Product Description
Round bottom flasks with ground joints are the foundation of distillation, reflux and synthesis setups. These KONTES short neck flasks connect directly to condensers, heads and adapters, keeping assemblies compact and stable. They cover everything from small-scale work to multi-liter batches.
This listing is for Kimble catalog number 25277-250: KONTES Round Bottom Short Neck Boiling Flask, 19/22, 250 mL, Case of 12. Each flask is designed to ASTM E1403, Type II, Class III and made from low-extractable, 33 expansion borosilicate glass meeting USP Type I and ASTM E438 Type I, Class A. Joints are 14/20, 19/22 or 24/40 depending on size, and capacities range from 100 mL to 3000 mL. The flasks are referenced in ASTM D322 and ship in cases of 6 or 12. LIGHT LABS supplies the complete DWK Life Sciences line, including Kimble, Wheaton and DURAN labware.
Key Features
- Standard taper joints – 14/20, 19/22 or 24/40 options.
- Short neck – Compact, stable assemblies.
- Round body – Even heating in mantles and baths.
- ASTM E1403 – Type II, Class III design.
- Wide capacity range – 100 to 3000 mL.
Specifications
| Catalog Number | 25277-250 |
| Brand | Kimble (DWK Life Sciences) |
| Description | KONTES Round Bottom Short Neck Boiling Flask, 19/22, 250 mL |
| Sold As | Case of 12 |
| Material | Borosilicate glass, 33 expansion |
| Glass type | USP Type I; ASTM E438 Type I, Class A |
| Standard | ASTM E1403, Type II, Class III |
| Joint | 14/20; 19/22; 24/40 standard taper |
| Neck | Short |
| Method reference | ASTM D322 |
Available Options
- 25276-250 – KONTES Round Bottom Short Neck Boiling Flask, 14/20, 250 mL, Case of 12
- 25285-1000 – KONTES Round Bottom Short Neck Boiling Flask 24/40, 1000 mL, Case of 12
- 25285-2000 – KONTES Round Bottom Short Neck Boiling Flask, 24/40, 2000 mL, Case of 6
- 25285-3000 – KONTES Round Bottom Short Neck Boiling Flask, 24/40, 3000 mL, Case of 6
- 25285-500 – KONTES Round Bottom Short Neck Boiling Flask, 24/40, 500 mL, Case of 12
- 25277-100 – KONTES Round Bottom Short Neck Boiling Flask, 19/22, 100 mL, Case of 12
Applications
- Distillation
- Reflux reactions
- Rotary evaporation
- Organic synthesis
