Molekula
4,4'-Bis(dimethylamino)benzophenone (Michler's ketone)
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
4,4'-Bis(dimethylamino)benzophenone, also known as Michler's ketone, is a fluorescent organic compound used as a photoinitiator in polymer chemistry and as a dye intermediate. It appears as a yellow crystalline solid with a molecular formula of C17H20N2O and a molecular weight of 268.35 g/mol. CAS number: 90-94-8. Store at ambient temperature. Signal word: Danger. Molekula supplies Michler's ketone 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
On backorder — expected to ship by 25 November 2026
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.
-
100 g — £30.90 per pack ex VAT · £37.08 inc. VAT
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 | Grey blue powder |
| Melting Point | 168°C-176°C |
| Purity | 96.5-102.5% |
| Moisture | ≤0.5% |
| Insolubles | ≤2.5% |
| Identification (IR) | Conforms to Structure |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Leaf in alcohol, needles in benzene |
| Melting Point | 172 °C |
| Vapour Pressure | 0.00000107 mmHg |
Source: PubChem CID 7031 (HSDB, Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 38897058 |
| CAS Number | 90-94-8 |
| IUPAC Name | bis[4-(dimethylamino)phenyl]methanone |
| EC Number | 202-027-5 |
| Molecular Formula | C17H20N2O |
| Molecular Weight | 268.35 |
| Exact Mass | 268.1576 |
| SMILES | CN(C)C1=CC=C(C=C1)C(=O)C2=CC=C(C=C2)N(C)C |
| InChIKey | VVBLNCFGVYUYGU-UHFFFAOYSA-N |
| InChI | InChI=1S/C17H20N2O/c1-18(2)15-9-5-13(6-10-15)17(20)14-7-11-16(12-8-14)19(3)4/h5-12H,1-4H3 |
| PubChem CID | 7031 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29223900 |
| Tariff Code | 2922390090 |
Safety & GHS
-
Corrosive
GHS05
-
Serious Health Hazard
GHS08
Hazard statements
- H318 Causes serious eye damage
- H341 Suspected of causing genetic defects
- H350 May cause cancer
Precautionary statements
- P201 Obtain special instructions before use
- P263 Avoid contact during pregnancy/while nursing
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
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
- Benzophenone, 4,4'-bis(dimethylamino)-
- Bis(4-(dimethylamino)phenyl)methanone
- Methanone, bis[4-(dimethylamino)phenyl]-
- Michler ketone
- Michler's ketone
- N,N,N',N'-Tetramethyl-4,4'-diaminobenzophenone
- p,p'-Bis(dimethylamino)benzophenone
- p,p'-Bis(N,N-dimethylamino)benzophenone
- p,p'-Michler's ketone
- Tetramethyldiaminobenzophenone
Frequently asked questions
What is 4,4'-Bis(dimethylamino)benzophenone (Michler's ketone) commonly used for?
Michler's ketone is primarily used as a photoinitiator in UV-curable coatings, inks, and adhesives, and as a sensitizer in photopolymerization processes.
What is the chemical formula and molecular weight of Michler's ketone?
The chemical formula is **C17H20N2O**, and the molecular weight is **268.35 g/mol**.
How should Michler's ketone be stored?
Store at **ambient temperature** in a cool, dry place, away from direct sunlight and incompatible materials.
What grades or purities of Michler's ketone does Molekula supply?
Molekula supplies **technical-grade** and **high-purity** (98%+) Michler's ketone, depending on application requirements.
Can Molekula supply Michler's ketone in bulk quantities?
Yes, we offer bulk packaging options (e.g., 5 kg, 25 kg, and larger quantities) for industrial and commercial use.
What documentation is provided with an order of Michler's ketone?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
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.