PYREX® VISTA™ 500mL Class B Volumetric Flask with Polyethylene Snap Cap – 70581-500

The PYREX® VISTA™ 500mL Class B Volumetric Flask is a reusable laboratory glass instrument designed for preparing standard solutions, sample dilution, chemical analysis, and routine volumetric measurements. Manufactured by Corning, the flask features a long neck with a permanent calibration line, a stable flat-bottom design, and a blue polyethylene snap cap for convenient closure. Its Class B accuracy makes it suitable for routine laboratory applications where Class A precision is not required. Ideal for pharmaceutical laboratories, diagnostic laboratories, chemical testing facilities, research institutions, educational laboratories, and quality control departments. Key Features & Specifications - 500mL Capacity: Suitable for preparing laboratory solutions to a defined final volume. - Class B Accuracy: Capacity tolerances are twice those permitted for comparable Class A volumetric glassware. - Single Calibration Line: Sharp, permanent marking for fixed-volume measurement. - Glass Construction: Transparent and reusable laboratory glass. - Polyethylene Snap Cap: Supplied with a blue low-density polyethylene (LDPE) closure. - No. 500 Snap Cap: Heavy-duty neck designed to accommodate the manufacturer's No. 500 snap cap. - Replacement Caps: Compatible replacement closures available in Corning's 7666 series. - Long Neck Design: Facilitates careful adjustment of the liquid meniscus to the calibration mark. - Blue Markings: Large blue lettering and marking area for laboratory identification. - Flat Bottom: Provides stable upright positioning on laboratory work surfaces. - Reusable Construction: Suitable for repeated laboratory use with proper cleaning. - Manufacturer Packaging: Six flasks per pack and twelve flasks per case. Specification Details Brand PYREX® VISTA™ Manufacturer Corning Product Number 70581-500 Previous Catalogue Number 5581-500 Supplier Reference 401491 Product Type Volumetric Laboratory Flask Capacity 500mL Accuracy Classification Class B Capacity Tolerance Twice the equivalent Class A tolerance Calibration Single Fixed-Volume Calibration Mark Flask Material Laboratory Glass Flask Shape Volumetric Bottom Style Flat Bottom Neck Style Long Neck Graduation Single Permanent Calibration Line Marking Colour Blue Cap Type Snap Cap Cap Material Low-Density Polyethylene (LDPE) Cap Colour Blue Snap Cap Number 500 Replacement Cap Series Corning 7666 Snap Cap Included Yes Glass Stopper Included No Reusable Yes Quantity per Pack 6 Pieces Quantity per Case 12 Pieces Applications Standard Solution Preparation, Sample Dilution, Chemical Analysis, Pharmaceutical Testing, Laboratory Research