3-Hydroxyflavone is a chemical compound. It is the backbone of all flavonols, a type of flavonoid. It is a synthetic compound, which is not found naturally in plants. It serves as a model molecule as it possesses an excited-state intramolecular proton transfer (ESIPT) effect to serve as a fluorescent probe to study membranes for example or intermembrane proteins. The green tautomer emission (λmax ≈ 524nm) and blue-violet normal emission (λmax ≈ 400nm) originate from two different ground state populations of 3HF molecules. The phenomenon also exists in natural flavonols. Although 3-hydroxyflavone is almost insoluble in water, its aqueous solubility (hence bio-availability) can be increased by encapsulation in cyclodextrin cavitiies

CAS：577-85-5
中文别名：黃酮醇;3-羟基黄酮;3-黄酮醇;
英文别名：FLAVONE,3-HYDROXY;2-phenyl-6-hydroxy-4-benzopyrone;4H-1-Benzopyran-4-one,3-hydroxy-2-phenyl;4H-1-Benzopyran-4-one, 3-hydroxy-2-phenyl-;Flavon-3-ol;2-phenyl-3-hydroxy-4-oxo-4H-1-benzopyran;3-OH-flavone;Flavonol;3-hydroxy-2-phenylchromen-4-one;3-Hydroxyflavone;
分子式：C15H10O3
分子量：238.238
精确质量：238.063
Psa：50.44
Logp：3.1656

MDL号：MFCD00006832
EINECS号：209-416-9

密度：1.367 g/cm3
沸点：393.7ºC at 760 mmHg
熔点：171-172°C(lit.)
闪点：151.5ºC
折射率：1.679
储存条件：0-6ºC

RTECS号：LK8650000
安全说明：S26; S37/39
WGK Germany：3
危险类别码：R36/37/38
海关编码：2932999099
危险品标志：Xi

用途
类黄酮的一种;中药对照品;溶于乙醇后会产生全光光开关使用。