DURAN® Volumetric Flask, Class A, without certificate of conformity, 250 mL

with scratched graduation mark and octagonal PE stopper
  • Complies with ISO 1042
  • Made from borosilicate glass 3.3
  • With batch certificate, without certificate of conformity
  • Outstanding precision during volumetric measurement and high-quality process stability
  • Thanks to the exact processing and precisely calibrated scales, they permit the highly accurate determination and measurements of volume
  • Calibration based on the poured in volume (“In”) at a + 20 °C reference temperature
  • The volume content tolerances conform to accuracy Class A
  • Supplied with octagonal polyethylene stopper
  • With scratched graduation mark and white print image
  • Fired-on, highly durable white print
Product Overview
Volumetric flasks are available in two different accuracy Classes: Class A and Class B. The two Classes differ in the accuracy of measurement with Class A being the highest accuracy, and Class B is approximately half that of Class A. The volumetric flasks with accuracy Class A have a blue print for clear glass products and a white print for amber versions. Volumetric flasks with a batch number and accuracy Class A are supplied with a batch certificate. This certificate documents the mean value obtained from measuring the batch in question, the standard deviation and the day of issue. The batch certificates can also be retrieved online. The batch number consists of four digits. The first two numbers specify the production year, and the following two numbers specify the batch, e.g.: 18.01. DURAN® volumetric flasks are used for the accurate measurement of specific quantities of liquids. They are volumetric analysis aids in quantitative laboratory work. These volumetric flasks are certified batchwise but have no certificate of conformity.

Specifications

Specifications
Diameter d (mm) 80
Capacity (mL) 250
Diameter (mm) 80
Neck Size 15.5 +/- 1.5 mm
Marking Area The marking area is a printed ceramic area on laboratory glassware for marking / identification using a wax pencil. Also called marking field, white marking spot or marking square.
Material BORO 3.3, PE
Boro 3.3 Borosilicate glass 3.3 has a very good chemical resistance, virtual inert behavior, a high maximum usage temperature, high light transparency and minimal thermal expansion. Borosilicate glass 3.3 has a linear coefficient of expansion of 3.3 × 10−6 K−1 at
Height (mm) 220
Stopper Size 14/23
Tolerance (mL) +/- 0.15
Autoclavable Yes
Retrace Code This is a lot number printed on the product during the manufacturing process used for identification of the production unit, the production work order and for traceability of the materials used.
Quantity 2
Product Overview
Volumetric flasks are available in two different accuracy Classes: Class A and Class B. The two Classes differ in the accuracy of measurement with Class A being the highest accuracy, and Class B is approximately half that of Class A. The volumetric flasks with accuracy Class A have a blue print for clear glass products and a white print for amber versions. Volumetric flasks with a batch number and accuracy Class A are supplied with a batch certificate. This certificate documents the mean value obtained from measuring the batch in question, the standard deviation and the day of issue. The batch certificates can also be retrieved online. The batch number consists of four digits. The first two numbers specify the production year, and the following two numbers specify the batch, e.g.: 18.01. DURAN® volumetric flasks are used for the accurate measurement of specific quantities of liquids. They are volumetric analysis aids in quantitative laboratory work. These volumetric flasks are certified batchwise but have no certificate of conformity.

Specifications

Specifications
Diameter d (mm) 80
Capacity (mL) 250
Diameter (mm) 80
Neck Size 15.5 +/- 1.5 mm
Marking Area The marking area is a printed ceramic area on laboratory glassware for marking / identification using a wax pencil. Also called marking field, white marking spot or marking square.
Material BORO 3.3, PE
Boro 3.3 Borosilicate glass 3.3 has a very good chemical resistance, virtual inert behavior, a high maximum usage temperature, high light transparency and minimal thermal expansion. Borosilicate glass 3.3 has a linear coefficient of expansion of 3.3 × 10−6 K−1 at
Height (mm) 220
Stopper Size 14/23
Tolerance (mL) +/- 0.15
Autoclavable Yes
Retrace Code This is a lot number printed on the product during the manufacturing process used for identification of the production unit, the production work order and for traceability of the materials used.
Quantity 2

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