- Products with this ingredient are allowed for use in EWG VERIFIED but must meet use restrictions and warnings based on EWG review of company data.
- Products with the EWG VERIFIED mark have met use restrictions and warnings based on EWG review of company data.
- This ingredient’s score is lower when used as a saponification agent (e.g., soaps and cleansers)
Other ConcernsUse restrictions (high), Non-reproductive organ system toxicity (moderate), and Irritation (skin, eyes, or lungs) (low)
SYNONYMSCAUSTIC SODA, CAUSTIC SODA; SODIUM HYDROXIDE; SODIUM HYDROXIDE, SODIUM HYDRATE, SODIUM HYDROXIDE, SODIUM HYDROXIDE (NA(OH)), and SODIUM HYDROXIDE SOLUTION
Restricted: EWG VERIFIED products cannot contain this ingredient without adequate substantiation
Sodium Hydroxide is a highly caustic and reactive inorganic base.
See how this product scores for common concerns.
LOWAllergies & Immunotoxicity
LOWDevelopmental and Reproductive Toxicity
- DATA SOURCES
Products with this Ingredient
|facial moisturizer/treatment||439 products|
|bar soap||356 products|
|body wash/cleanser||299 products|
|facial cleanser||263 products|
|serums & essences||219 products|
|hand cream||130 products|
|daily use with SPF||102 products|
|recreational sunscreen||96 products|
|around-eye cream||95 products|
|liquid hand soap||93 products|
|hair treatment/serum||91 products|
|hair color and bleaching||78 products|
|eye shadow||55 products|
|body firming lotion||54 products|
|tooth whitening||47 products|
|baby lotion||47 products|
|makeup remover||46 products|
|eye liner||44 products|
|hair styling aide||44 products|
|styling gel/lotion||42 products|
|makeup primer||41 products|
|shaving cream||36 products|
|after shave||28 products|
|shaving cream (men's)||25 products|
|foot moisturizer||24 products|
|baby shampoo||22 products|
|bubble bath||22 products|
|after sun product||22 products|
|hand sanitizer||22 products|
|BB cream||20 products|
|brow liner||19 products|
|antiperspirant/deodorant (men's)||16 products|
|setting powder/spray||15 products|
|baby soap||14 products|
|hair spray||13 products|
|body spray||13 products|
|bath oil/salts/soak||12 products|
|skin fading/lightener||10 products|
|sunless tanning||10 products|
|styling mousse/foam||9 products|
|damaged skin treatment||8 products|
|beard care||7 products|
|baby wipes||6 products|
|hair-loss treatment||6 products|
|baby sunscreen||6 products|
|foot cleansing||5 products|
|oil controller||5 products|
|eye makeup remover||5 products|
|foot odor control||5 products|
|baby oil||4 products|
|body oil||4 products|
|nail treatment||3 products|
|muscle/joint soreness||3 products|
|hair relaxer||3 products|
|other eye makeup||3 products|
|cuticle treatment||2 products|
|fragrance for women||1 products|
|depilatory (men's)||1 products|
|baby bubble bath||1 products|
|lip balm||1 products|
|lip plumper||1 products|
|hair removal waxes||1 products|
|lip gloss||1 products|
|fragrance for men||1 products|
|beard cleanser||1 products|
|body art||1 products|
|baby toothpaste||1 products|
|pore strips||1 products|
|Violation of industry recommendations - Restricted in cosmetics; use, concentration, or manufacturing restrictions - Avoid or minimize skin exposure: recommendation from industry safety panel (Cosmetic Ingredient Review, CIR)||Cosmetic Ingredient Review Assessments|
|Restricted in cosmetics (recommendations or requirements) - use, concentration, or manufacturing restrictions - any||CosIng|
|Determined safe for use in cosmetics, subject to concentration or use limitations - Safe for use in cosmetics with some qualifications||Cosmetic Ingredient Review Assessments|
Organ system toxicity (non-reproductive)
|Classified as expected to be toxic or harmful||Environment Canada Domestic Substance List|
|Classified as medium human health priority||Environment Canada Domestic Substance List|
|Single case study detailing occupational hazards||National Library of Medicine HazMap|
|Occupational hazards related to handling||CPS&Q - Classification & Labelling|
|Not suspected to be an environmental toxin||Environment Canada Domestic Substance List|
Persistence and bioaccumulation
|Not suspected to be bioaccumulative||Environment Canada Domestic Substance List|
|Industry or government recommendations for safe use: restrictions on concentration, impurities, product types, or manufacturing methods - Avoid or minimize skin exposure: recommendation from industry safety panel (Cosmetic Ingredient Review, CIR)||Cosmetic Ingredient Review Assessments|
Multiple, additive exposure sources
|Designated as safe for general or specific, limited use in food||FDA Food Additive Status|
|Designated as safe for general or specific, limited use in food||FDA Everything Added to Food|
|7043 studies in PubMed science library may include information on the toxicity of this chemical||NLM PubMed|
- CIR (Cosmetic Ingredient Review). 2006. CIR Compendium, containing abstracts, discussions, and conclusions of CIR cosmetic ingredient safety assessments. Washington DC.
- European Commission. 2013. Cosing, the European Commission database with information on cosmetic substances and ingredients. Accessed on March 1, 2013 at http://ec.europa.eu/consumers/cosmetics/cosing/ .
- EC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
- NLM (National Library of Medicine). 2006. HazMap — Occupational Exposure to Hazardous Agents.
- CPS&Q (Consumer Products Safety & Quality) formely known as ECB (European Chemicals Bureau). 2008. Classification and Labelling: Chemicals: Annex VI of Directive 67/548/EEC through the 31st ATP.
- FDA (U.S. Food and Drug Administration) 2006. Food Additive Status List. Downloaded from http://www.cfsan.fda.gov/%7Edms/opa-appa.html, Oct 16, 2006.
- FDA (U.S. Food and Drug Administration). 2008. EAFUS [Everything Added to Food]: A Food Additive Database. FDA Office of Food Safety and Applied Nutrition.
- NLM (National Library of Medicine). 2012. PubMed online scientific bibliography data. http://www.pubmed.gov.
Cosmetics and personal care products are not required to be tested for safety before being allowed on the market. The Skin Deep® scoring system was designed to help the public understand whether a product is safe to use or whether it contains ingredients of concern.
Every product and ingredient in Skin Deep gets a two-part score – one for hazard and one for data availability. The safest products score well by both measures, with a low hazard rating and a fair or better data availability rating.HOW WE DETERMINE SCORES
The Skin Deep ingredient hazard score, from 1 to 10, reflects known and suspected hazards linked to the ingredients. The EWG VERIFIED™ mark means a product meets EWG’s strictest criteria for transparency and health.
The Skin Deep data availability rating reflects the number of scientific studies about the product or ingredient in the published scientific literature.