Κωδικός: 102069
Volumetric flask, clear glass, borosilicate 3.3, 20 ml, NS 10/19, with hollow glass stopper, blue labelling, class A, pack of 1
All clear volumetric flasks with accuracy class A comply with the DIN EN ISO 1042 standard. They are made of high-quality borosilicate glass 3.3 and calibrated to "In" (20 °C). All volumetric flasks are supplied with suitable stoppers made of glass or PE. Batch-specific certificate of conformity can be supplied on request.
Standard ground joint NS* | Tolerance (± ml) | PK | |
5 | 10/19 | 0.040 | 1 |
10 | 10/19 | 0.040 | 1 |
20 | 10/19 | 0.040 | 1 |
25 | 10/19 | 0.040 | 1 |
50 | 14/23 | 0.100 | 1 |
100 | 14/23 | 0.100 | 1 |
200 | 14/23 | 0.150 | 1 |
250 | 14/23 | 0.150 | 1 |
500 | 19/26 | 0.250 | 1 |
1000 | 24/29 | 0.400 | 1 |
2000 | 29/32 | 0.600 | 1 |
* The first figure relates to the upper diameter of the standard ground joint, while the second figure specifies its length.
Glass compositions :
• Silicon Dioxide (SIO2) – 81% - Hydrolytic resistance at 98 oC – ISO 719
• Boron Oxide (B2O3) – 13% - 121 ºC thermal resistance – ISO 120
• Sodium/ potassium oxide - (Na2O/k2O) – 4% - Acid resistance – DIN 12116
• Aluminum oxide (AI2O3) – 2% - Alkalis resistance – ISO 695
• Hydrolytic resistance at 98 oC – ISO 719
• 121 ºC thermal resistance – ISO 120
• Acid resistance – DIN 12116
• Alkalis resistance – ISO 695
• Linear expansion coefficient – 32,5 x 10-7 ºC.
Κατόπιν Παραγγελίας