Molecular Structure of 1-Butanethiol,2-methyl- (CAS NO.1878-18-8):

IUPAC Name: 2-Methylbutane-1-thiol
Empirical Formula: C₅H₁₂S
Molecular Weight: 104.2138
Freely Rotating Bonds: 3
Polar Surface Area: 25.3 Å²
Index of Refraction: 1.439
Molar Refractivity: 33.06 cm³
Molar Volume: 125.4 cm³
Surface Tension: 24.8 dyne/cm
Density: 0.83 g/cm³
Flash Point: 19.4 °C
Enthalpy of Vaporization: 33.86 kJ/mol
Boiling Point: 114.8 °C at 760 mmHg
Vapour Pressure: 23.2 mmHg at 25 °C
FEMA: 3303
Storage temp: Flammables area
Sensitive: Air Sensitive
EINECS: 217-515-3
Product Categories: thiol Flavor; Alphabetical Listings; Flavors and Fragrances; M-N; Organic Building Blocks; Sulfur Compounds; Thiols/Mercaptans

Safety Information of 1-Butanethiol,2-methyl- (CAS NO.1878-18-8):
Hazard Codes: F,Xi,Xn
Risk Statements: 11-36/37/38-20/21/22
R11:Highly flammable. 
R36/37/38:Irritating to eyes, respiratory system and skin. 
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed.
Safety Statements: 16-26-33-36/37/39
S16:Keep away from sources of ignition. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S33:Take precautionary measures against static discharges. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
RIDADR: UN 1111 3/PG 2
WGK Germany: 3
HazardClass: 3
PackingGroup: II

 1-Butanethiol,2-methyl- , with CAS number of 1878-18-8, can be called 2-Methyl-1-butanethio ; 2-Methyl-butane-1-thiol ; t-Amylmercaptan ; 2-Methyl-1-butanethiol ; 2-Methylbutyl mercaptan ; 2-Methylbutanethiol . It is a clear colourless liquid.