{"title":"Sodium hydroxide","description":"\u003ch2\u003e\n\u003cimg height=\"129\" width=\"129\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0253\/1337\/8394\/files\/image-fiole_a1931df7-641c-4b81-b676-cd0878bf0ee1_480x480.png?v=1666174257\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0253\/1337\/8394\/files\/image-fiole_a1931df7-641c-4b81-b676-cd0878bf0ee1_480x480.png?v=1666174257\" data-mce-fragment=\"1\"\u003e\u003cbr\u003e \u003cbr\u003eSodium hydroxide\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"hero\"\u003e\n\u003cdiv class=\"hero-content\"\u003e\n\u003cp\u003eIf citric acid is yin, sodium hydroxide is yang. A cosmetic product must have an acidity comparable to the area of application for which it is intended. Acidity is measured by an indicator called pH. The skin has an acidic pH, of around 5.5. Any product intended to be used on the skin must therefore have a similar pH, around 5.5. To adjust the acidity, two substances are available: citric acid, which decreases the pH, and sodium hydroxide (sometimes called soda), which increases the pH. It is the right quantitative combination of the two that allows for obtaining the target value.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","products":[],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0253\/1337\/8394\/collections\/image-fiole_38820a36-2bf6-45e4-9c72-592db2f8a1ac.png?v=1689670721","url":"https:\/\/www.monsieurbarbier.com\/en\/collections\/sodium-hydroxide.oembed","provider":"Monsieur BARBIER","version":"1.0","type":"link"}