https://en.m.wikipedia.org/wiki/Calcium_hypochlorite
https://en.m.wikipedia.org/wiki/Trichloroisocyanuric_acid
https://en.m.wikipedia.org/wiki/Cyanuric_chloride
https://en.m.wikipedia.org/wiki/Isocyanic_acid
Synthesis
Cyanuric acid (CYA) was first synthesized by Friedrich Wöhler in 1829 by the thermal decomposition of urea and uric acid (Urine). The current industrial route to CYA entails the thermal decomposition of urea, with release of ammonia.
https://www.myrecipes.com/how-to/can-you-mix-bleach-and-vinegar
RE: Hydrogen