499-78-5
499-78-5 structure
- Name: Comenic Acid
- Chemical Name: 5-hydroxy-4-oxopyran-2-carboxylic acid
- CAS Number: 499-78-5
- Molecular Formula: C6H4O5
- Molecular Weight: 156.09300
- Create Date: 2018-08-01 11:13:21
- Modify Date: 2025-08-24 20:34:01
| Name | 5-hydroxy-4-oxopyran-2-carboxylic acid |
|---|---|
| Synonyms |
2-Carboxy-5-hydroxy-4-pyrone
5-Hydroxy-4-oxo-4H-pyran-2-carboxylic acid Comenic acid 5-hydroxy-4-pyrone-2-carboxylic acid 5-hydroxy-2-carboxy-4-pyrone |
| Density | 1.819g/cm3 |
|---|---|
| Boiling Point | 420.7ºC at 760mmHg |
| Melting Point | 284-294ºC |
| Molecular Formula | C6H4O5 |
| Molecular Weight | 156.09300 |
| Flash Point | 187.7ºC |
| Exact Mass | 156.00600 |
| PSA | 87.74000 |
| LogP | 0.04360 |
| Vapour Pressure | 7.71E-09mmHg at 25°C |
| Index of Refraction | 1.66 |
| Hazard Codes | Xn: Harmful; |
|---|---|
| Risk Phrases | 22 |
| HS Code | 2932999099 |
|
~%
499-78-5 |
| Literature: Peratoner; Leone Gazzetta Chimica Italiana, 1894 , vol. 24 II, p. 81 |
|
~%
499-78-5 |
| Literature: Robiquet Annales de Chimie (Cachan, France), 1833 , vol. <2> 53, p. 428 |
|
~%
499-78-5 |
| Literature: Liebig Justus Liebigs Annalen der Chemie, 1833 , vol. 7, p. 237 Full Text Show Details How Justus Liebigs Annalen der Chemie, 1851 , vol. 80, p. 92 Anm. Justus Liebigs Annalen der Chemie, 1852 , vol. 83, p. 353 |
|
~%
499-78-5 |
| Literature: Robiquet Annales de Chimie (Cachan, France), 1832 , vol. <2> 51, p. 259,264 Justus Liebigs Annalen der Chemie, 1833 , vol. 5, p. 106,109 |
|
~%
499-78-5 |
| Literature: v. Korff Justus Liebigs Annalen der Chemie, 1866 , vol. 138, p. 195 |
|
~%
499-78-5 |
| Literature: Reibstein Journal fuer Praktische Chemie (Leipzig), 1881 , vol. <2> 24, p. 277 |
| Precursor 4 | |
|---|---|
| DownStream 3 | |
| HS Code | 2932999099 |
|---|---|
| Summary | 2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |