2,4,5-T (Silvex) was responsible for the problems in Agent Orange.
Agent Orange was a 50/50 mix of 2,4-D (Still widely used in products like Weed-B-Gon) and 2,4,5-T.
The problem with 2,4,5-T is that it has been found that it cannot be produced without producing TCDD (Dioxin) as a side-reaction and it is always present as a contaminant on the 2,4,5-T.
Hence 2,4,5-T was banned.
I know someone that still has several cans of the "old" formula "Weed-B-Gon" that is exactly the same as Agent Orange. That stuff was discontinued in like 1978 once they figured out the issue with 2,4,5-T and Dioxin contamination.

Now Weed-B-Gon is just largely 2,4-D with some other additives.
Naturally Enviro-WHACKOS want to ban 2,4-D as well as almost all other useful chemicals.

By the way, I LIIIIIKE both Hydrazine and Aniline.
Aniline makes an amazing octane-raising effect in Gasoline.
My Corvette likes Klotz Octane Booster Concentrate which is Aniline based. 1 pint in 18 Gallons of 93 octane makes it 103 octane.

__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !