-
Categories
-
Pharmaceutical Intermediates
-
Active Pharmaceutical Ingredients
-
Food Additives
- Industrial Coatings
- Agrochemicals
- Dyes and Pigments
- Surfactant
- Flavors and Fragrances
- Chemical Reagents
- Catalyst and Auxiliary
- Natural Products
- Inorganic Chemistry
-
Organic Chemistry
-
Biochemical Engineering
- Analytical Chemistry
- Cosmetic Ingredient
-
Pharmaceutical Intermediates
Promotion
ECHEMI Mall
Wholesale
Weekly Price
Exhibition
News
-
Trade Service
4-hydroxyphenylacetic acid
4-Hydroxyphenylacetic acid
【Structural formula】
[Molecular formula and molecular weight] C 8 H 8 O 3 ; 152.
[Source] Synthesis
【Properties】White amorphous powder
This product is easily soluble in methanol and ethanol
Melting point: 151~153℃
【Purity Check】
TLC
1.
Eluent methylene chloride - methanol - acetic acid (5:0.
Inspect ultraviolet light (254nm) and 10% sulfuric acid ethanol solution, heated at 105°C until the color is clear, inspect under sunlight
2.
Eluent petroleum ether - ethyl ether - acetic acid (3:5:0.
Check the UV lamp (254nm) and 10% sulfuric acid ethanol solution, heat at 105℃ until the color is clear, check the high performance liquid chromatography under sunlight
Chromatographic column Agilent C 18 , 5um (4.
Mobile phase methanol-water-glacial acetic acid aqueous solution (14:86:1), 1ml/min
Detection wavelength 224nm
Differential calorimetry
Start temperature 50℃, end temperature 300℃, heating rate 5℃/min
【Structural identification】202,225,278
3260 (-OH), 1708 (C=O), 1369 (C=O), 1323, 1518, 1215, 902, 823, 789, 656
FAB-MS m/z: 153[M+H] +
1 H-NMR (MeOD) δ: 7.
13 C-NMR (MeOD) δ: 176.
【Storage】Dry and avoid light
.
Related Links: Oroxylin B