Molecular structure of 7-Hydroxy-4-trifluoromethylcoumarin (CAS NO.575-03-1) is:

Product Name: 7-Hydroxy-4-trifluoromethylcoumarin
CAS Registry Number: 575-03-1
IUPAC Name: 7-hydroxy-4-(trifluoromethyl)chromen-2-one
Molecular Weight: 230.14011 [g/mol]
Molecular Formula: C₁₀H₅F₃O₃
XLogP3: 2.4
H-Bond Donor: 1
H-Bond Acceptor: 6
Melting Point: 179-182°C
Molar Volume: 146.5 cm³
Surface Tension: 45.5 dyne/cm
Density: 1.569 g/cm³
Flash Point: 142.2 °C
Enthalpy of Vaporization: 57.44 kJ/mol
Boiling Point: 311.4 °C at 760 mmHg
Vapour Pressure: 0.000308 mmHg at 25°C
Product Categories: Coumarins;Coumarin;API intermediates;Biochemicals and Reagents;Detection;Fluorescent Probes, Labels, Particles and Stains

Safty information about 7-Hydroxy-4-trifluoromethylcoumarin (CAS NO.575-03-1) is:
Hazard Codes: Xi;T
Risk Statements: 36/37/38-25
 R36/37/38:Irritating to eyes, respiratory system and skin. 
R25 :Toxic if swallowed.
Safety Statements: 26-36-45 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR: UN 2811 6.1/PG 3
WGK Germany 3
F: 8-10
Hazard Note: Irritant
HazardClass: IRRITANT

 7-Hydroxy-4-trifluoromethylcoumarin , its cas register number is 575-03-1. It also can be called 7,4-Hfc ; 2H-1-Benzopyran-2-one, 7-hydroxy-4-(trifluoromethyl)- .It is a off-white to light yellow or pink powder.