Molekula
Methacryloyl chloride, stabilised with 400ppm phenothiazine
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
Methacryloyl chloride is an acyl chloride monomer used primarily in polymer synthesis, adhesives, and coatings for its reactivity in forming methacrylate polymers. A documented application is making hydrogels for contact lenses, where it is reacted with poly(vinylpyrrolidinone) and copolymerised with 2-hydroxyethyl methacrylate. It is stabilised with 400ppm phenothiazine to prevent degradation. This chemical has a CAS number of 920-46-7, a molecular formula of CH2=C(CH3)COCl, and a molecular weight of 104.53. It must be stored at -15 to -20°C and carries a **Danger** signal word. Molekula supplies Methacryloyl 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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 | Colourless to pale yellow transparent liquid |
| Density | 1.07g/ml |
| Assay | 98.5% min |
| Others | Methacrylic acid: 0.5% max; Methacrylic anhydride: 0.5% max. |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | -15 to -20 °C |
| Flash Point | 12 °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 |
|---|---|
| Melting Point | -60 °C |
| Boiling Point | 96 °C |
| Density | 1.0871 g/cm³ at 20 °C |
| Vapour Pressure | 45.5 mmHg |
| Refractive Index | 1.4435 |
Source: PubChem CID 13528 (HSDB, Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 44427234 |
| CAS Number | 920-46-7 |
| IUPAC Name | 2-methylprop-2-enoyl chloride |
| EC Number | 213-058-9 |
| Molecular Formula | CH2=C(CH3)COCl |
| Molecular Weight | 104.53 |
| Exact Mass | 104.0029 |
| SMILES | CC(=C)C(=O)Cl |
| InChIKey | VHRYZQNGTZXDNX-UHFFFAOYSA-N |
| InChI | InChI=1S/C4H5ClO/c1-3(2)4(5)6/h1H2,2H3 |
| PubChem CID | 13528 |
| UN Number | UN3488 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2916195000 |
| Tariff Code | 2916199590 |
Safety & GHS
-
Flammable
GHS02
-
Corrosive
GHS05
-
Toxic
GHS06
Hazard statements
- EUH029 Contact with water liberates toxic gas
- H225 Highly flammable liquid and vapour
- H302 Harmful if swallowed
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H317 May cause an allergic skin reaction
- H330 Fatal if inhaled
- H412 Harmful to aquatic life with long lasting effects
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
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P310 Immediately call a POISON CENTER or doctor/physician
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
No alternate names recorded for this product.
Frequently asked questions
What is methacryloyl chloride primarily used for?
Methacryloyl chloride is primarily used as a reagent in organic synthesis, particularly for the preparation of methacrylates, pharmaceutical intermediates, and specialty polymers.
What is the chemical formula and molecular weight of methacryloyl chloride?
The chemical formula is **CH₂=C(CH₃)COCl**, and the molecular weight is **104.53 g/mol**.
How should methacryloyl chloride be stored?
It must be stored at **-15 to -20°C** to maintain stability, as it is highly reactive and decomposes at higher temperatures.
What grade of methacryloyl chloride does Molekula supply?
Molekula supplies **technical-grade methacryloyl chloride**, stabilized with **400ppm phenothiazine** to prevent polymerization.
Can Molekula supply methacryloyl chloride in bulk quantities?
Yes, Molekula can supply methacryloyl chloride in bulk, subject to availability and customer requirements—please contact us for specific inquiries.
What documentation comes with an order of methacryloyl chloride?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability and compliance.
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.