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Dicalcium Phosphate
AKA “7757-93-9, CALCIUM HYDROGEN PHOSPHATE, Calcium phosphate dibasic, calcium hydrogenphosphate, Dibasic calcium phosphate, Calcium phosphate, dibasic, secondary Calcium phosphate, Biofos, Phosphoric acid, calcium salt (1:1)”
Ingredient
Ingredient Facts
Dicalcium phosphate
AKA: 7757-93-9, CALCIUM HYDROGEN PHOSPHATE, Calcium phosphate dibasic, Calcium hydrogenphosphate, Dibasic calcium phosphate, Dibasic, Secondary Calcium phosphate, Biofos, Phosphoric acid, Calcium salt (1:1)
Ingredient · Abrasive · EWG: 1
Synthetic
Clean
Calcium hydrogenorthophosphate
Effective at 24.65%
Solubility Sparingly soluble in water. Insoluble in ethanol
Formula
CaHO4P
Mol. Weight
136.06
CAS #
7757-93-9
Form
Powder
State
Dry Powder, Pellets or Large Crystals; Pellets or Large Crystals; Other Solid; Dry Powder
See origin →
Functions
Abrasive
Bulking
Opacifying
Oral Care
Physical Exfoliant
Adds Body & Volume
Adds Opacity
Antioxidant Protection
Reduces Inflammation
Brightens Skin
Gently polishes surface
Supports dental health
Adds volume
Creates creamy opacity
Traditional Use
Mineral salt used historically as a mild abrasive in tooth powders and dentifrices dating back to the 19th century. Later adopted in cosmetics as a bulking agent and anti-caking ingredient.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Concentration Guide
0.3%
49.0%
0%69%
Effective Range
CIR reported use: 0.3-47.7 | 6.8-49
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Safety Assessment of Phosphoric Acid and Its Salts as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
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Calcium Phosphate
European Commission
EU Cosmetic Ingredient Database (CosIng)
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Dicalcium Phosphate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Dicalcium Phosphate Dihydrate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Metaphosphoric Acid
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Phosphoric Acid
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Tricalcium Phosphate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Calcium Phosphate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
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Dicalcium Phosphate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Dicalcium Phosphate Dihydrate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Phosphoric Acid
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Tricalcium Phosphate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Composite Aerogel Scaffolds Containing Flexible Silica Nanofiber and Tricalcium Phosphate Enable Skin Regeneration.
Wang X, Yuan Z, Shafiq M, Cai G, Lei Z et al.
ACS applied materials & interfaces, 2024
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Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR