Calcium Hydroxide

Calcium Hydroxide molecular structurePubChem

adults • Skin contact product

Check for Different Age (6 available)

Is this safe for adults to use Calcium Hydroxide?

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USE WITH CAUTION
Danger Score: 4 (Lower is safer)
Quick Answer: Calcium Hydroxide use with caution for adults when used in topical products. Adults generally have higher tolerance.

ℹ️General Overview

For adults, calcium hydroxide used on the skin is moderately safe but can cause irritation. It is often allowed in products only at limited strengths and when carefully formulated to avoid harming the skin or eyes.

✅What to Do

If you are an adult using a product that lists calcium hydroxide: do a small patch test first on normal, unbroken skin; avoid using it near your eyes, mouth, or mucous membranes; do not apply to cuts or broken skin; avoid inhaling any dust or powder form; choose products from reputable brands that list ingredient concentrations or state compliance with cosmetic safety rules; stop use if you get redness, burning, or swelling and rinse the area with water.

⚠️Warnings

Watch for skin, eye, or breathing irritation — calcium hydroxide is classified as an irritant in chemical safety references (Pocket Guide to Chemical Hazards). It is also restricted or limited in cosmetics under regulatory guidance (Cosmetic Ingredient Review and the EU Cosmetics Directive), meaning safe use depends on concentration and how a product is made. If you see strong stinging, eye contact, facial swelling, difficulty breathing, or chemical burns, rinse thoroughly and seek medical care right away. Keep products containing this ingredient out of reach of children.

Confidence: MEDIUM

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Safety Risk Labels

This ingredient has the following documented risks:

Irritant: Authoritative safety guides list calcium hydroxide as an irritant to skin, eyes, and lungs. A chemical-hazards pocket guide classifies it as an eye/skin/lung irritant, a U.S. medical toxicology source reports evidence of skin irritation, and an industry safety panel says it can cause irritation unless used at limited concentrations. For a baby, that means this ingredient can cause redness, stinging, or rashes on delicate skin or damage if it gets in the eyes.
Asthma: Chemical-hazard guidance specifically calls out lung irritation from calcium hydroxide. Because it can irritate the lungs, it can make breathing problems or asthma worse in children if inhaled or if fine dust/aerosols reach the airways.
Banned: Regulatory sources for cosmetics show use and concentration limits for calcium hydroxide and recommend restrictions. The EU Cosmetics Directive / Cosing records restrictions and the industry review panel says it is only safe when formulated to avoid irritation. These rules mean some countries or product standards limit or prohibit its use in cosmetics.

Tap or hover over labels to see detailed risk information.

Alternative Names for Calcium Hydroxide

This ingredient may also be listed as:

limewatercalcium hydroxideCALCIUM HYDROXIDELIME WATERCALVITBIOCALCSUPER MICROSTARCALCIUM 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 STANDARDCALCIUM HYDROXIDE, VETEC(TM) REAGENT GRADE, 95%CALCIUM HYDROXIDE, 99.995% TRACE METALS BASISCALCIUM HYDROXIDE, PURISS. P.A., REAG. PH. EUR., >=96%

Always check ingredient labels carefully, as ingredients may be listed under different names.

Products Containing Calcium Hydroxide

This ingredient is found in the following products:

This list shows products that contain Calcium Hydroxide or its alternative names.

Common Questions About Calcium Hydroxide

Is this safe for adults to use Calcium Hydroxide?

Use caution with Calcium Hydroxide for adults. Some safety concerns have been identified.

What are the irritant risks of Calcium Hydroxide for adults?

Can cause skin redness, itchiness, or rashes—especially on sensitive baby skin.

What are the asthma risks of Calcium Hydroxide for adults?

Can make breathing issues like asthma worse in babies and kids.

What are the banned risks of Calcium Hydroxide for adults?

Banned or heavily restricted in one or more countries.

What products contain Calcium Hydroxide?

Calcium Hydroxide is commonly found in skincare products, cosmetics, and topical applications. Always check ingredient labels before use.

When can adults using products with Calcium Hydroxide?

The appropriate age depends on the specific ingredient properties and concentration. This analysis is for adults. Use the age selector above to check other ages.

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