- 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.
Other ConcernsUse restrictions (high) and Irritation (skin, eyes, or lungs) (high)
SYNONYMSCALCIUM DIHYDROXIDE, CALCIUM DIHYRDROXIDE, CALCIUM HYDRATE, CALCIUM HYDROXIDE, CALCIUM HYDROXIDE (CA(OH)2), HYDRATED LIME, and LIME WATER
Restricted: EWG VERIFIED products cannot contain this ingredient without adequate substantiation
Calcium Hydroxide is an inorganic base.
See how this product scores for common concerns.
LOWAllergies & Immunotoxicity
LOWDevelopmental and Reproductive Toxicity
- DATA SOURCES
Products with this Ingredient
|shaving cream||5 products|
|diaper cream||3 products|
|baby soap||2 products|
|hair relaxer||2 products|
|hair treatment/serum||2 products|
|styling gel/lotion||1 products|
|shaving cream (men's)||1 products|
|baby lotion||1 products|
|facial moisturizer/treatment||1 products|
Irritation (skin, eyes, or lungs)
|Classified as eye, skin, lung irritant||Open scientific literature|
|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 - skin||Open scientific literature|
|Restricted in cosmetics (recommendations or requirements) - use, concentration, or manufacturing restrictions - any||CosIng|
|Recommended restricted in cosmetics - use, concentration, or manufacturing restrictions - any||Open scientific literature|
|Determined safe for use in cosmetics, subject to concentration or use limitations - Safe for use in cosmetics with some qualifications||Cosmetic Ingredient Review Assessments|
|Single case study detailing occupational hazards||National Library of Medicine HazMap|
Multiple, additive exposure sources
|Designated as safe for general or specific, limited use in food||FDA Everything Added to Food|
|Designated as safe for general or specific, limited use in food||FDA Food Additive Status|
|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|
|4364 studies in PubMed science library may include information on the toxicity of this chemical||NLM PubMed|
|Not suspected to be an environmental toxin||Environment Canada Domestic Substance List|
Organ system toxicity (non-reproductive)
|Classified as not expected to be potentially toxic or harmful||Environment Canada Domestic Substance List|
|Classified as a low human health priority||Environment Canada Domestic Substance List|
Persistence and bioaccumulation
|Not suspected to be bioaccumulative||Environment Canada Domestic Substance List|
- Open scientific/peer reviewed literature
- 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/ .
- NLM (National Library of Medicine). 2006. HazMap — Occupational Exposure to Hazardous Agents.
- 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.
- 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.
- NLM (National Library of Medicine). 2012. PubMed online scientific bibliography data. http://www.pubmed.gov.
- EC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
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.