Iodine Crystals — 99.99% Pure Elemental Iodine (I2)

Iodine Crystals — 99.99% Pure Elemental Iodine (I₂)

Elemental iodine (I₂) at 99.99% purity, supplied as solid crystals: irregular blue-black flakes and shards with a metallic lustre. Packed in sealed containers and shipped from Brooklyn, New York.

This listing is for laboratory and industrial use only. It is not a dietary supplement and is not intended for human consumption. For supplement-grade iodine, see our Lugol's Iodine Solution and Nascent Iodine ranges.

Specifications

• Chemical: Iodine, I₂ (CAS 7553-56-2)
• Purity: 99.99%
• Physical form: Solid crystals — irregular flakes and shards
• Appearance: Blue-black to violet-black, metallic lustre
• Packaging: Sealed container
• Sizes: 7.5 g · 15 g · 50 g · 100 g · 250 g · 1000 g
• Documentation: Certificate of Analysis and Safety Data Sheet available on request
• Origin: Produced in the USA

What people use elemental iodine for

• Teaching and analytical chemistry — starch–iodine indicator tests, iodometric titration, thin-layer chromatography staining, and sublimation demonstrations.
• Element collections — a display-quality sample of element 53 for periodic-table sets and sealed ampoules.
• Veterinary and agricultural formulations — as the iodine input in topical preparations made to a known formula.
• Industrial and research applications — as a reagent or catalyst input.

Handling and storage

Iodine is a reactive halogen and sublimes at room temperature — it passes straight from solid to vapour, and that vapour is corrosive and irritating. Handle in a well-ventilated area or a fume hood, wearing nitrile gloves and eye protection. It stains skin, fabric and most surfaces on contact. Store sealed, cool, dark and dry, away from heat, metals, ammonia and reducing agents. Read the Safety Data Sheet in full before opening.

Regulatory notice

Iodine at concentrations above 2.2% is a List I chemical under 21 CFR Part 1310. All sales are recorded, there is no minimum-quantity exemption, and orders may be limited or declined at our discretion. Purchasers are responsible for compliance with federal, state and local law.

Frequently asked questions

Are these iodine crystals or iodine prills?

Crystals. This is crystalline elemental iodine in its natural flake and shard form, not prilled spheres. If your procedure calls for "iodine crystals," "resublimed iodine" or "elemental iodine," this is what you want.

What purity is it, and can I get documentation?

99.99%. A Certificate of Analysis and Safety Data Sheet are available on request — contact us with your order number, or before ordering if your application needs the specifications up front.

Is this the same iodine as your Lugol's Solution?

It is the same element, but not the same product. Our Lugol's Solution and Nascent Iodine products are supplement-grade liquids, formulated and labelled for that purpose. This listing is unformulated elemental iodine for laboratory and industrial use only.

How much can I order?

Sizes run from 7.5 g to 1 kg. Because iodine above 2.2% is federally regulated, we record all sales and may limit or decline orders.

How should I store it once it arrives?

Keep it in the sealed container it ships in. Iodine sublimes at room temperature, so a loosely closed container will lose material and stain everything near it. Cool, dark and dry — and never in a metal container.