Molekula
Iodomethane
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
Iodomethane (methyl iodide) is a volatile organic halide widely used as a methylating agent in organic synthesis, pharmaceutical research, and analytical chemistry, including GC derivatization. It is a colorless liquid with a strong, unpleasant odor, highly toxic and flammable. CAS 74-88-4 | Molecular formula CH3I | Molecular weight 141.94 g/mol | Storage at 2–8°C in a cool, well-ventilated area with proper containment. Signal word: Danger (Hazardous to the aquatic environment, toxic if inhaled/swallowed, may cause organ damage). Molekula supplies Iodomethane from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
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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100 g — £55.70 per pack ex VAT · £66.84 inc. VAT
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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.
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Specifications
| Property | Value |
|---|---|
| Appearance | Clear yellow to Colourless transparent liquid |
| Boiling Point | 41 - 43°C |
| Assay | ⩾ 99.0% |
| Stabiliser | Copper |
| Identification (RAMAN) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 32 °C |
| Transport Class | 6.1 |
| Packing Group | I |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Odour | Pungent, ether-like odor. |
| Melting Point | -66.5 °C |
| Boiling Point | 42.5 °C |
| Density | 2.3 (relative, water = 1) |
| Vapour Pressure | 50 kPa at 20 °C |
| Refractive Index | 1.5293 |
| log P (octanol/water) | 1.51 |
Source: PubChem CID 6328 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 42061509 |
| CAS Number | 74-88-4 |
| IUPAC Name | iodomethane |
| EC Number | 200-819-5 |
| Molecular Formula | CH3I |
| Molecular Weight | 141.94 |
| Exact Mass | 141.928 |
| SMILES | CI |
| InChIKey | INQOMBQAUSQDDS-UHFFFAOYSA-N |
| InChI | InChI=1S/CH3I/c1-2/h1H3 |
| PubChem CID | 6328 |
| UN Number | UN2644 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2903.69.9000 |
| Tariff Code | 2903698000 |
Safety & GHS
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Flammable
GHS02
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Toxic
GHS06
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- H226 Flammable liquid and vapour
- H301 + H331 Toxic if swallowed or inhaled
- H312 Harmful in contact with skin
- H335 May cause respiratory irritation
- H350 May cause cancer
- H372 Causes damage to organs through prolonged or repeated exposure
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P201 Obtain special instructions before use
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- 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
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, German, Spanish, French, Italian, Portuguese, Arabic, Dutch.
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
- Iodometano
- Iodure de methyle
- Jod-methan
- Joodmethaan
- Methane, iodo-
- Methyl iodide
- Methyljodid
- Methyljodide
- Metylu jodek
- Monoiodomethane
Frequently asked questions
What is iodomethane (CH3I) commonly used for in research and industry?
Iodomethane is primarily used as an alkylating agent in organic synthesis, including methylations in pharmaceuticals, agrochemicals, and materials science.
What is the molecular formula and molecular weight of iodomethane?
The molecular formula is **CH3I**, and the molecular weight is **141.94 g/mol**.
How should iodomethane be stored?
Store iodomethane at **2–8°C** in a tightly sealed container, protected from light and moisture, under a nitrogen atmosphere if possible.
What grades of iodomethane does Molekula supply?
Molekula supplies **ACS reagent grade** and **high-purity analytical grade** iodomethane, with documentation confirming purity and compliance.
Can Molekula supply iodomethane in bulk quantities?
Yes, we offer bulk quantities of iodomethane, with flexible packaging options (e.g., drums, IBCs) for large-scale applications—contact us for specific requirements.
What documentation comes with an order of iodomethane?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific testing reports** for trace impurities and purity.
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.