Chemistry informtion about  Xanthene (CAS NO.92-83-1) is:
IUPAC Name: 9H-xanthene
Synonyms: 10h-9-Oxaanthracene ; 9h-Xanthene ; Dibenzo[A,E]Pyran ; Dibenzopyran, Tricyclic ; Xanthane ; Dibenzopyran ; Xanthan ; Xanthene
MF: C₁₃H₁₀O
MW: 182.22
EINECS: 202-194-4 
Melting Point: 101-102 °C(lit.)
Density: 1.159 g/cm³
Flash Point: 137.5 °C
Boiling Point: 311 °C at 760 mmHg
Vapour Pressure: 0.00106 mmHg at 25°C 
Enthalpy of Vaporization: 52.99 kJ/mol
Water Solubility: Soluble
Stability: Stable, Combustible,Incompatible with oxidizing agents.
Following is the molecular structure of  Xanthene (CAS NO.92-83-1) is:

 Xanthene (CAS NO.92-83-1) is used as a fungicide and it is also a useful intermediate in organic synthesis.

Preparation Products: Xanthene-9-Carboxylic Acid
Raw Materials: Sodium Hydroxide→Diethyl Ether→Phenol→Phosphorus Pentoxide→2-Hydroxybenzyl Alcohol

Reported in EPA TSCA Inventory.

Moderately toxic by subcutaneous route. When heated to decomposition it emits acrid smoke and irritating fumes.
Hazard Codes: 
Xn: Harmful
Risk Statements:
R42/43: May cause sensitization by inhalation and skin contact.
Safety Statements:
S22: Do not breathe dust. 
S36/37: Wear suitable protective clothing and gloves.
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S24: Avoid contact with skin.
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection.
WGK Germany: 3
RTECS: ZD5520000
HS Code: 29181100

 Xanthene (CAS NO.92-83-1) is a yellow organic heterocyclic compound.
First Aid Measures:
Ingestion: If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. May cause digestive tract disturbances. Seek medical assistance.
Inhalation: Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult. May cause respiratory tract irritation. Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Skin: Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Remove contaminated clothing and shoes. May cause skin irritation.
Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Immediately flush with running water for at least 20 minutes. May cause eye irritation.
Handling and Storage:
Storage: Keep away from heat, sparks, and flame. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area. Keep containers tightly closed.
Handling: Ground and bond containers when transferring material. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.