This monograph comprises four chapters concerning formaldehyde, a colourless, flammable, strong-smelling chemical and an essential component in many manufacturing industries. Chapter 1 explicates the synthesis of diaminodiphenyl sulphone bisbenzoxazine by three step process and the synthesis of bisphenol-S bisbenzoxazine by solvent method. Chapter 2 remarks on the substantial growth trajectory of formaldehyde, examining the potential health-related effects associated with its rise in popularity and discussing how nanotechnological advancement may play a future role in mitigating the chemical's harmful impact. Chapter 3 discusses the growth and development of doped nanostructure materials by using hydrothermal method in alkaline phase, concluding that the prepared doped nanomaterial could be implemented in a broad scale for efficient electro-chemical sensor applications for environmental and healthcare fields. Chapter 4 describes the production of reinforcing rubber products, specifically tires, using rubber compounded with methylene acceptor and methylene donor.