Soluzione tampone pH = 9,26 (20 °C) (di-Sodio tetraborato decaidrato)

- Density: 1,00 g/cm3
- Solub. in water: (20 ºC): miscible
- LD 50 (oral, rat): 2660 mg/kg (pure substance)
- Tariff number: 3822 00 00 00
- Applications: This reference material is intended for the calibration of pH meters and electrodes used for pH measurement or as a control sample for measuring the pH value.

SPECIFICATIONS
pH at 20 ºC: 9,26
specification range: 9,25 - 9,27
uncertainty : ± 0,01
Composition per litre is 3,8 g di-Sodium tetraborate decahydrate tetraborate decahydrate.

Standard buffer solutions are prepared using gravimetric and volumetric procedures. The batch value is determined by measurement with a combination glass electrode against five-point calibration according to DIN 19268. This pH buffer solution is traceable to Standard Reference Material from NIST.
0: 9,43
5: 9,41
10: 9,35
15: 9,30
20: 9,26
25: 9,21
30: 9,16
35: 9,10
40: 9,09
45: 9,07
50: 9,03