Molecular Formula: C₁₄H₁₀O₃
Molar mass: 226.23 g/mol
EINECS: 201-394-9
Density: 1.335 g/cm³
Flash Point: 153.1 °C
Index of Refraction: 1.646
Boiling Point: 391.3 °C at 760 mmHg
Vapour Pressure: 7.99E-07 mmHg at 25°C
Melting point: 221-225 °C(lit.)
Appearance: Solid
Solubility: Methanol: 0.1 g/mL, clear
Product categories of Xanthene-9-carboxylic acid (CAS NO.82-07-5): Drug bulk;Heterocyclic Building Blocks;O-Containing;Aromatic Carboxylic Acids, Amides, Anilides, Anhydrides & Salts
Structure of Xanthene-9-carboxylic acid (CAS NO.82-07-5):
            
XLogP3-AA: 2.2
H-Bond Donor: 1
H-Bond Acceptor: 3
IUPAC Name: 9H-Xanthene-9-carboxylic acid
Canonical SMILES: C1=CC=C2C(=C1)C(C3=CC=CC=C3O2)C(=O)O
InChI: InChI=1S/C14H10O3/c15-14(16)13-9-5-1-3-7-11(9)17-12-8-4-2-6-10(12)13/h1-8,13H,(H,15,16) 
InChIKey: VSBFNCXKYIEYIS-UHFFFAOYSA-N

 Xanthene-9-carboxylic acid (CAS NO.82-07-5) can be used of intermediate of anticholinergic drug: propantheline bromide.

Take the mixture of Xanthene alcohol , Sodium cyanide , Acetic acid , Ethanol and water into the reaction tank for a confined heating and slowly heated to 95 °C at the pressure 0.1-0.2MPa for 6h. Then using lye for refluxing 20h, after that using Hydrochloric acid, at last, we will get: Xanthene-9-carboxylic acid (CAS NO.82-07-5).

Hazard Codes: Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-37/39
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing. 
S37/39:Wear suitable gloves and eye/face protection.
 

 Xanthene-9-carboxylic acid ,its cas register number is 82-07-5. It also can be called 9-Xanthenecarboxylic acid ; 9H-Xanthene-9-carboxylic acid ; Xanthenecarboxylic acid and Xanthanoic acid .