Chemistry informtion about 2,3-Dibromobutane (CAS NO.5408-86-6) is:
IUPAC Name: 2,3-Dibromobutane
Synonyms: 2,3-Dibromo-Butan ; 2,3-Dibromobutane,Mixtureof(+/-)Andmeso ; Beta-Butylene Bromide ; (+/-)-2,3-Dibromobutane ; 2,3-Dibromobutane ; 2-Butylene Bromide ; 2,3-Dibromobutane, 99%, Mixture Of (+/-) And Meso ; 2,3-Dibromobutane, 97+%
MF: C₄H₈Br₂
MW: 215.91
EINECS: 226-476-1 
Density: 1.774 g/cm³
Flash Point: 33 °C
Boiling Point: 161 °C at 760 mmHg
Enthalpy of Vaporization: 38.12 kJ/mol
Vapour Pressure: 3.02 mmHg at 25°C
Refractive Index: n20/D 1.5126(lit.)
BRN: 1718916
Stability: Stable. Incompatible with strong oxidizing agents. Combustible.
Following is the molecular structure of 2,3-Dibromobutane (CAS NO.5408-86-6) is:

Safty information about 2,3-Dibromobutane (CAS NO.5408-86-6) :
Hazard Codes:
Xn: Harmful
Xi: Irritant
Risk Statements:
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed.  
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements:
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.  
S37/39:Wear suitable gloves and eye/face protection. 
RIDADR: 2810
WGK Germany: 3
HazardClass: 6.1(b)
PackingGroup: III

 2,3-Dibromobutane (CAS NO.5408-86-6) is a colourless liquid. To protect yourself ,you can take eyeshields, faceshields, full-face respirator (US), gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter and so on.
First Aid Measures:
Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin: Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion: Get medical aid. Wash mouth out with water.
Inhalation: Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. 
Handling and Storage:
Handling: Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.
Storage: Store in a cool, dry place. Store in a tightly closed container.