A3139912
2,5-Dihydroxybenzoic acid , 98% , 490-79-9
Synonym(s):
2,5-DHBA;DHB;Gentisic acid;Hydroquinonecarboxylic acid;Mesalazine EP Impurity G
CAS NO.：490-79-9
Empirical Formula: C7H6O4
Molecular Weight: 154.12
MDL number: MFCD00002460
EINECS: 207-718-5
| Pack Size | Price | Stock | Quantity |
| 25G | RMB75.20 | In Stock |
|
| 100G | RMB293.60 | In Stock |
|
| 250g | RMB599.20 | In Stock |
|
| 500G | RMB1126.40 | In Stock |
|
| others | Enquire |
Update time: 2022-07-08
PRODUCT Properties
| Melting point: | 204-208 °C(lit.) |
| Boiling point: | 237.46°C (rough estimate) |
| Density | 1.3725 (rough estimate) |
| refractive index | 1.6400 (estimate) |
| storage temp. | Store below +30°C. |
| solubility | It is soluble in alcohol and ether. |
| pka | 2.97(at 25℃) |
| form | Crystalline Powder |
| color | White to light beige |
| PH | 3.21(1 mM solution);2.56(10 mM solution);2.01(100 mM solution) |
| Water Solubility | soluble |
| Merck | 14,4398 |
| BRN | 2209119 |
| InChIKey | WXTMDXOMEHJXQO-UHFFFAOYSA-N |
| LogP | 1.740 |
| CAS DataBase Reference | 490-79-9(CAS DataBase Reference) |
| NIST Chemistry Reference | 2,5-Dihydroxybenzoic acid(490-79-9) |
| EPA Substance Registry System | Benzoic acid, 2,5-dihydroxy- (490-79-9) |
Description and Uses
Gentisic acid is a dihydroxy benzoic acid. It is a derivative of benzoic acid and a minor (1 %) product of the metabolic break down of aspirin, excreted by the kidneys.
It is also found in the African tree Alchornea cordifolia and in wine.
Medicine, as sodium gentisate (analgesic).
Safety
| Symbol(GHS) |  GHS07 |
| Signal word | Warning |
| Hazard statements | H302 |
| Precautionary statements | P264-P270-P301+P312-P501 |
| Hazard Codes | Xn,Xi |
| Risk Statements | 22-36/37/38 |
| Safety Statements | 26-36-37/39 |
| WGK Germany | 3 |
| RTECS | LY3850000 |
| Hazard Note | Harmful |
| TSCA | Yes |
| HS Code | 29182990 |
