Calcium Hydroxide
Calcium hydroxide is an inorganic compound used primarily as a pH adjuster in cosmetic formulations. It is a strong alkaline substance that can raise the pH of products. Due to its high alkalinity, it is used with caution and in specific applications, such as depilatories.
NonePH adjusterVeganEvidence: High
RiskHigh 2.8 / 4
Irritation i3 / 4
Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.
Sensitization i1 / 4
Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.
Systemic exposure i0.5 / 4
Whether it has meaningful potential to be absorbed into the body at levels that may matter biologically. Most cosmetic ingredients score low unless there is known concern or high exposure.
Rated by SpottyLabs' ingredient methodology, independent of brands.
What it helps with
Things to watch
- Can be irritating to skin and eyes
- May cause chemical burns at high concentrations
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Frequently asked questions
- What is calcium hydroxide used for in cosmetics?
- In cosmetics, calcium hydroxide is primarily used to increase the pH of a product. It is notably found in depilatory creams where its alkalinity helps break down hair proteins for removal.
- Is calcium hydroxide safe for skin?
- Calcium hydroxide is a strong alkaline substance and can be irritating or corrosive to the skin, especially at higher concentrations or with prolonged contact. Its use in cosmetics is carefully controlled to minimize risks.
Spotty Labs
