PYREX® VISTA™ 50mL Class B Volumetric Flask with Polyethylene Snap Cap – 70581-50

The PYREX® VISTA™ 50mL Class B Volumetric Flask is a precision laboratory glass instrument designed for preparing solutions, sample dilution, chemical analysis, and routine volumetric measurements. Manufactured by Corning from borosilicate glass, the flask features a long neck with a permanent calibration mark, a stable flat bottom, and a blue polyethylene snap cap for convenient closure. Its Class B accuracy makes it suitable for routine laboratory applications where Class A accuracy is not required. Ideal for pharmaceutical laboratories, diagnostic laboratories, research institutions, educational laboratories, chemical testing facilities, and quality control departments. Key Features & Specifications - 50mL Capacity: Suitable for preparing small-volume laboratory solutions to a defined volume. - Class B Accuracy: Capacity tolerance is twice that specified for comparable Class A volumetric flasks. - Borosilicate Glass Construction: Offers chemical resistance and durability for compatible laboratory solutions. - Volumetric Calibration: Features a single sharp, permanent calibration line. - Polyethylene Snap Cap: Supplied with a blue low-density polyethylene (LDPE) closure. - No. 50 Snap Cap: Heavy-duty neck designed to accommodate the manufacturer's No. 50 cap. - Replacement Cap Compatibility: Corning 7666 snap-cap series. - Long Neck Design: Supports careful adjustment of the liquid meniscus to the calibration mark. - Blue Markings: Large blue lettering and marking spot for easy product identification. - Flat Bottom: Allows stable upright positioning on laboratory benches. - Reusable Construction: Suitable for repeated laboratory use with proper cleaning. - Non-Sterile: Supplied without sterilization. - Manufacturer Packaging: Six flasks per pack and twelve flasks per case. Specification Details Brand PYREX® VISTA™ Manufacturer Corning Product Number 70581-50 Previous Catalogue Number 5581-50 Supplier Reference 401491 Product Type Volumetric Laboratory Flask Capacity 50mL Accuracy Classification Class B Accuracy Tolerance Twice the equivalent Class A tolerance Flask Material Borosilicate 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 50 Replacement Cap Series Corning 7666 Snap Cap Included Yes Glass Stopper Included No Sterility Non-Sterile Reusable Yes Quantity per Pack 6 Pieces Quantity per Case 12 Pieces Applications Solution Preparation, Sample Dilution, Chemical Analysis, Pharmaceutical Testing, Laboratory Research