Potassium Ascorbyl Tocopheryl Phosphate

AKA: Epc-K1, EPC-K, 127061-56-7, L-Ascorbic acid dl-alpha-tocopherol phosphoric acid diester potassium salt, Epc-K(1)
Synthetic
Antioxidant
Clean
OriginDerived from ascorbic acid (vitamin C) and tocopherol (vitamin E), combined with phosphate esters. Synthesized through esterification of ascorbic acid and tocopherol with phosphoric acid derivatives.
2H-1-Benzopyran-6-ol, 3,4-dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-, monoester with ascorbyl monophosphate, dipotassium salt
Formula
C35H56KO10P
Mol. Weight
706.90
CAS #
127061-56-7
Form
Powder
Skin Types
●all-skin-types
Best For
Sun Damage
Pregnancy & Breastfeeding Safe
Yes
Functions
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Neutralizes Free Radicals
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed4 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
Leave-on0.01–0.2%
Rinse-off0.01%
0%50%100%
CIR reported use · 2013 survey
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR