Chemistry informtion about 2-Cyclohexyl-4,6-Dinitrophenol (CAS NO.131-89-5) is:
IUPAC Name: 2-Cyclohexyl-4,6-Dinitrophenol
Synonyms: 2,4-Dinitro-6-Cyclohexylphenol ; 2-Cyclohexyl-4,6-Dinitrofenol ; 2-Cyclohexyl-4,6-Dinitro-Pheno ; 4,6-Dinitro-O-Cyclohexylphenol ; 6-Cicloesil-2,4-Dinitr-Fenolo ; 6-Cyclohexyl-2,4-Dinitro-Pheno ; 6-Cyclohexyl-2,4-Dinitrophenol ; Dinitro-O-Cyclohexylphenol
MF: C₁₂H₁₄N₂O₅
MW: 266.25
EINECS: 205-042-5 
Density: 1.381 g/cm³
Flash Point: 129.6 °C
Boiling Point: 320.9 °C at 760 mmHg
Vapour Pressure: 0.000164 mmHg at 25°C 
Enthalpy of Vaporization: 58.5 kJ/mol
Following is the molecular structure of 2-Cyclohexyl-4,6-Dinitrophenol (CAS NO.131-89-5) is:

A poison by ingestion, intraperitoneal, intravenous, subcutaneous, and possibly other routes. Moderately toxic by skin contact. A skin irritant. Fire hazard. See also NITRATES and PHENOLS. Can react with oxidizers. When heated to decomposition it emits toxic fumes of NO_x. 
Hazard Codes:
T
N
Risk Statements:
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements:
S13:Keep away from food, drink and animal foodstuffs. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S60:This material and its container must be disposed of as hazardous waste. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
RIDADR: 2779
HazardClass: 6.1(b)
PackingGroup: III

2-Cyclohexyl-4,6-Dinitrophenol (CAS NO.131-89-5) is a yellow crystals.It reacts with oxidizing materials and combustibles [USCG, 1999]. Special Hazards of Combustion Products: Can detonate or explode when heated under confinement [USCG, 1999]. Aromatic nitro compounds, such as 2-Cyclohexyl-4,6-Dinitrophenol , range from slight to strong oxidizing agents. If mixed with reducing agents, including hydrides, sulfides and nitrides, they may begin a vigorous reaction that culminates in a detonation. The aromatic nitro compounds may explode in the presence of a base such as sodium hydroxide or potassium hydroxide even in the presence of water or organic solvents. The explosive tendencies of aromatic nitro compounds are increased by the presence of multiple nitro groups. Phenols do not behave as organic alcohols, as one might guess from the presence of a hydroxyl (-OH) group in their structure. Instead, they react as weak organic acids. Phenols and cresols are much weaker as acids than common carboxylic acids (phenol has Ka = 1.3 x 10^[-10]). These materials are incompatible with strong reducing substances such as hydrides, nitrides, alkali metals, and sulfides. Flammable gas (H₂) is often generated, and the heat of the reaction may ignite the gas. Heat is also generated by the acid-base reaction between phenols and bases. It liver damage, metabolic stimulant, dermatitis, dilation of pupils.