Study of the physical and chemical properties of various types of solid soaps traded in the Libyan market \

الملخص EN

This study included the study of some physical and chemical properties of some samples of the solid soaps circulating in the Libyan market.

These characteristics were as following : the percentage of moisture, the percentage of fatty matter, the percentage of total fatty matter, the percentage free caustic alkali, the percentage of total alkali , the percentage of chloride, the acidic function pH, the refractive index R.I, and the electrical conductivity EC.

Values of the moisture content was ranged from 3.6% to 7.8%, the total fatty matter rounded in range 61.1% to 88%, the free caustic alkali was presented in region of 0.01% to 0.15%, total alkali ranged between 0.039% and 0.058%, the percentage of chloride ranged between 0.67% and 1.4% and pH was recorded between 6.29 to10.16.

Finally, the values of refractive index was 1.29 as the lowest value and 2.5 as the highest value, and the electrical conductivity recorded between 324μs to 756μs.