Molekula
Methyl chloroformate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Methyl chloroformate is a reactive intermediate used primarily in organic synthesis, pharmaceuticals, and agrochemical production for introducing methoxycarbonyl groups. It is also employed in the manufacture of pesticides, dyes, and fine chemicals. This colorless liquid has a pungent odor and requires careful handling due to its hazardous nature. Methyl chloroformate (CAS 79-22-1) has the molecular formula ClCOOCH3 and a molecular weight of 94.50 g/mol. It must be stored between 2 to 8°C in a cool, well-ventilated area with proper containment. The product carries a **Danger** signal word, indicating high toxicity and corrosive properties. Molekula supplies Methyl chloroformate 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Specifications
| Property | Value |
|---|---|
| Appearance | Colourless transparent liquid |
| Assay | >98% |
| Free acid | <0.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Flash Point | 10 °C |
| Transport Class | 6.1 (3,8) |
| Packing Group | I |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Clear liquid |
| Odour | Unpleasant, acrid |
| Melting Point | -61 °C |
| Boiling Point | 71 °C |
| Density | 1.22 (relative, water = 1) |
| Vapour Pressure | 14 kPa at 20 °C |
| Refractive Index | 1.3868 |
Source: PubChem CID 6586 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 16239501 |
| CAS Number | 79-22-1 |
| IUPAC Name | methyl carbonochloridate |
| EC Number | 201-187-3 |
| Molecular Formula | ClCOOCH3 |
| Molecular Weight | 94.50 |
| Exact Mass | 93.9822 |
| SMILES | COC(=O)Cl |
| InChIKey | XMJHPCRAQCTCFT-UHFFFAOYSA-N |
| InChI | InChI=1S/C2H3ClO2/c1-5-2(3)4/h1H3 |
| PubChem CID | 6586 |
| UN Number | UN1238 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2915.90.5050 |
| Tariff Code | 2915909098 |
Safety & GHS
-
Flammable
GHS02
-
Corrosive
GHS05
-
Toxic
GHS06
-
Health Hazard
GHS07
Hazard statements
- H225 Highly flammable liquid and vapour
- H300 + H330 Fatal if swallowed or if inhaled
- H312 Harmful in contact with skin
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+330 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+312 IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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.
Synonyms
- Carbonochloridic acid, methyl ester
- Chlorocarbonic acid methyl ester
- Chloroformiate de methyle
- Chloroformic acid methyl ester
- Formic acid, chloro-, methyl ester
- K-Stoff
- Methoxycarbonyl chloride
- Methyl chlorocarbonate
- Methylchloorformiaat
- Metilcloroformiato
Frequently asked questions
What is methyl chloroformate commonly used for?
Methyl chloroformate is primarily used as an intermediate in organic synthesis, including the production of pharmaceuticals, agrochemicals, and fine chemicals, as well as in the manufacture of dyes and pesticides.
What is the chemical formula and molecular weight of methyl chloroformate?
The chemical formula is **ClCOOCH₃**, and the molecular weight is **94.50 g/mol**.
How should methyl chloroformate be stored?
Store methyl chloroformate at **2–8°C** in a cool, dry place, away from incompatible substances like water, alcohols, and strong oxidizers. Use airtight containers.
What grades or purities of methyl chloroformate does Molekula supply?
Molekula supplies methyl chloroformate in **technical grade** and **high-purity (HPLC grade)** as standard. Custom purities may be available upon request.
Can Molekula supply methyl chloroformate in bulk quantities?
Yes, Molekula can supply methyl chloroformate in bulk, with quantities ranging from kilograms to metric tons, depending on availability and customer requirements.
What documentation comes with an order of methyl chloroformate?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS/SDS)**, and a **packing list**. Additional documentation, such as a **Certificate of Origin**, may be provided upon request.
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