PYREX Volumetric Flask 1000 ml With Snap Cap. The strength of these flasks has been increased appreciably through machine-blown bodies, which are sealed heavy-beaded, heavy-tubing necks, tooled for snap cap fit. The graduation line is sharp and permanent; large white block letters make the inscription easy to read. The 500 mL size is test-tube-shaped.

A Pyrex 1000 mL Volumetric Flask is a type of laboratory glassware used to measure precise volumes of liquids. Pyrex is a well-known brand of high-quality, borosilicate glass that is heat-resistant and durable, making it ideal for laboratory settings. The 1000 mL (or 1 liter) volumetric flask is typically used in applications where accurate volume measurements are crucial, such as in chemistry experiments, preparation of solutions, or in the food and beverage industry.

Key Features of a Pyrex Volumetric Flask 1000 mL:

1. High-Quality Borosilicate Glass:
   • Pyrex glass is made from borosilicate, which is known for its excellent resistance to thermal shock, chemical corrosion, and mechanical stress. This makes the flask durable and capable of handling high temperatures without breaking.
2. Precision Measurement:
   • The volumetric flask is calibrated to measure exactly 1000 milliliters (1 liter) of liquid. The flask has a narrow neck and a precise graduation mark that indicates the exact volume when filled to the mark. This allows for accurate and consistent measurements, which is critical in scientific experiments.
3. Shape and Design:
   • The flask typically has a bulbous body and a long neck. The bulb allows for a larger volume of liquid to be contained, while the narrow neck helps ensure precise filling up to the graduation mark.
   • The design ensures that the liquid inside is as evenly distributed as possible and minimizes the chance of errors when measuring the exact volume.
4. Flat Bottom:
   • The flask has a flat bottom, which ensures stability when placed on a flat surface, making it easier to measure liquids accurately or when mixing solutions.
5. Marking and Calibration:
   • The flask will have a single graduation mark on the neck. This is the point where the liquid must be filled to reach exactly 1000 mL. The markings are typically etched or printed to avoid fading over time.
6. Stopper:
   • A glass or plastic stopper is often included with the flask to seal the container. The stopper ensures that the liquid inside doesn’t evaporate or become contaminated, and it may also help mix the solution by inverting the flask.
7. Graduation Accuracy:
   • Volumetric flasks are designed for high accuracy, often with an error margin of only a few milliliters, making them ideal for laboratory and industrial uses.