| Boiling Point | 95–159°C at 750 mmHg |
| Melting Point | 114–116°C |
| Color | White-Yellow |
| Linear Formula | (CH3)4C4(=O)2 |
| Formula Weight | 140.18 |
| Physical Form | Crystal-powder at 20°C |
| Chemical Name or Material | Tetramethyl-1,3-cyclobutanedione [Precursor to Dimethyl Ketene] |
| Molecular Weight | 140.18 g/mol |
| Assay | 99% |
| CAS Number | 933-52-8 |
| EC Number | 213-269-6 |
| NACRES | NA.22 |
| PubChem Substance ID | 24900013 |
| UNSPSC Code | 12352100 |
| MDL Number | MFCD00001331 |
| Applications | Precursor to dimethylketene manufacturing (per Sarchem's existing product notes) |
This compound is a four-membered ring bearing two ketone groups and four methyl substituents. It’s the dimer of dimethylketene, and thermal cracking regenerates the reactive ketene monomer — a useful controlled-release strategy for this otherwise hard-to-handle reactive intermediate.
This compound is used as a stable, shelf-stable precursor to dimethylketene, which is generated on demand by thermal cracking for use in polymer and specialty-chemical manufacturing processes.
