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Iodine (Crystals)
Iodine (Crystals) (Product Code: SCI-541/234) is analytical reagent grade elemental iodine in crystal form, used to prepare iodine solution for starch tests and to demonstrate sublimation and halogen chemistry in school, college and biology laboratories. It is supplied in a 50 g pack with an MSDS, and its grey-black crystals turn directly into violet vapour when gently warmed. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Substance | Iodine, I2 |
| Form | Crystals |
| Grade | Analytical reagent |
| Pack size | 50 g |
| MSDS | Supplied with the pack |
| Shelf life | Shelf life depends on the chemical, its grade and storage conditions; ask us for the expiry date of the batch you are quoted. |
| Product code | SCI-541/234 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is Iodine Used For?
Iodine barely dissolves in water on its own, so for the starch test it is first dissolved in potassium iodide solution to give the familiar brown iodine solution. A drop on bread, potato or a decolourised leaf turns blue-black where starch is present, the basis of food tests and the leaf-starch photosynthesis experiment. Many biology and chemistry departments in India make their own iodine solution for lab use from the crystals in exactly this way.
Gently warming a few crystals in a dry beaker covered with a cold watch glass shows sublimation: violet vapour rises and grey-black crystals form again on the cool glass. Iodine also dissolves in non-polar solvents such as hexane with a violet colour and is titrated with sodium thiosulfate in redox analysis. The vapour irritates eyes and lungs and the solid stains and can burn skin, so sublime it only in a fume cupboard, move crystals with a spatula and keep the bottle tightly closed.
Supplier
Jain Scientific Equipments Private Limited supplies Iodine (Crystals) under the ScienceLab name from Ambala, Haryana. Institutions registering a new vendor can record the supplying company as Jain Scientific Equipments Private Limited, CIN U29309HR2020PTC087597, GSTIN 06AAECJ8618A1ZT. Read about the company on the ScienceLab profile page.
Related Laboratory Equipment
Starch tests, sublimation and titrations with Iodine (Crystals) typically also need:
- Potassium Iodide — dissolves iodine in water to make iodine solution.
- Soluble Starch 100g — gives the blue-black colour that iodine solution detects.
- Watch Glass — a cool surface on which sublimed iodine recrystallises.
- Sodium Thiosulfate — titrant for iodine in redox titrations.
- N - Hekzan — a non-polar solvent that shows iodine’s violet colour.
See the Laboratory Equipment category for other halogen compounds and reagents.
Frequently Asked Questions
How is iodine solution made from Iodine (Crystals)?
Dissolve potassium iodide in a little distilled water first, then add Iodine (Crystals) and stir until they dissolve before diluting to volume. Iodine dissolves poorly in plain water but readily in potassium iodide solution, giving the brown iodine solution used for starch tests.
What does the sublimation of Iodine (Crystals) demonstrate?
Iodine (Crystals) pass directly from solid to violet vapour when warmed and form crystals again on a cold surface, without a visible liquid stage in an ordinary classroom demonstration. This illustrates sublimation and is also a simple way to purify iodine from non-volatile impurities.
Is Iodine (Crystals) hazardous to handle?
Yes. Iodine (Crystals) is harmful if swallowed or inhaled, its vapour irritates the eyes and airways, and the solid stains and can burn skin. Warm it only in a fume cupboard, handle it with a spatula and gloves, and follow the MSDS supplied with the pack.
How should Iodine (Crystals) be stored?
Store Iodine (Crystals) in a tightly closed glass bottle in a cool, dark chemical cabinet, because the crystals slowly sublime and the vapour corrodes metal shelves and fittings. Keep the bottle away from ammonia, reducing agents and powdered metals.
What is the shelf life of Iodine (Crystals)?
Shelf life depends on the chemical, its grade and storage conditions, so no fixed period is quoted for Iodine (Crystals). Ask us for the expiry date of the batch you are quoted, and check that the cap seals well, since iodine is lost by slow sublimation.
Can Iodine (Crystals) be quoted for tenders and vendor registration?
Yes. Iodine (Crystals) is supplied by Jain Scientific Equipments Private Limited, whose CIN and GSTIN are given in the Supplier section for vendor forms. Send the number of 50 g packs and the delivery destination in India or international markets through the contact page.
Request a Quote
Ask for an Iodine (Crystals) quotation by giving the number of 50 g packs and your delivery address on our contact page, or place it in the enquiry cart with potassium iodide and soluble starch for your food-test practicals.
Last updated: 24 September 2026
