Diose
glycollaldehyde
CAS: 141-46-8
Molecular Formula: C2H4O2
Diose - Names and Identifiers
| Name | glycollaldehyde |
| Synonyms | Diose HOCH2CHO Glycoaldehyde GLYCOLALDEHYDE glycollaldehyde GLYCOLICALDEHYDE Hydroxyacetaldehyde hydroxy-acetaldehyd Methylol formaldehyde |
| CAS | 141-46-8 |
| EINECS | 205-484-9 |
| InChI | InChI=1/C2H4O2/c3-1-2-4/h1,4H,2H2 |
Diose - Physico-chemical Properties
| Molecular Formula | C2H4O2 |
| Molar Mass | 60.05 |
| Density | 1.3660 |
| Melting Point | 97°C |
| Boling Point | 35.05°C (rough estimate) |
| Flash Point | 42°C |
| Vapor Presure | 4.15mmHg at 25°C |
| pKa | 13.34±0.10(Predicted) |
| Refractive Index | 1.4772 |
Diose - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| overview | at present, the production methods of glycolaldehyde (hydroxyacetaldehyde) mainly include formaldehyde hydroformylation, selective formose reaction, aqueous pyrolysis of sugar alcohol and nitrogen-containing heterocyclic carbene catalysis. Although the reaction conditions of hydroformylation of formaldehyde catalyzed by rhodium are mild, it still needs high pressure and rhodium is expensive. Although the selective formose reaction and aqueous pyrolysis of sugar alcohol are cheap and easy to obtain, the reaction conditions need to be strictly controlled and a large amount of wastewater will be generated. Development must solve the problem of wastewater treatment. In contrast, N-heterocyclic carbene catalyzes the self-condensation of formaldehyde. Formaldehyde with a wide range of sources and low price is used as the starting material. It has high catalytic efficiency, good selectivity, easy separation of products and good stability, and has the most development and application prospects. |
| Use | Ethanol aldehyde (hydroxyacetaldehyde)(HOCHCHO,Glycolaldehyde) is the simplest sugar, which can form ribose after reacting with acrolein. This is an important component of RNA. It is a very critical sugar molecule in the origin of life. There are two functional groups of aldehyde group and hydroxyl group in its molecule, which have the dual properties of alcohol and aldehyde, and the chemical properties are active. As an important chemical intermediate, it is widely used in food, medicine and health, chemical industry and other industries. |
| preparation | hydroxyacetaldehyde is prepared as follows: formaldehyde (30mmol) is placed in the reaction kettle, then N,N-dimethylformamide (10ml) is added to the reaction kettle, amidine catalyst I-K(0.15mmol, as shown in fig. 2) or silica gel is supported with triazole catalyst A- H(1g,0.15mmol triazole salt/g carrier, as shown in Figure 2), the auxiliary triethylamine (0.70mmol). Install the reaction kettle and stir for 1-1000 minutes at a temperature of 0-300 ℃ and a pressure of 0-10MPa. |
Last Update：2024-04-09 20:52:54
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