Hydrophilic petrolatum ●●●●● ●●●● ●●0 Hydrophilic petrolatum, USP has the following formula for the preparation of 1000 g Cholesterol 30g Stearyl alcohol(硬脂醇)30g White wax 80g White petrolatum 860 It is prepared by melting the stearyl alcohol and the white wax on a steam bath, adding the cholesterol with stirring until dissolved, adding the white petrolatum and allowing the mixture to cool while being stirred until congealed(凝结)
Hydrophilic petrolatum Hydrophilic petrolatum, USP has the following formula for the preparation of 1000 g: Cholesterol 30 g Stearyl alcohol（硬脂醇） 30 g White wax 80 g White petrolatum 860 g It is prepared by melting the stearyl alcohol and the white wax on a steam bath, adding the cholesterol with stirring until dissolved, adding the white petrolatum and allowing the mixture to cool while being stirred until congealed（凝结）
●●●●● ●●●● ●●0 ●●● Lanolin ●●●● obtained from the wool of sheep; is a purified, wax-like substance that has been cleaned deodorized and decolorized It contains not more than 0.25% water Additional water may be incorporated into lanolin by mixing
Lanolin obtained from the wool of sheep; is a purified, wax-like substance that has been cleaned, deodorized, and decolorized. It contains not more than 0.25% water. Additional water may be incorporated into lanolin by mixing
●●●●● ●●●● 3)Water-removable bases ●●0 ●●● ●●●● Water-removable bases are oil-in-water emulsions resembling creams in appearance. Because the external phase of the emulsion is aqueous, they are easily washed from skin and are often called water washable bases They may be diluted with water or aqueous solutions
3) Water-removable bases Water-removable bases are oil-in-water emulsions resembling creams in appearance. Because the external phase of the emulsion is aqueous, they are easily washed from skin and are often called ‘water washable’bases. They may be diluted with water or aqueous solutions
●●●●● Hydrophilic ointment ●●●● ●●0 ●●● ●●●● Hydrophilic ointment has the following formula for the preparation of about 1000 g Methylparaben 025g Propyl paraben 015g Sodium lauryl sulfate〔月桂醇硫酸钠)10g Propylene glycol(丙二醇) 120 Stearyl alcohol 250g White petrolatum 250 Purified water 370g
Hydrophilic ointment Hydrophilic ointment has the following formula for the preparation of about 1000 g: Methylparaben 0.25g Propylparaben 0.15g Sodium lauryl sulfate（月桂醇硫酸钠） 10g Propylene glycol（丙二醇） 120g Stearyl alcohol 250g White petrolatum 250g Purified water 370g
●●●●● ●●●● ●●0 ●●● ●●●● In preparating the ointment, the stearyl alcohol and white petrolatum are melted together at about 75C. The other agents, dissolved in the purified water, are added with stirring until the mixture congeals
In preparating the ointment, the stearyl alcohol and white petrolatum are melted together at about 75C. The other agents, dissolved in the purified water, are added with stirring until the mixture congeals