Ingredient guide
Calcium Hydroxide
INCI name · calcium hydroxide
In short
A strongly alkaline pH adjuster used in specific products like depilatory creams. Its safety depends on the finished formula’s pH, as the raw material itself is highly irritating at high levels.
Best used
Anytime
What it is
Strong alkaline pH adjuster used in depilatory creams and some professional peels. Highly irritating at high concentrations. In finished products it is typically neutralised. The final formula pH determines safety, not the raw ingredient alone.
Evidence receipt
No linked study yet
No verified study is linked to this exact ingredient and route. The guidance below describes conventional use; it is not evidence of efficacy.
Also found as
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Common questions
What does Calcium Hydroxide do in skincare?
It raises pH in formulas that require an alkaline environment, such as certain depilatory products. In most finished products it is neutralised and doesn’t act as an irritant on its own.
Is Calcium Hydroxide safe on skin?
It can be irritating in raw form, but products that use it are carefully pH‑balanced. The safety depends on the final formula, not the ingredient by itself.
Where is Calcium Hydroxide found?
It is mainly found in hair removal creams and some professional peel systems.
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