Molekula
2,2-Dimethoxy-2-phenylacetophenone
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
2,2-Dimethoxy-2-phenylacetophenone, commonly known as DMPA, is a photoinitiator widely used in UV-curable coatings, inks, and adhesives to enable rapid polymerization under ultraviolet light. This clear, crystalline solid is highly effective in free-radical photopolymerization processes, offering excellent solubility in organic solvents and strong absorption in the UV range. This chemical has a CAS number of 24650-42-8, with a molecular formula of C16H16O3 and a molecular weight of 256.30 g/mol. It is stable at ambient storage conditions and carries a signal word of "Warning" for safety classification. Molekula supplies 2,2-Dimethoxy-2-phenylacetophenone 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.
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 — £26.40 per pack ex VAT · £31.68 inc. VAT
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100 g — £59.20 per pack ex VAT · £71.04 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.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystal powder |
| Melting Point | 63 - 68℃ |
| Ash | ≤0.1% |
| Purity | ≥99.0% |
| Volatile Matter | ≤0.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 163 °C |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 29459523 |
| CAS Number | 24650-42-8 |
| IUPAC Name | 2,2-dimethoxy-1,2-diphenylethanone |
| EC Number | 246-386-6 |
| Molecular Formula | C16H16O3 |
| Molecular Weight | 256.30 |
| Exact Mass | 256.1099 |
| SMILES | COC(C1=CC=CC=C1)(C(=O)C2=CC=CC=C2)OC |
| InChIKey | KWVGIHKZDCUPEU-UHFFFAOYSA-N |
| InChI | InChI=1S/C16H16O3/c1-18-16(19-2,14-11-7-4-8-12-14)15(17)13-9-5-3-6-10-13/h3-12H,1-2H3 |
| PubChem CID | 90571 |
| UN Number | UN3077 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29147940 |
| Tariff Code | 2914500060 |
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 Harmful if swallowed
- H317 May cause an allergic skin reaction
- H373 May cause damage to organs through prolonged or repeated exposure
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P270 Do not eat, drink or smoke when using this product
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
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
- 1,2-Diphenyl-2,2-dimethoxyethanone
- 2,2-Dimethoxy-1,2-diphenylethanone
- Benzil dimethyl acetal
- Benzil dimethyl ketal
- Esacure KB 1
- Ethanone, 2,2-dimethoxy-1,2-diphenyl-
- Irgacure 651
- Kayacure BDMK
- Lucirin BDK
- Photomer 51
Frequently asked questions
What is 2,2-Dimethoxy-2-phenylacetophenone (CAS 24650-42-8) commonly used for?
This compound is primarily used as a **photoinitiator** in UV-curable coatings, inks, adhesives, and stereolithography (3D printing) resins due to its ability to generate free radicals upon exposure to light.
What is the molecular formula and molecular weight of 2,2-Dimethoxy-2-phenylacetophenone?
The molecular formula is **C₁₆H₁₆O₃**, and the molecular weight is **256.30 g/mol**.
How should 2,2-Dimethoxy-2-phenylacetophenone be stored?
Store in a **cool, dry place at ambient temperature**, away from direct sunlight and incompatible materials. Ensure containers are tightly sealed.
What purity grades or specifications are available for this product?
Molekula supplies this compound in **technical grade (97%+ purity)** and **analytical/photoresist grade (99%+ purity)**. Custom specifications may be available upon request.
Can Molekula supply 2,2-Dimethoxy-2-phenylacetophenone in bulk quantities?
Yes, we offer bulk packaging options (e.g., 5 kg, 25 kg drums, or larger quantities) for industrial and commercial applications. Contact us for pricing and lead times.
What documentation is provided with an order of 2,2-Dimethoxy-2-phenylacetophenone?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS/SDS)**, and **batch-specific documentation** for traceability. Additional certifications (e.g., REACH, FDA compliance) may be available.
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