T-Stoff was hydrogen peroxide and C-Stoff was a mixture of hydrazine hydrate, methanol and water.
There are a lot of popular myths that surround the 163 that are untrue or blown way out of proportion. If you want to learn about which are true and which are false, I would suggest looking at
this book. Though Amazon lists it as not being published yet, I havfe a copy sitting here on my lap. It is a very good book and full of developmental details and its introduction into service with Erprobungskommando 16 and JG 400. Volume 2 will be coming out in the near future and will probably detail its further testing, development and operations through the ensd of the war and beyond.
It is very interesting reading and highly recommended if you can find it or have any interest in this plane.