Cyclohexa-1,4-diene

Chemical Name: Cyclohexa-1,4-diene
IUPAC NAME: Cyclohexa-1,4-diene
CAS No.: 628-41-1
EINECS: 211-043-1
Molecular Formula: C₆H₈
Molecular Weight: 80.13 g/mol
Melting Point: -49.2 °C
Density: 0.861 g/cm³
Boiling Point: 85.5 °C at 760 mmHg
Storage temp.: 0-6°C
Following is the structure of 1,4-Cyclohexadiene (CAS No.628-41-1):

The chemical synonymous of 1,4-Cyclohexadiene (CAS No.628-41-1) are 1,4-Cyclohexadiene ; 1,4-Dihydrobenzene ; Cyclohexa-1,4-diene ; 1,4-Cyclohexadiene, stab. ; 1,4-Cyclohexadiene, standard for gc, sta b. ; 1,4-Cyclohexadiene,97%stab.with0.1%hydroquinone ; 1,4-Cyclohexadiene, stabilized, 97% ; 1,4-Cyclohexanediene

A very dangerous fire hazard when exposed to heat, flame, or oxidizers. When heated to decomposition it emits acrid smoke and fumes.
Hazard Codes: F T
Risk Statements about 1,4-Cyclohexadiene (CAS No.628-41-1):
R11:Highly flammable. 
R45:May cause cancer. 
R46:May cause heritable genetic damage.
Safety Statements about 1,4-Cyclohexadiene (CAS No.628-41-1):
S16:Keep away from sources of ignition. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S53:Avoid exposure - obtain special instructions before use.
Attention:
1. Storage: Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
2. Handling: Avoid ingestion and inhalation. Avoid contact with eyes, skin, and clothing. Wash thoroughly after handling. Use only in a well ventilated area. 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.

1,4-Cyclohexadiene (CAS No.628-41-1) is a highly flammable cycloalkene that occurs as a colorless clear liquid.It may be prepared from benzene using lithium or sodium in liquid ammonia, this process being known as a Birch reduction. However it is easily oxidised to benzene, the driving force being the formation of an aromatic ring. The conversion to an aromatic system may be performed in the laboratory using an alkene such as styrene, along with a hydrogen transfer agent such as palladium metal supported on charcoal.