[Zeonard]

I am performing a reaction that uses this compound; it is a liquid at room temp.  The bottle it comes in has no septum, it's open mouth after you unscrew the lid.  Whenever I've used aldehydes, I always distill them (if they're liquid at room temp). 

You think it is necessary to distill this compound?  I ask because it is an especially hazardous compound (at least according to the bottle).

[TheUnassuming]

I've never used this particular isocynate, but others I've used straight out of the bottle with little to no problem. 

[Senobim]

I've used butyl isocyanate straight out of the bottle dozens of times. Works like a charm!