No it's not, i used to use it regularly, but the makers of Jeyes were made to alter the chemical make up of it a good few years back now, i'm sure it was because of safety reasons with breathing in the fumes from it.
I have been using cresol which is the same as the old type jeyes fluid, which is strong as feck you can feel it catching the back of your throat, i was paying £10 a gallon from the local feed merchants for it, but i havent had it for a while now.
SINDASOX