The Butane, 1,4-difluoro- is an organic compound with the formula C₄H₈F₂. With the CAS registry number 372-90-7, the IUPAC name of this chemical is 1,4-difluorobutane. When you are using it, do not breathe gas/fumes/vapour/spray (appropriate wording to be specified by the manufacturer) and avoid contact with skin and eyes.

Physical properties about Butane, 1,4-difluoro- are: (1)ACD/LogP: 1.43; (2)ACD/LogD (pH 5.5): 1.43; (3)ACD/LogD (pH 7.4): 1.43; (4)ACD/BCF (pH 5.5): 7.2; (5)ACD/BCF (pH 7.4): 7.2; (6)ACD/KOC (pH 5.5): 143.03; (7)ACD/KOC (pH 7.4): 143.03; (8)#Freely Rotating Bonds: 3; (9)Index of Refraction: 1.319; (10)Molar Refractivity: 20.9 cm³; (11)Molar Volume: 105.4 cm³; (12)Polarizability: 8.28×10^-24cm³; (13)Surface Tension: 15.8 dyne/cm; (14)Density: 0.892 g/cm³; (15)Enthalpy of Vaporization: 30.74 kJ/mol; (16)Boiling Point: 80 °C at 760 mmHg; (17)Vapour Pressure: 96.5 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)SMILES: FCCCCF
(2)InChI: InChI=1/C4H8F2/c5-3-1-2-4-6/h1-4H2
(3)InChIKey: CXHPKSYTQFAXIN-UHFFFAOYAS
(4)Std. InChI: InChI=1S/C4H8F2/c5-3-1-2-4-6/h1-4H2
(5)Std. InChIKey: CXHPKSYTQFAXIN-UHFFFAOYSA-N

The toxicity data is as follows: