Iodine Flask (Product Code: SLE/GFL/11) is a stoppered borosilicate glass flask made for the determination of iodine. Its ground joint and stopper let the reaction mixture be closed off while it stands, so volatile iodine is not lost before titration, and its thick, uniform walls stand up to regular handling. Analytical chemistry teachers, pharmacy and food-testing labs and quality-control technicians use it for iodometric work. It is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, for volumetric analysis in teaching and testing laboratories.
| Parameter | Detail |
|---|---|
| Material | Borosilicate glass |
| Wall | Thick, uniform wall thickness |
| Markings | Printed in white enamel |
| Closure | Ground joint with stopper |
| Resistance | Heat resistant and chemical resistant |
| 250 ml capacity | Joint size 24/29 or 29/32 |
| 500 ml capacity | Joint size 24/29 or 29/32 |
| Purpose | Determination of iodine |
In a typical iodometric determination the sample is placed in the flask with potassium iodide and acid, the stopper is seated in the ground joint, and the flask is left to stand — often in the dark — while iodine is liberated. The stopper and neck are then rinsed into the flask and the iodine is titrated with sodium thiosulphate, adding starch indicator near the end point. The same closed-flask routine is used for iodine value of oils and fats, available chlorine in bleaching powder and other classic exercises where students work with iodine solution in the lab.
Choose 250 ml for routine student titrations and 500 ml where the method calls for larger reagent volumes. Both capacities are listed with either a 24/29 or a 29/32 joint, so specify the size that matches any spare stoppers or accessories you already hold. Keep the ground surfaces clean and dry, and never force a stopper that has seized.
The flask is manufactured by Jain Scientific Equipments Private Limited, which sells under the ScienceLab brand from Ambala, Haryana. The company is a registered MSME enterprise (Udyam UDYAM-HR-01-0003714) and ships export orders under Importer-Exporter Code AAECJ8618A issued by the DGFT. More details are on our company profile.
Apparatus and reagents used alongside the iodine flask in an iodometric titration:
Browse all styles in the Glassware Flasks category.
How is an iodine flask different from an ordinary conical flask?
It has a ground joint and stopper, so the mixture can be sealed while iodine is being liberated. An open flask can lose volatile iodine and give a low result.
Is the stopper included?
Yes, the flask is listed with its ground joint and stopper.
Which joint size should I order?
Both 250 ml and 500 ml flasks are listed with 24/29 or 29/32 joints. If you have no existing stoppers to match, either works; just state the joint size clearly on your enquiry.
What if a stopper sticks?
Do not force it. Warm the neck gently with warm water and ease the stopper with a twisting motion; keeping joints clean and dry after use helps prevent seizing.
Is a calibration certificate available?
Documentation depends on the order — please contact us to discuss your requirements before ordering.
Can you supply laboratories abroad?
Yes. We supply institutions and distributors in India and international markets; send the capacity, joint size and quantity for a quotation.
Send your requirement via our contact page or add the iodine flask to your enquiry cart, noting the capacity and joint size for each line.
Last updated: 24 September 2026