Identify the purpose for each of the following ingredients.
a. $\mathrm{H}_{2} \mathrm{O}_{2}$
b. $\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{14} \mathrm{COONa}$
c. $\mathrm{Na}_{2} \mathrm{CO}_{3}$
d. $\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{14} \mathrm{COOCH}_{2}\left(\mathrm{CH}_{2}\right)_{28} \mathrm{CH}_{3}$