4H-1-Benzopyran-4-one,2-(3,4-dihydroxyphenyl)-3,5-dihydroxy-7-methoxy-

Molecular Formula: C₁₆H₁₂O₇
Molecular Weight: 316.26
Index of Refraction: 1.74
Density: 1.634 g/cm³ 
Flash Point: 238.9 °C 
EINECS: 201-974-1
Storage temp: 2-8°C
Melting Point: 293-296°C (dec.)
Enthalpy of Vaporization: 97.68 kJ/mol 
Boiling Point: 627.9 °C at 760 mmHg 
Vapour Pressure: 1.24E-16 mmHg at 25°C 
IUPAC Name: 2-(3,4-Dihydroxyphenyl)-3,5-dihydroxy-7-methoxychromen-4-one
Synonyms: B-rhamnocitrin ; 3,3',4',5'-tetrahydroxy-7-methoxyflavone ; 3,3',4',5-Tetrahydroxy-7-methoxyflavone ; 3,3,4,5-Tetrahydroxy-7-methoxyflavone ; 3,5,3',4'-Tetrahydroxy-7-methoxyflavone ; 7-Methylquercetin ; Quercetin-7-methyl ether ; Rhamnetin
Product Categories: Flavanols
Following is the molecular structure of Rhamnetin (90-19-7):

Rhamnetin (90-19-7) is a chemical compound. It can be isolated from cloves.and it is aslo the aglycone of xanthorhamnin.
 

Safety Information of Rhamnetin (90-19-7):
Hazard Codes: Xi
Xi: Irritant
Risk Statements: 36/37/38
36/37/38: Irritating to eyes, respiratory system and skin 
Safety Statements: 26-36/37
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
36/37: Wear suitable protective clothing and gloves 
WGK Germany: 3
RTECS: LK8748000
F: 3-10
F3: Hygroscopic.
F10: Keep under argon