Soap is an organic compound because it is derived from organic compounds. Soap is made by adding caustic soda to organic compounds. . .. CH2-OCO-R .. | CH-OCO-R ................................................ ....... CH2-OH .. | ........................................ ................... ........... | .. CH2-OCO-R + 3NaOH ---> 3R-CO-ONa + CH -OH ................................................ ...................... | .................................................. .................... CH2-OH oil or fat + caustic soda --- > soap + glycerol here R = Cn H 2n + 1 n = 12-18