5,7-Dihydroxy-2-(4-hydroxyphenyl)-4H-chromen-4-one CAS No.520-36-5 / Cat No.EBD2138579
75590
C.I. Natural Yellow 1
5,7-dihydroxy-2-(4-hydroxyphenyl)-4H-chromen-4-one
5,7-Dihydroxy-2-(4-hydroxyphenyl)-4H-chromen-4-one
apigenin
75580
75590
C.I. Natural Yellow 1
5,7-dihydroxy-2-(4-hydroxyphenyl)-4H-chromen-4-one
Properties
-
Appearance:
Pale Yellow Crystalline Solid
-
Density:
1.548 g/cm3
-
Melting point:
>300 °C(lit.)
-
Boiling point:
555.5 °C at 760 mmHg
-
Flashing point:
217 °C
-
Storage temperature:
−20°C
-
Solubility:
DMSO: 27 mg/mL
Safety Information
-
Symbol:
-
Signal words:
Warning -
Hazard statements:
H315 Causes skin irritation.
H319 Causes serious eye irritation.
H335 May cause respiratory irritation.
-
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
NMR Spectrum
Prediction： 13C NMR (125 MHz, DMSO-d6) delta 182.2 (C-4), 164.6 (C-2), 164.2 (C-7), 161.9 (C-5), 161.6 (C-4), 157.8 (C-9), 128.9 (C-2 and C-6), 121.6 (C-1), 116.4 (C-3 and C-5), 104.2 (C-10), 103.3 (C-3), 99.3 (C-6), 94.4 (C-8)
1H NMR
13C NMR
