ANNEX I
E 242 DIMETHYL DICARBONATE
Synonyms | DMDC |
Dimethyl pyrocarbonate | |
Definition | |
Chemical name | Dimethyl dicarbonate |
Pyrocarbonic acid dimethyl ester | |
Einecs | 224-859-8 |
Chemical formula | C4H6O5 |
Molecular weight | 134,09 |
Assay | Content not less than 99,8 % |
Description | Colourless liquid, decomposes in aqueous solution. It is corrosive to skin and eyes and toxic by inhalation and ingestion |
Identification | |
| After dilution positive tests for CO2 and methanol |
| 17 oC |
Boiling point | 172 oC with decomposition |
| Approximately 1,25 g/cm3 |
| Maxima at 1 156 and 1 832 cm- 1 |
Purity | |
Dimethyl carbonate | Not more than 0,2 % |
Chlorine, total | Not more than 3 mg/kg |
Arsenic | Not more than 3 mg/kg |
Lead | Not more than 5 mg/kg |
Mercury | Not more than 1 mg/kg |
Heavy metals (as Pb) | Not more than 10 mg/kg |