PYREX® VISTA™ 250mL Class A Volumetric Flask with Glass Standard Taper Stopper – 70640-250

The PYREX® VISTA™ 250mL Class A Volumetric Flask is a precision borosilicate glass laboratory instrument designed for accurate preparation of standard solutions, sample dilution, pharmaceutical analysis, and chemical testing. Manufactured by Corning, the flask features a long neck with a permanent calibration line, clearly visible blue markings, and a No. 16 standard taper glass stopper. Its Class A volumetric accuracy makes it suitable for laboratory applications requiring reliable fixed-volume measurements. Ideal for pharmaceutical laboratories, diagnostic laboratories, analytical chemistry facilities, research institutions, educational laboratories, and quality control departments. Key Features & Specifications - Brand: PYREX® VISTA™ - Manufacturer: Corning - Product Number: 70640-250 - Supplier Reference: 401491 - Capacity: 250mL - Product Type: Volumetric Laboratory Flask - Accuracy Classification: Class A - Calibration: Single fixed-volume calibration mark - Material: Borosilicate glass - Flask Shape: Volumetric / pear-shaped - Bottom Style: Flat bottom for stable positioning - Neck Style: Long neck for precise liquid-level adjustment - Graduation: Sharp permanent calibration line - Marking Colour: Blue - Stopper Type: Standard taper glass stopper - Stopper Size: No. 16 - Stopper Material: Hollow glass - Stopper Included: Yes - Polyethylene Cap Included: No - Sterility: Non-sterile - Reusable: Yes - Applicable Standards: ASTM E694, ASTM E542 and ASTM E288 - Quantity per Pack: 6 flasks - Quantity per Case: 12 flasks - Applications: Standard solution preparation, sample dilution, pharmaceutical analysis, chemical testing, and laboratory research