Report - 1,3-BUTADIENE...Verschueren, 1996) (g) Vapour pressure : 120 kPa at 0 C; 273 kPa at 25 C (Grub & Löser, 2005) (h) Relative vapour density (air = 1) : 1.87 (Verschueren, 1996) (i)

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