Eisco Amber Volumetric Flask, 50mL - Class A - Borosilicate Glass, Polyethylene Stopper, 12/21 Socket - QR Code Marking for Calibration Certificate

• CALIBRATION QR CODE ON FLASK || Scan the QR code printed directly on the body of the flask to retrieve a PDF of the calibration batch certificate. Works best if you hold the flask over a solid black background.
• INDUSTRIAL STRENGTH || Made of high quality, heavy duty, borosilicate 3.3 glass. It is microwavable and autoclavable, and can withstand high temperatures and thermal shocks.
• 50mL CAPACITY || Flask has a 50mL capacity and features a single white graduation mark. Class A tolerance, ±0.060mL. Mouth has a 10.8mm inner diameter. Flask size: 2" diameter x 5.75" tall.
• POLYETHYLENE STOPPER || The flask has an NS12/21 size socket fitted with an inert, chemically-resistant polyethylene stopper. This lightweight stopper is durable and flexible, designed to provide a secure seal even after repeated use.
• CLASS A AMBER GLASS || Conforms to ISO 1042 standards. Amber glass protects the contents from UV and blue light, preventing photodegradation and other light-induced reactions.

Volumetric flask made from high-quality borosilicate 3.3 amber glass suitable for holding light sensitive chemicals with a single white graduation marking its 50mL capacity. Features an industry-leading feature: a QR code printed on its surface, allowing you to effortlessly scan and retrieve a PDF of the calibration batch certificate.Class A tolerance at ±0.060mL conforms to ISO 1042 standards for accuracy. The flask is equipped with an NS12/21 size socket fitted with a chemically-resistant polyethylene stopper.

Autoclavable, with superior chemical durability. Low temperature gradient - can withstand high temperatures and thermal shocks. Eisco Labs borosilicate glass has the following heat tolerances: Strain Point 515°C | Annealing Point 565°C | Softening Point 820°C.