Molekula
Methyl oxalyl chloride
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 oxalyl chloride is an acyl chloride derivative used primarily in organic synthesis to prepare esters, amides, and other functionalized compounds. It serves as a key reagent in pharmaceutical and fine chemical manufacturing due to its reactivity with alcohols and amines. This chemical has a CAS number of 5781-53-3, with the molecular formula ClCOCOOCH3 and a molecular weight of 122.51 g/mol. It is stored at ambient conditions but requires careful handling due to its hazardous nature, marked by a "Danger" signal word. Molekula supplies methyl oxalyl chloride 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
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.
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25 g — £123.40 per pack ex VAT · £148.08 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Colourless liquid |
| Assay GC | ≥98.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 46 °C |
| Transport Class | 3(8) |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 24487278 |
| CAS Number | 5781-53-3 |
| IUPAC Name | methyl 2-chloro-2-oxoacetate |
| EC Number | 227-307-4 |
| Molecular Formula | ClCOCOOCH3 |
| Molecular Weight | 122.51 |
| Exact Mass | 121.9771 |
| SMILES | COC(=O)C(=O)Cl |
| InChIKey | ZXUQEPZWVQIOJE-UHFFFAOYSA-N |
| InChI | InChI=1S/C3H3ClO3/c1-7-3(6)2(4)5/h1H3 |
| PubChem CID | 79846 |
| UN Number | UN2920 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29171940 |
| Tariff Code | 2917198090 |
Safety & GHS
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Flammable
GHS02
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Corrosive
GHS05
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Health Hazard
GHS07
Hazard statements
- EUH014 Reacts violently with water
- EUH029 Contact with water liberates toxic gas
- H226 Flammable liquid and vapour
- H302 Harmful if swallowed
- H314 Causes severe skin burns and eye damage
- H335 May cause respiratory irritation
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P223 Keep away from any possible contact with water, because of violent reaction and possible flash fire
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- 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, Italian, 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
- Acetic acid, 2-chloro-2-oxo-, methyl ester
- Acetic acid, chlorooxo-, methyl ester
- Chloroglyoxylic Acid Methyl Ester
- chlorooxoacetic acid methyl ester
- methoxalyl chloride
- Methyl (Chlorocarbonyl)formate
- methyl 2-chloro-2-oxoacetate
- Methyl chloroglyoxylate
- methyl chlorooxalate
- Methyl chlorooxoacetate
Frequently asked questions
What is methyl oxalyl chloride commonly used for?
Methyl oxalyl chloride is primarily used as an intermediate in organic synthesis, including the production of pharmaceuticals, agrochemicals, and specialty chemicals like dyes and perfumes.
What is the chemical formula and molecular weight of methyl oxalyl chloride?
The chemical formula is **ClCOCOOCH₃**, and the molecular weight is **122.51 g/mol**.
How should methyl oxalyl chloride be stored?
Store at **ambient temperature** in a cool, dry place, away from moisture and incompatible materials, in a tightly sealed container.
What grades or purities of methyl oxalyl chloride does Molekula supply?
Molekula supplies methyl oxalyl chloride in **technical and reagent-grade purities**, typically ≥95% by GC/HPLC unless specified otherwise.
Can Molekula supply methyl oxalyl chloride in bulk quantities?
Yes, Molekula can supply methyl oxalyl chloride in **bulk quantities** (e.g., drums, IBCs) for industrial or large-scale applications—please contact us for specific packaging options.
What documentation comes with an order of methyl oxalyl chloride?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a **technical datasheet** detailing purity, specifications, and handling instructions.
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.