Micro Burettes Schellbach-PTFE key stopcock, capacity 10ml, Sub. Div. 0.20ml Tolerance ± 0.02ml, class 'A', USP With work Certificate, TD - 20 C.
SKU CH7575
- Description
- 3.3 Boro Glass Specs
- Glassware Sell Sheet
- Precision bore burette with PTFE key stopcock
- Made of high quality, chemical resistant borosilicate 3.3 glass
- Mechanically strong with low temperature gradient
- Individually calibrated to deliver (Ex) at 20 C reference temperature
- Easy to read chemical resistant printed scale
- Self lubricating interchangeable PTFE key stopcock
- Complies with DIN ISO 385 standard
- USP <31> compliant
- Printed with individual alpha numerical serial number
- Includes traceable calibration certificate
- Autoclavable at 121 C
Thermal Properties
| Property | Value |
|---|---|
| Coefficient of Linear Expansion | 32.5 x 10-7 / °C |
| Strain Point | 515°C |
| Annealing Point | 565°C |
| Softening Point | 820°C |
| Specific Heat | 0.2 |
| Thermal Conductivity (Cal/cm³°C/Sec) | 0.0027 |
Chemical Durability
| Contact Chemical | Duration (hours) | Loss in weight (mg/m²) |
|---|---|---|
| Water distilled at 100°C | 6 | 10 |
| Water vapour steam at 121°C | 1 | 75 |
| Acid HCl | 6 | 100 |
| 80% H2SO4 at 130°C | 12 | 140 |
| Alkali -1N solution of Na2CO3 boiling | 6 | 4000 |
| Isotonic infusion Fluids - NaCl (0.85%) at 121°C | 2.5 | 70 |
| Isotonic infusion Fluids - Glucose (5%) at 121°C | 2.5 | 50 |