The Iwaki PA 6383FS Dropping Funnel with Teflon Stopcock is a laboratory glass dropping funnel from Iwaki, fitted with a stopcock made of Teflon (PTFE). A dropping funnel adds liquids or reagent solutions to a reaction flask gradually and under control, drop by drop. This technique matters a great deal in chemical synthesis, because the rate at which a reagent is added often determines the safety, temperature and selectivity of a reaction, especially when the reaction is exothermic.
The PTFE stopcock is the main advantage of this product. PTFE resists almost all chemicals, including strong acids, bases and organic solvents. The stopcock turns smoothly without grease, so the solution is not contaminated by lubricant and the stopcock does not seize when grease dries out. The funnel body is made of Iwaki borosilicate glass, which resists chemicals and the normal temperature changes found in laboratory work. Because the glass is transparent, chemists can easily watch the remaining volume and the dropping rate during an addition.
In Indonesian laboratories, this dropping funnel suits organic chemistry laboratories at universities, teaching laboratories, R&D units in the pharmaceutical and chemical industries, and quality control laboratories that run stepwise reactions. In these settings, the drop rate must be controlled precisely and the risk of contamination kept low. A greaseless PTFE stopcock combined with a borosilicate glass body makes it a practical choice for both routine and research work.
- Controlled reagent addition in organic synthesis: the stopcock lets chemists add a reagent drop by drop, so the reaction proceeds steadily and the addition rate stays under control.
- Exothermic reaction management: adding reagents slowly and gradually helps keep the reaction temperature in check, which supports safer handling of reactions that release heat.
- Reactions sensitive to contamination: the greaseless PTFE stopcock keeps lubricant out of the reaction mixture, which is important when product purity or later analysis depends on a clean system.
- Work with aggressive reagents: PTFE resists strong acids, bases and organic solvents, so the stopcock stays reliable across a wide range of chemical additions in research and industrial laboratories.
- Teaching and practical sessions at universities: the transparent borosilicate body lets students clearly see the remaining volume and the dropping rate, which helps them learn controlled addition techniques.
| Brand | Iwaki |
|---|---|
| CAS number | — |
| Molecular formula | — |
| Purity | — |
| Category | Funnel (dropping funnel) |
| Pack sizes | — |
| Physical form | — |
| Storage | — |
- Model: PA 6383FS
- Stopcock material: Teflon (PTFE), greaseless operation
- Body material: Iwaki borosilicate glass, transparent
Store the dropping funnel in a clean, dry cabinet or on a padded shelf, away from places where glassware can be knocked over or put under mechanical stress. Keeping it in its original packaging or a dedicated glassware rack helps prevent chips and cracks. Clean the funnel and the PTFE stopcock thoroughly after each use and let them dry completely before storing. Do not lubricate the PTFE stopcock with grease. Check the glass for cracks or chips before every use, and avoid sudden, extreme temperature changes. Handle it with care and wear appropriate personal protective equipment, such as safety glasses and gloves, when working with hazardous reagents.
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