Fat particles are blackheads on the face, not grease. It is acidic. Soda powder is sodium bicarbonate, which is an alkaline salt. Oil is acidic, baking soda is alkaline, and just after acid-base neutralization, fat particles are gone.

But the acid and alkali neutralized and destroyed the skin. It is equivalent to treating the face as a reaction container, and a violent chemical reaction took place on the face. Therefore, it is not recommended to use baking soda to remove fat particles.

Extended data:

Sodium bicarbonate, chemical formula NaHCO? Commonly known as baking soda. White fine crystal, more insoluble in water than sodium carbonate. It is also an industrial chemical. Solids above 50℃ begin to decompose gradually to produce sodium carbonate, carbon dioxide and water, and completely decompose at 270℃.

Sodium bicarbonate is an acid salt formed by neutralization of strong alkali and weak acid, which is weakly alkaline when dissolved in water. This characteristic can make it a leavening agent in food production. Sodium carbonate will remain after the action of sodium bicarbonate, and excessive use will make the finished product have an alkaline taste.

Sodium bicarbonate is a white crystal or a fine crystal of opaque monoclinic system. The specific gravity is 2. 15. Odorless, nontoxic, salty, soluble in water and slightly soluble in ethanol. It is soluble in 10 part of water at 25℃ and 12 part of water at about 18℃. Its aqueous solution is slightly alkaline due to hydrolysis, stable at room temperature, easily decomposed when heated, gradually decomposed above 50℃, completely lost carbon dioxide at 270℃, unchanged in dry air, and slowly deliquesced in humid air.

When used alone, it is strongly alkaline due to thermal decomposition. When used in bread, it will turn yellow and destroy the vitamins in wheat. It is best to use it with acidic substances such as calcium hydrogen phosphate. It can also be used to blanch food and remove astringency. Because it can increase the pH value, improve the water-holding capacity of protein, promote the softening of food tissues and cells, and promote the dissolution of astringent ingredients. It can remove the smell of goat milk (dosage 10 ~ 20 mg/kg). As acidity regulator and chemical leavening agent, it can be used in all kinds of foods that need leavening agent, and it can be used in proper amount according to production needs.

References:

Baidu encyclopedia-baking soda