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HOW WE DETERMINE SCORES Learn more About EWG VERIFIED®

Data: Fair

Calcium Hydroxide

  • 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.
  • This ingredient's score is higher if used in product forms that are inhalable (e.g., sprays, powders) because of respiratory concerns. The score is lower if used in product forms that have lower risk of inhalation (e.g., solids, liquids)
  • This ingredient's score is higher if used in products that may not meet industry safety guidelines or U.S. and international government requirements. The score will be lower if used in products that meet these safety guidelines and requirements.

IMAGE SOURCE: PubChem

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Other Concerns

Use restrictions (high) and Irritation (skin, eyes, or lungs) (high)

SYNONYMS

● LIME WATER
● CALVIT
● BIOCALC
● SUPER MICROSTAR
● CALCIUM HYDROXIDE, PURISS., MEETS ANALYTICAL SPECIFICATION OF PH. EUR., USP, FCC, 95-100.5% (COMPLEXOMETRIC)
● CALCIUM HYDROXIDE, SAJ SPECIAL GRADE, >=96.0%
● CALCIUM HYDROXIDE, UNITED STATES PHARMACOPEIA (USP) REFERENCE STANDARD
● CALCIUM HYDROXIDE, VETEC(TM) REAGENT GRADE, 95%
● CALCIUM HYDROXIDE, 99.995% TRACE METALS BASIS
● CALCIUM HYDROXIDE, PURISS. P.A., REAG. PH. EUR., >=96%

Restricted

Restricted: EWG VERIFIED products cannot contain this ingredient without adequate substantiation

Calcium Hydroxide is an inorganic base.

Common concerns

See how this product scores for common concerns.

  • LOW
    Cancer
  • LOW
    Allergies & Immunotoxicity
  • LOW
    Developmental and Reproductive Toxicity
  • HIGH
    Use Restrictions

Ingredient concerns

  • CONCERNS
  • DATA SOURCES

Products with this Ingredient

Expand content Collapse content
styling gel/lotion1 products
depilatory50 products
conditioner3 products
hair relaxer12 products
facial cleanser6 products
shaving cream8 products
hair removal waxes3 products
depilatory (men's)2 products
Preshave Preparations1 products
shaving cream (men's)6 products
diaper cream4 products
mask5 products
baby lotion1 products
baby soap2 products
facial moisturizer/treatment3 products
moisturizer2 products
hair treatment/serum3 products
exfoliant/scrub1 products
serums & essences1 products
lip balm2 products
shampoo1 products
lipstick1 products
hair styling aid1 products
body firming lotion1 products

Irritation (skin, eyes, or lungs)

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CONCERN REFERENCE
Classified as eye, skin, lung irritantPocket Guide to Chemical Hazards, Calcium Hydroxide(2012-01-01)
Limited evidence of skin irritationUS National Library of Medicine,
skin/eye/lung irritation - weight of evidence unknown/unassessedCosmetic Ingredient Review (CIR)

Use restrictions

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CONCERN REFERENCE
Restricted in cosmetics (recommendations or requirements) - use, concentration, or manufacturing restrictions - skinCosmetics Directive, Cosing(2000-01-01)
Recommended restricted in cosmetics - use, concentration, or manufacturing restrictions - Cosmetics Directive, Cosing(2000-01-01)
Violation of government restrictions - Restricted in cosmetics; use, concentration, or manufacturing restrictions - anyEU Cosmetics Directive
Determined safe for use in cosmetics, subject to concentration or use limitations - Safe for use in cosmetics with some qualificationsCosmetic Ingredient Review (CIR)
Determined safe for use in cosmetics, subject to concentration or use limitations - Determined safe for use when formulated to avoid irritation, in assessment by industry safety panel (Cosmetic Ingredient Review, CIR)Cosmetic Ingredient Review (CIR)

Multiple, additive exposure sources

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CONCERN REFERENCE
Designated as safe for general or specific, limited use in foodUS Food and Drug Administration (FDA)

Organ system toxicity (non-reproductive)

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CONCERN REFERENCE
Classified as not expected to be potentially toxic or harmfulEnvironment Canada
Classified as a low human health priorityEnvironment Canada

Persistence and bioaccumulation

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CONCERN REFERENCE
Not suspected to be bioaccumulativeEnvironment Canada

Ecotoxicology

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CONCERN REFERENCE
Not suspected to be an environmental toxinEnvironment Canada
  • Pocket Guide to Chemical Hazards, Calcium Hydroxide(2012-01-01)
  • US National Library of Medicine,
  • Cosmetic Ingredient Review (CIR)
  • Cosmetics Directive, Cosing(2000-01-01)
  • EU Cosmetics Directive
  • US Food and Drug Administration (FDA)
  • Environment Canada

Understanding scores

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

Hazard score

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.

Score legend
WEIGHT-OF-EVIDENCE APPROACH

A product’s hazard score is not an average of the ingredients’ hazard scores. It is calculated using a weight-of-evidence approach that factors in all of the hazards or health impacts associated with the ingredients.

Data availability

The Skin Deep data availability rating reflects the number of scientific studies about the product or ingredient in the published scientific literature.

NONE LIMITED FAIR GOOD ROBUST
Low Availability
Moderate Availability
High Availability
NONE

Ingredients have not been assessed.

LIMITED-FAIR

There is only a modest volume of research.

GOOD-ROBUST

Ingredients have been studied extensively.

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