Molecule structure of Selenium monochloride (CAS NO.10025-68-0) :

IUPAC Name: chloroselanyl selenohypochlorite 
Molecular Weight: 228.826 g/mol
Molecular Formula: Cl₂Se₂ 
Density: 2.73 g/mL at 25 °C(lit.)
Melting Point: -85 °C
Boiling Point: 127 °C
Flash Point: 127 °C
Sensitive: moisture sensitive
Merck: 14.8432 
Exact Mass: 229.770749
MonoIsotopic Mass: 229.770749
Heavy Atom Count: 4
Complexity: 6
Canonical SMILES: Cl[Se][Se]Cl
InChI: InChI=1S/Cl2Se2/c1-3-4-2
InChIKey: VIEXQFHKRAHTQS-UHFFFAOYSA-N
EINECS: 233-037-8

 Selenium monochloride (CAS NO.10025-68-0) is used in electronics, instrumentation and other industrial.

Selenium and its compounds are on the Community Right-To-Know List.

Selenium compounds are poisons. Explosive reaction with potassium. Reacts to form an explosive product with trimethylsilyl azide. Violent reaction with potassium dioxide; sodium peroxide. Vigorous or Incandescent reaction with aluminum (above 80°C); sodium + heat. When heated to decomposition it emits toxic fumes of Se and Cl⁻. See also SELENIUM COMPOUNDS and CHLORIDES.
Hazard Codes: T
Risk Statements: 23/24/25-34 
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed. 
R34:Causes burns.
Safety Statements: 22-26-36/37/39-45 
S22:Do not breathe dust. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR: UN 2922 8/PG 2
WGK Germany: 3
RTECS: VS7855000
HazardClass: 8
PackingGroup: II

OSHA PEL: TWA 0.2 mg(Se)/m³
ACGIH TLV: TWA 0.2 mg(Se)/m³
DFG MAK: 0.1 mg(Se)/m³

 Selenium monochloride (CAS NO.10025-68-0) is also called Diselenium dichloride ; Selenium chloride . Selenium monochloride (CAS NO.10025-68-0) is high toxic. It is not flammable. It will produce highly toxic hydrogen selenide gas by heat and water. So the storage environment should be ventilate, low-temperature and dry. Keep Selenium monochloride (CAS NO.10025-68-0) separate from raw materials of food and acid.