Product Description
Add liquids smoothly to a closed or inert-atmosphere reaction without pressure building up and stalling the flow. A pressure equalizing side line balances the headspace of funnel and flask, so reagent drips steadily even when the system is sealed under nitrogen or argon.
This listing is for Kimble catalog number 299290-0125: KONTES Graduated Addition Funnel Without Stopper and With PTFE Stopcock, 125 mL., 19/22. Cylindrical funnels have graduations numbered both up and down. Models 299250, 299251 and 634500 use glass stopcock plugs and the rest use PTFE; the 299250 and 299280 series include an 850400 glass hex-head stopper. Capacities run from 10 to 1000 mL with 14/20, 19/22, 24/40 or 29/42 joints, in low extractable borosilicate glass. Order it from LIGHT LABS and keep your lab stocked with genuine DWK Life Sciences products.
Key Features
- Pressure equalizing line – Steady flow in sealed systems.
- Dual-numbered graduations – Read volume added or remaining.
- Glass or PTFE stopcocks – Choose the plug material you prefer.
- Stopper options – Some models include an 850400 hex-head stopper.
- Wide size range – 10 mL to 1000 mL.
Specifications
| Catalog Number | 299290-0125 |
| Brand | Kimble (DWK Life Sciences) |
| Description | KONTES Graduated Addition Funnel Without Stopper and With PTFE Stopcock, 125 mL., 19/22 |
| Sold As | Each |
| Glass | Borosilicate glass 3.3 (33 expansion), low extractable |
| Standards | USP Type I; ASTM E438, Type I, Class A |
| Design | Cylindrical, pressure equalizing |
| Joint sizes | 14/20; 19/22; 24/40; 29/42 |
| Stopcock | Glass or PTFE plug, by model |
| Stopcock bore | 2 mm; 4 mm; 6 mm |
Available Options
- 299250-0050 – KONTES Graduated Addition Funnel With Stopper and Glass Stopcock, 50 mL
- 299251-0010 – KONTES Graduated Addition Funnel Without Stopper and With Glass Stopcock, 10 mL
- 299280-0010 – KONTES Graduated Addition Funnel With Stopper and PTFE Stopcock, 10 mL
- 299280-0050 – KONTES Graduated Addition Funnel With Stopper and PTFE Stopcock, 50 mL
- 299281-0010 – KONTES Graduated Addition Funnel Without Stopper and With PTFE Stopcock, 10 mL
- 299281-0025 – KONTES Graduated Addition Funnel Without Stopper and With PTFE Stopcock, 25 mL
- 299290-0060 – KONTES Graduated Addition Funnel Without Stopper and With PTFE Stopcock, 60 mL, 19/22
- 299290-0250 – KONTES Graduated Addition Funnel Without Stopper and With PTFE Stopcock, 250 mL, 19/22
- 634500-0050 – KONTES Graduated Addition Funnel Without Stopper and With Glass Stopcock, 50 mL
- 634500-0125 – KONTES Graduated Addition Funnel Without Stopper and With Glass Stopcock, 125 mL
- 634500-0250 – KONTES Graduated Addition Funnel Without Stopper and With Glass Stopcock, 250 mL
- 634500-0500 – KONTES Graduated Addition Funnel Without Stopper and With Glass Stopcock, 500 mL
- 634530-0060 – KONTES Graduated Addition Funnel Without Stopper and With PTFE Stopcock, 60 mL, 24/40
- 634530-0125 – KONTES Graduated Addition Funnel Without Stopper and With PTFE Stopcock, 125 mL, 24/40
Applications
- Inert atmosphere reactions
- Dropwise reagent addition
- Grignard and organometallic chemistry
- Organic synthesis
