Melting point :-67 °C
Boiling point :66-68 °C(lit.)
Density :1.605 g/mL at 25 °C(lit.)
vapor density :8 (vs air)
vapor pressure :4.42 psi ( 20 °C)
refractive index :n20/D 1.3458(lit.)
CAS DataBase Reference :303-04-8(CAS DataBase Reference)
NIST Chemistry Reference :trans-2,3-Dichloro-1,1,1,4,4,4-hexafluoro-2-butene(303-04-8)
EPA Substance Registry System :2-Butene, 2,3-dichloro-1,1,1,4,4,4-hexafluoro- (303-04-8)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501 H330 Fatal if inhaled Acute toxicity,inhalation Category 1, 2 Danger P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501
Precautionary statements:	P260 Do not breathe dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.