What chemicals are in hair dye?

Some of the most common and dangerous ingredients used in hair dyes are;

ammonia,

peroxide,

p-phenylenediamine,

diaminobenzene,

toluene-2,5-diamine,

resorcinol etc.

Explanation:

there is no

pitch- the definition of pitch is as follows:

"the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone."