PYREX® 500mL Class A Low Actinic Volumetric Flask with No. 19 Glass Stopper – 55640-500

The PYREX® 500mL 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 retaining the chemical stability, mechanical strength and thermal resistance of PYREX® laboratory glassware. Featuring a flat-bottom design, long neck, permanent calibration line and No. 19 hollow glass standard taper stopper, it is suitable for pharmaceutical analysis, analytical chemistry, laboratory quality control and scientific research. Key Features & Specifications - Brand: PYREX® by Corning - Product Code: 55640-500 - Capacity: 500mL - Material: Low Actinic Stained Glass - Flask Type: Volumetric Flask - Accuracy Classification: Class A - Measurement Tolerance: ±0.20mL - Flask Shape: Flat Bottom - Neck Style: Long Neck - Stopper Type: Hollow Glass Standard Taper Stopper - Stopper Size: No. 19 - Stopper Included: Yes - Glass Colour: Low Actinic Red/Amber - Light Protection: Helps protect light-sensitive chemical solutions - Graduation: Sharp, permanent calibration line - Markings: Large white lettering for easy identification - Flask Height: Approximately 287mm - Flask Outer Diameter: Approximately 100mm - Construction: Machine-blown glass body with reinforced heavy-tubing neck - Reusable: Yes - Calibration Standards: ASTM E694, ASTM E542 and ASTM E288 - Replacement Stopper Series: Corning 7650 - Manufacturer Packaging: 1 Piece per Pack; 1 Piece per Case - Applications: Volumetric solution preparation, light-sensitive reagent handling, pharmaceutical testing, analytical chemistry and laboratory quality control.