Class A volumetric accuracy for repeatable solution concentrations, certified batch by batch:

• Class A borosilicate glass flasks manufactured to ISO 1042 for accurate, reproducible solution preparation
• Permanent etched graduation line on the narrow neck reduces meniscus reading error, calibrated to contain (TC) at 20°C
• Ground glass neck joint with plastic stopper gives a close-fitting seal that limits solvent evaporation during storage or mixing
• Borosilicate glass withstands thermal shock and resists acids, neutral solutions and most chemical reagents
• Stable base to height ratio for secure positioning on the bench
• Supplied with batch certification
• Pack of two

Where a measuring cylinder gives an approximate reading, a Class A volumetric flask is made to prepare one exact volume of solution at 20°C. These borosilicate glass flasks are manufactured to ISO 1042 for laboratories that need accurate solution concentrations and reproducible results, and every pack is supplied with batch certification.

A sharp, permanent graduation line is etched onto the narrow neck, which keeps the meniscus easy to read and reduces reading error. The flask is calibrated to contain (TC) at the standard laboratory reference temperature of 20°C. The stable base to height ratio keeps it upright and secure on the bench while you fill and adjust to the line.

The ground glass neck joint and plastic stopper form a close-fitting seal that limits solvent evaporation during storage or mixing. Borosilicate glass withstands thermal shock and resists acids, neutral solutions and most chemical reagents.

Each pack contains two flasks. For other glassware for the laboratory, see our laboratory glassware range.