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2. Foundation (cosmetics) - Wikipedia

   en.wikipedia.org/wiki/Foundation_(cosmetics)

   Foundation is a liquid, cream, or powder makeup applied to the face and neck to create an even, uniform color to the complexion, cover flaws and, sometimes, to change the natural skin tone. Some foundations also function as a moisturizer , sunscreen , astringent or base layer for more complex cosmetics .

3. Hydrochloric acid - Wikipedia

   en.wikipedia.org/wiki/Hydrochloric_acid

   Hydrochloric acid, also known as muriatic acid or spirits of salt, is an aqueous solution of hydrogen chloride (HCl). It is a colorless solution with a distinctive pungent smell. It is classified as a strong acid. It is a component of the gastric acid in the digestive systems of most animal species, including humans.

4. This anti-aging Estée Lauder SPF foundation is 40% off at ...

   www.aol.com/lifestyle/this-anti-aging-estee...

   Perfect for those who want natural-looking, medium coverage that evens skin tone and covers redness, dark spots and imperfections, Estée Lauder's Futurist formula is a great all-season foundation ...

5. Acrylic acid - Wikipedia

   en.wikipedia.org/wiki/Acrylic_acid

   Acrylic acid (IUPAC: prop-2-enoic acid) is an organic compound with the formula CH 2 =CHCOOH. It is the simplest unsaturated carboxylic acid, consisting of a vinyl group connected directly to a carboxylic acid terminus. This colorless liquid has a characteristic acrid or tart smell. It is miscible with water, alcohols, ethers, and chloroform ...

6. Acid value - Wikipedia

   en.wikipedia.org/wiki/Acid_value

   The acid number for an oil sample is indicative of the age of the oil and can be used to determine when the oil must be changed. [5] A liquid fat sample combined with neutralized 95% ethanol is titrated with standardized sodium hydroxide of 0.1 eq/L normality to a phenolphthalein endpoint. The volume and normality of the sodium hydroxide are ...

7. Acid–base extraction - Wikipedia

   en.wikipedia.org/wiki/Acid–base_extraction

   Acid–base extraction is a subclass of liquid–liquid extractions and involves the separation of chemical species from other acidic or basic compounds. [1] It is typically performed during the work-up step following a chemical synthesis to purify crude compounds [2] and results in the product being largely free of acidic or basic impurities.