Product Description
Heat, reflux and evaporate with confidence in a flask built to take repeated thermal cycling and vacuum. The heavy wall gives extra strength against breakage, which matters for rotary evaporation, vacuum distillation and long reactions under heating mantles. It is a dependable everyday flask for synthesis and teaching labs alike.
This listing is for Kimble catalog number 294010-0025: KONTES Single Neck Heavy Wall Round Bottom Flask, 19/22, 25 mL. These single neck round bottom flasks are made from low extractable 33 expansion borosilicate glass meeting USP Type I and ASTM E438, Type I, Class A, and are referenced in ASTM D95. Capacities run from 5 mL to 5000 mL with standard taper joints including 14/20, 19/22, 24/40, 29/26, 29/42, 34/45 and 45/50. LIGHT LABS ships genuine DWK Life Sciences products with knowledgeable support from our Englewood, Colorado team.
Key Features
- Heavy wall – Extra strength for vacuum and heating.
- Standard taper neck – Fits condensers, adapters and stoppers.
- Wide size range – 5 mL to 5000 mL.
- Many joint sizes – From 14/20 to 45/50.
- Type I borosilicate – Low extractable glass.
Specifications
| Catalog Number | 294010-0025 |
| Brand | Kimble (DWK Life Sciences) |
| Description | KONTES Single Neck Heavy Wall Round Bottom Flask, 19/22, 25 mL |
| Sold As | Each |
| Glass | Borosilicate glass 3.3 (33 expansion), low extractable |
| Standards | USP Type I; ASTM E438, Type I, Class A |
| Wall | Heavy wall |
| Necks | Single, standard taper |
| Method reference | ASTM D95 |
Available Options
- 294000-0015 – KONTES Single Neck Heavy Wall Round Bottom Flask, 14/20, 15 mL
- 294000-0025 – KONTES Single Neck Heavy Wall Round Bottom Flask, 14/20, 25 mL
- 294000-0035 – KONTES Single Neck Heavy Wall Round Bottom Flask, 14/20, 35 mL
- 294000-0100 – KONTES Single Neck Heavy Wall Round Bottom Flask, 14/20, 100 mL
- 294010-0005 – KONTES Single Neck Heavy Wall Round Bottom Flask, 19/22, 5 mL
- 294010-0010 – KONTES Single Neck Heavy Wall Round Bottom Flask, 19/22, 10 mL
- 294010-0015 – KONTES Single Neck Heavy Wall Round Bottom Flask, 19/22, 15 mL
- 294010-0050 – KONTES Single Neck Heavy Wall Round Bottom Flask, 19/22, 50 mL
- 294010-0250 – KONTES Single Neck Heavy Wall Round Bottom Flask, 19/22, 250 mL
- 294010-0500 – KONTES Single Neck Heavy Wall Round Bottom Flask, 19/22, 500 mL
- 601000-0124 – KONTES Single Neck Heavy Wall Round Bottom Flask, 24/40, 50 mL
- 601000-0229 – KONTES Single Neck Heavy Wall Round Bottom Flask, 29/42, 100 mL
- 601000-0324 – KONTES Single Neck Heavy Wall Round Bottom Flask, 24/40, 200 mL
- 601000-0424 – KONTES Single Neck Heavy Wall Round Bottom Flask, 24/40, 250 mL
Applications
- Reflux reactions
- Rotary evaporation
- Vacuum distillation
- Water determination per ASTM D95
