Helpful how-tos and reviews from Marta and friends. Sodium hydroxide is approved for use in cosmetics and personal care products in varying concentrations: 5% by weight in nail cuticle solvents, 2% by weight in hair straighteners for general use, 4.5% by weight in hair straighteners for professional use, up to a pH 12.7 in depilatories, and up to pH 11 in other uses as a pH adjuster. The United States Food and Drug Administration (FDA) has approved sodium hydroxide as GRAS (Generally Recognized as Safe) as a direct food additive. Concentrated sodium hydroxide is a strong irritant and corrosive to the skin, eyes, respiratory tract, and gastrointestinal system if ingested. It is also a popular ingredient in industrial solvents as a chemical base for soaps, oven cleaners, detergents and drain cleaners because of its ability to dissolve grease, oils, fats and protein based deposits, according to Wikipedia. Lower pH means a higher concentration of H, The formula for calculating pH is pH = -log. Sodium hydroxide is used to saponify oils, meaning that it allows oils to lather and foam in soaps and cleansers. However, it is primarily used in the washing and chemical peeling of produce. As sodium hydroxide is highly basic it is caustic, making it a great product to clean drains and strip away grease and grime. In fact, a study on skin products found that using an alkaline cleanser, even once, can do significant damage to the skin as an alkaline cleanser disrupts the skin’s acid mantle. The Science (video with KindofStephen), Tranexamic acid: a newer skincare ingredient for pigmentation, « Activated Charcoal in Skincare: The Science, Gift Ideas for a Good Cause From The Body Shop », Purging vs Breakouts: When to Ditch Your Skincare, Easy (5 Minute) DIY Vitamin C Serum Recipe, My Routine for Starting on Tretinoin (Retin-A) Cream. However, it is primarily used in the washing and chemical peeling of produce. On one hand, if a product is too acidic it may irritate the skin or cause a stinging sensation. Who is it for?All skin types except those that have an identified allergy to it. the not so good:Sodium hydroxide is highly caustic but it is usually fully used up in the process. Keep an eye on:There are many other uses of sodium hydroxide, including dye, drain cleaner, soaps, nail products and makeup. Your email address will not be published. Those of lesser concentrations could take as long as several hours before a burn occurs. Sodium Hydroxide is FDA approved, and has received the GRAS (Generally Recognized as Safe) rating as a direct food additive. Acute Exposure. However, it is primarily used in the washing and chemical peeling of produce.Concentrated sodium hydroxide is a strong irritant and corrosive to the skin, eyes, respiratory tract, and gastrointestinal system if ingested. No part of this blog may be reproduced or transmitted in any form or by any means without written permission from the author, except for brief quotations when accompanied by a citation and link. It is classified as "expected to be toxic or harmful" and one or more animal studies show brain and nervous system, metabolic, and sense organ effects at very low doses and there are warnings regarding using this ingredient around the eyes or mouth.

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