2,3,5,6-Tetrachlorophenol

Empirical Formula: C₆H₂Cl₄O
Molecular Weight: 231.8915 g/mol
EINECS: 213-310-8 
Index of Refraction: 1.62
Density: 1.709 g/cm³
Flash Point: 111.7 °C
Enthalpy of Vaporization: 51.89 kJ/mol
Boiling Point: 261 °C at 760 mmHg
Vapour Pressure: 0.00727 mmHg at 25 °C
Storage tempreture: Approx 4 °C
Solubility: Insoluble in water
Appearance: Leaflets (from ligroin) or light beige powder
Structure of 2,3,5,6-Tetrachlorophenol (CAS NO.935-95-5):
                     
IUPAC Name: 2,3,5,6-Tetrachlorophenol
Product Categories of 2,3,5,6-Tetrachlorophenol (CAS NO.935-95-5): PhenolsInternational Standards;Chemical Class;Chloro Analytical Standards;Halogenated;T-ZAlphabetic;Alpha sort;Pesticides & Metabolites;Phenols Volatiles/ Semivolatiles
 

Chlorophenol compounds are on the Community Right-To-Know List.

Poison by ingestion. Moderately toxic by intraperitoneal route. When heated to decomposition it emits toxic fumes of Cl⁻. See also CHLOROPHENOLS.
Hazard Codes of 2,3,5,6-Tetrachlorophenol (CAS NO.935-95-5): T,F
Risk Statements: 25-37/38-41-39/23/24/25-23/24/25-11 
R11:Highly flammable. 
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed. 
R25 :Toxic if swallowed. 
R37/38:Irritating to respiratory system and skin. 
R39:Danger of very serious irreversible effects. 
R41:Risk of serious damage to the eyes.
Safety Statements: 26-39-45-36/37-16 
S16:Keep away from sources of ignition. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37:Wear suitable protective clothing and gloves. 
S39:Wear eye / face protection. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)

 2,3,5,6-Tetrachlorophenol ,its cas register number is 935-95-5. It also can be called Phenol, 2,3,5,6-tetrachloro- ; and 2,3,5,6-Tetrachlorophenate . It is incompatible with acid chlorides, acid anhydrides and oxidizing agents.