Ingredient glossary
Dipotassium Phosphate
On your shelf ✓What Dipotassium Phosphate does for your skin, who it suits, and what to watch for.
INCI: Dipotassium Phosphate · Also: Potassium phosphate dibasic
In short: Dipotassium Phosphate delivers pH adjuster, plays a broad, supporting role, and the evidence behind it is strong. One thing to know: needs the right pH to work.
- What it does
- PH adjuster
- Best for
- A broad, supporting role
- Watch out
- Needs the right pH to work
- Evidence
- Strong
The Glow take
Nice to have, and nothing to overthink.
Dipotassium Phosphate plays a quiet supporting role, rounding out a formula rather than being the reason you buy it.
— Maya
What it does
- pH adjuster
strong evidenceSafety assessments on phosphoric acid and its salts describe dipotassium phosphate as a buffering agent in foods and cosmetics that is safe at the low levels used. Cosmetic references list it as technical pH control with no independent skin benefit.
Who it's for, and who should skip it
Tends to suit
No specific skin type. It is a broadly used ingredient.
Approach with care
No specific group flagged to avoid it.
- Clogs poresLow
- Irritation riskLow
- pH-dependentIts effect depends on the product's pH
How it fits each skin type
- DryNeutral
- CombinationNeutral
- OilyNeutral
- SensitiveNeutral
Where it fits in your routine
Plays well with
- preservatives
Dipotassium Phosphate, answered
Is Dipotassium Phosphate safe during pregnancy?
Yes. Dipotassium Phosphate is considered safe to use during pregnancy and breastfeeding. As with anything, if you are unsure it is worth a quick word with your doctor or midwife.
Who should avoid Dipotassium Phosphate?
No specific group is flagged to avoid Dipotassium Phosphate. It is well tolerated by most skin. Still, introduce anything new one product at a time.
What concentration of Dipotassium Phosphate actually works?
Its concentration is rarely printed on the label, so use the ingredient list as your clue: near the top third it is likely doing real work, near the bottom it is more of a sprinkle.
This, for every label you own
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