PYREX® 250mL Class A Low Actinic Volumetric Flask Only Without Glass Stopper – 55640-250FO

The PYREX® 250mL Class A Low Actinic Volumetric Flask is a precision laboratory glass flask designed for accurate preparation, dilution and measurement of light-sensitive chemical solutions. Manufactured from specially stained low-actinic glass, it helps protect photosensitive reagents while maintaining the chemical resistance, mechanical strength and thermal stability of PYREX® laboratory glassware. Featuring a flat-bottom design, long neck and permanent calibration line, the flask provides Class A volumetric accuracy. It is designed to accommodate a No. 16 standard taper glass stopper, which is sold separately. Suitable for pharmaceutical testing, analytical chemistry, laboratory quality control and scientific research. Key Features & Specifications - Brand: PYREX® by Corning - Product Code: 55640-250FO - Capacity: 250mL - Material: Low Actinic Stained Glass - Flask Type: Volumetric Flask - Accuracy Classification: Class A - Measurement Tolerance: ±0.12mL - Flask Shape: Flat Bottom - Neck Style: Long Neck - Stopper Compatibility: No. 16 Standard Taper Glass Stopper - Stopper Included: No - Replacement Stopper Series: Corning 7650 - Glass Colour: Low Actinic Red - Light Protection: Helps protect light-sensitive laboratory solutions - Graduation: Sharp, permanent calibration line - Markings: Large white lettering for easy identification - Flask Height: Approximately 252mm - Flask Outer Diameter: Approximately 78mm - Construction: Machine-blown glass body with reinforced heavy-tubing neck - Reusable: Yes - Calibration Standards: ASTM E694, ASTM E542 and ASTM E288 - Manufacturer Packaging: 6 Pieces per Pack; 12 Pieces per Case - Applications: Volumetric solution preparation, photosensitive reagent handling, pharmaceutical testing, analytical chemistry and laboratory quality control. Corning +1