li\u003e\n\u003cli\u003eVolumetric Capacity: 25 mL Calibration Line\u003c\/li\u003e\n\u003cli\u003eAccuracy Classification: Class A Metrology Standards (Calibrated \"To Contain\" \/ TC at 20°C)\u003c\/li\u003e\n\u003cli\u003eVolumetric Tolerance: $\\pm 0.03\\text{ mL}$ strict variance margin\u003c\/li\u003e\n\u003cli\u003eJoint \u0026amp; Stopper Scale: Standard Taper ($TS$) No. 9 Interlocking Neck\u003c\/li\u003e\n\u003cli\u003eMaterial Profile: Clear Type I, Class A Borosilicate Glass | High-Durability Flat Bottom Profile\u003c\/li\u003e\n\u003cli\u003eStopper Presentation: Included (Assorted matching Pennyhead Glass, Solid Glass, or Polyethylene No. 9 Stopper elements)\u003c\/li\u003e\n\u003cli\u003ePackaging Configuration: Sold individually or in assorted laboratory prep packs (Cleaned, inspected, and securely wrapped for damage-free transit)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Benefits \u0026amp; Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAnalytical Standard Preparation: The standard choice for compounding low-volume calibration standards, stock solutions, and mobile phases for high-performance liquid chromatography (HPLC) or gas chromatography (GC) workflows.\u003c\/li\u003e\n\u003cli\u003eQuantitative Serial Dilutions: Provides the high volumetric accuracy required to dilute concentrated analytes without introducing cumulative geometric volumetric errors into clinical or industrial diagnostic essays.\u003c\/li\u003e\n\u003cli\u003eCorrosive Chemical Staging: The inert borosilicate surface handles aggressive acids and organic reagents (like chloroform or methanol) without leaching ions, preventing sample contamination.\u003c\/li\u003e\n\u003cli\u003e**Economical Laboratory Provisioning:** Ideal for university teaching laboratories, testing facilities, and startup R\u0026amp;D labs seeking premium, certified Class A volumetric glassware at a lower cost than single-brand boxed wholesale lines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003csmall\u003eAll product names, logos, and brands are property of their respective owners. Items supplied will represent one of the named industry-standard brands matching the stated technical parameters.\u003c\/small\u003e\u003c\/p\u003e","brand":"PYREX","offers":[{"title":"Default Title","offer_id":49261930709244,"sku":"10123","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/8463\/5132\/files\/assorted-pyrex-vwr-kimax-volumetric-flask-class-a-25-ml-with-stopper-no-9-total-of-8-flasks-glassware-pyrex-779300.jpg?v=1783549789","url":"https:\/\/lifesciencestrading.com\/products\/assorted-pyrex-5640-25-vwr-89000-400-kimax-28014-25-volumetric-flask-class-a-25-ml-with-stopper-no-9","provider":"Life Sciences Trading","version":"1.0","type":"link"}