Moderate Cosmetic Ingredient GHS Classified

Calcium Hydroxide

INCI: CALCIUM HYDROXIDE

CAS Number
1305-62-0
Function
pH adjuster, depilatory agent, hair straightener
Safety Rating
MODERATE

Regulatory Status

🇪🇺 EU Status restricted
EU Max Conc. 7%
🇺🇸 US Status permitted
US Notes Adequate when Annex III limits are respected

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
negligible
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

GHS Hazard Classification

Globally Harmonized System classification per ECHA C&L inventory and ILO/WHO International Chemical Safety Cards.

Short-term Exposure Effects
The substance is corrosive to the eyes and skin. The substance is irritating to the respiratory tract. Medical observation is indicated.
Long-term Exposure Effects
Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged inhalation of dust particles may cause effects on the lungs.
Routes of Exposure
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

Expert Verdict

Strong alkali causing severe chemical burns and irreversible eye damage. Mandatory labeling required: Contains alkali. Avoid contact with eyes. Can cause blindness. Keep out of reach of children.

⚠️
Concern Level: High

Regulatory Flags

epa_safer_alternative fda_food_additive eu_cosing_listed jecfa_safe

Frequently Asked Questions

Is Calcium Hydroxide safe in cosmetics?

Strong alkali causing severe chemical burns and irreversible eye damage. Mandatory labeling required: Contains alkali. Avoid contact with eyes. Can cause blindness. Keep out of reach of children. The EU classifies Calcium Hydroxide as "restricted". Safety rating: MODERATE.

Is Calcium Hydroxide allowed in the EU?

Calcium Hydroxide EU regulatory status: restricted. Maximum allowed concentration: 7%. This is based on EU Regulation 1223/2009 and its amendments.

What does Calcium Hydroxide do in cosmetics?

Calcium Hydroxide functions as: pH adjuster, depilatory agent, hair straightener. It is classified as a cosmetic ingredient in our database. CAS number: 1305-62-0.

What is the Margin of Safety for Calcium Hydroxide?

not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

Compliance Tools

Check Calcium Hydroxide compliance across multiple jurisdictions:

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Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
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Substance Compliance
Check compliance across 55 jurisdictions
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MoS Calculator
Calculate Margin of Safety using SCCS methodology
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Heavy Metal Limits
Compare limits across jurisdictions

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