-
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
Orange Cassiae
Aurantio-obtusin
【Structural formula】
[Molecular formula and molecular weight] C 17 H 14 O 7;330.
[Source] Leguminous plant Cassia obtusi folia L.
【Properties】Orange powder
This product is easily soluble in methanol and almost insoluble in ether
Melting point: 229~231℃
【Purity Check】
TLC
1.
Eluent petroleum ether (30 ~ 60 ℃) - acetone (5:2)
Check under 366nm ultraviolet light before color development, and under sunlight after ammonia vapor color development
2.
Developing solvent n-hexane - ethyl acetate - formic acid (15: 5: 1)
Check under 366nm ultraviolet light before color development, and under sunlight after ammonia vapor color development
High performance liquid chromatography
Phenomenex C 18 Column , 5um (4.
Mobile phase acetonitrile -0.
Acetonitrile, 30-40min, 90% acetonitrile, flow rate 1ml/min
Detection wavelength 284nm
Differential calorimetry
Start temperature 50℃, end temperature 300℃, heating rate 5℃/min
【Structural identification】285,313,393
3448(-OH), 2951, 2928, 2851, 1656 (C=O), 1627
ESI-MS m/z: 329[M—H] -
1 H-NMR (acetone-d 6 ) δ: 2.
13 C-NMR (acetone-d 3 ) δ: 147.
【Storage】Dry and avoid light