Isotope-239 Igniting Agent

 is a miscellaneous item in Fallout: New Vegas.

Characteristics
Isotope-239 igniting agent is a fuel used for the rockets at REPCONN. You can find it in the rocket toys for sale in NOVAC. Around 500 free ones are in the closet in dinky, along with 100's of T-Rex toys.

It can also be found on a man in a space suit that has been killed by a scorpion (more details required).