Molekula
Iodine prills
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Iodine prills are solid, sublimable crystals of elemental iodine (I₂), primarily used as a disinfectant, antiseptic, and reagent in laboratories, water purification, and chemical synthesis. This high-purity form ensures controlled release and handling. Catalogue details: CAS 7553-56-2, molecular weight 253.81 g/mol, stored at ambient conditions. Classified as Danger (causes skin and serious eye irritation, harmful if swallowed/inhaled).
Molekula supplies Iodine prills at 99.5 - 100.5% purity in 25 g packs, from £42.72 inc. VAT. It is made or sourced to order. Every batch ships with a certificate of analysis, and safety data sheets are available in 4 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
On backorder — expected to ship by 5 December 2026
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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25 g — £35.60 per pack ex VAT · £42.72 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Prilled, greyish violet in colour with a metallic sheen |
| Assay | 99.5 - 100.5% |
| Non-Volatile Matter | ≤0.1% |
| Chloride and Bromide | ≤250ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 (6.1) |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Bluish-black, lustrous solid |
| Odour | Sharp characteristic odor. |
| Melting Point | 113.7 °C |
| Boiling Point | 184.4 °C |
| Density | 4.9 (relative, water = 1) |
| Vapour Pressure | 0.04 kPa at 25 °C |
| log P (octanol/water) | 2.49 |
Source: PubChem CID 807 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 90029772 |
| CAS Number | 7553-56-2 |
| IUPAC Name | molecular iodine |
| EC Number | 231-442-4 |
| Molecular Formula | I2 |
| Molecular Weight | 253.81 |
| Exact Mass | 253.809 |
| SMILES | II |
| InChIKey | PNDPGZBMCMUPRI-UHFFFAOYSA-N |
| InChI | InChI=1S/I2/c1-2 |
| PubChem CID | 807 |
| UN Number | UN3495 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28012000 |
| Tariff Code | 2801200000 |
Safety & GHS
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- H302 + H312 + H332 Harmful if swallowed, in contact with skin or if inhaled
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H372 Causes damage to organs through prolonged or repeated exposure
- H400 Very toxic to aquatic life
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P304+341 IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- Diiodine
- Eranol
- Iode
- iodine
- Iodine crystals
- Iodine sublimed
- Iodio
- Molecular iodine
- Tincture iodine
- Vistarin
Frequently asked questions
What is iodine prills commonly used for?
Iodine prills are primarily used in water purification, as a disinfectant, and in the production of iodized salt, pharmaceuticals, and analytical reagents.
What is the chemical formula and molecular weight of iodine prills?
The chemical formula is I₂, and the molecular weight is 253.81 g/mol.
How should iodine prills be stored?
Store iodine prills in a tightly sealed container at ambient temperature, away from moisture, sunlight, and incompatible substances.
What grades of iodine prills does Molekula supply?
Molekula supplies iodine prills with an assay of 99.5–100.5%, non-volatile matter of ≤0.1% and chloride and bromide of ≤250 ppm, suitable for most applications including water treatment and chemical synthesis.
Can Molekula supply iodine prills in bulk quantities?
Yes, we offer bulk packaging options for iodine prills, including drums and bags, depending on customer requirements.
What documentation comes with an order of iodine prills?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a packing list with batch-specific details.
Where can I buy Iodine prills?
Directly from Molekula, which lists Iodine prills in 25 g packs from £42.72 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
Is Iodine prills dangerous goods for shipping?
Yes. Iodine prills ships as dangerous goods: UN3495, class 8 (6.1), packing group III.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.