2-(3',4'-dihydroxyphenyl)-5,7-dihydroxy-4H-1-benzopyran-4-one CAS No.491-70-3 / Cat No.EBD2156836
IBS_STOCK1N-14308
2-(3',4'-dihydroxyphenyl)-5,7-dihydroxy-4H-1-benzopyran-4-one
Luteolin
C.I. 75590
C.I. Natural Yellow 2
3,4,5,7-Tetrahydroxyflavone
2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-4H-chromen-4-one
C.I. Natural Yellow 2
3,4,5,7-Tetrahydroxyflavone
2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-4H-chromen-4-one
Properties
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Appearance:
yellow crystalline powder
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Density:
1.654 g/cm3
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Melting point:
~330 °C(lit.)
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Boiling point:
616.1 °C at 760 mmHg
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Flashing point:
239.5 °C
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Storage temperature:
2-8°C
Safety Information
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Symbol:
-
Signal words:
Warning -
Hazard statements:
H315 Causes skin irritation.
H319 Causes serious eye irritation.
H335 May cause respiratory irritation.
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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 182.0 (C-4), 164.8 (C-7), 164.3 (C-2), 161.9 (C-7), 157.7 (C-9), 150.2 (C-4), 146.2 (C-3), 121.9 (C-1), 119.4 (C-6), 116.4 (C-5), 113.8 (C-2), 104.0 (C-10), 103.3 (C-3), 99.3 (C-6), 94.3 (C-8)
1H NMR
13C NMR
