Butyl methyl ether (dot) ,its register number is 628-28-4,it's also named as 1-Methoxy-butan ; alpha-Methoxybutane ; Butane,1-methoxy- ; Ether, butyl methyl ; Ether,butylmethyl ; Methyl butyl ether ; Methylbutylether ; 1-Methoxybutane ,and so on. Butyl methyl ether (dot) (CAS No.628-28-4) is usually clear liquid.

IUPAC Name: 1-Methoxybutane
CAS: 628-28-4
Molecular Formula: C₅H₁₂O
Molecular Weight: 88.15
Molecular structure:
EINECS: 211-033-7
Melting point:  −115 °C(lit.)
ACD/LogD (pH 5.5): 1.51 
ACD/LogD (pH 7.4): 1.51 
ACD/BCF (pH 5.5): 8.31 
ACD/BCF (pH 7.4): 8.31 
ACD/KOC (pH 5.5): 158.44 
ACD/KOC (pH 7.4): 158.44 
H bond acceptors: 1 
H bond donors: 0 
Freely Rotating Bonds: 3 
Index of Refraction: 1.376 
Molar Refractivity: 26.95 cm³ 
Molar Volume: 117.4 cm³ 
Polarizability: 10.68 10^-24cm³ 
Surface Tension: 20.7 dyne/cm 
Density: 0.75 g/cm³ 
Enthalpy of Vaporization: 29.95 kJ/mol 
Boiling Point: 70.9 °C at 760 mmHg 
Vapour Pressure: 137 mmHg at 25°C 

 Butyl methyl ether (dot) (CAS No.628-28-4) commonly used as solvent, anesthetics, and aslo used for organic synthesis.

RTECS:  KN5240000

Poison by inhalation. A flammable liquid. When heated to decomposition it emits acrid smoke and irritating vapors.

Hazard Codes:  F
Risk Statements:  11-19 (R11:Highly flammable. R19:May form explosive peroxides.)
Safety Statements:  16-23 (S16:Keep away from sources of ignition. S23:Do not breathe vapour.)
RIDADR:  UN 2350 3/PG 2
WGK Germany:  3
F:  10-23
HazardClass:  3.1
PackingGroup:  II

DOT Classification:  3; Label: Flammable Liquid

Removal in wastewater treatment of Butyl methyl ether (dot) (CAS No.628-28-4) can be stated as follows:
Total removal:43.03  percent
Total biodegradation:0.06  percent
Total sludge adsorption:1.27  percent
Total to Air:41.70  percent
(using 10000 hr Bio P,A,S)