Potassium Ascorbyl Tocopheryl Phosphate
AKA “Epc-K1, EPC-K, 127061-56-7, 61R4GJ48ER, DTXSID10155398, L-Ascorbic acid dl-alpha-tocopherol phosphoric acid diester potassium salt, Epc-K(1), RefChem:175414, DTXCID901436770”
Antioxidant
Ingredient Facts
Potassium ascorbyl tocopheryl phosphate
AKA: Epc-K1, EPC-K, 127061-56-7, 61R4GJ48ER, DTXSID10155398, L-Ascorbic acid dl-alpha-tocopherol phosphoric acid diester potassium salt, Epc-K(1), RefChem:175414, DTXCID901436770
Antioxidant · Antioxidant · EWG: 1
Synthetic
Antioxidant
Vitamin C
Clean
2H-1-Benzopyran-6-ol, 3,4-dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-, monoester with ascorbyl monophosphate, dipotassium salt
Effective at 0.11%
Formula
C35H56KO10P
Mol. Weight
706.90
CAS #
127061-56-7
Form
Powder
See origin →
Functions
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Neutralizes Free Radicals
Traditional Use
A synthetic derivative combining vitamin C (ascorbic acid, identified 1913) and vitamin E (tocopherol, identified 1922). This stabilized form was developed in the late 20th century to provide antioxidant benefits while improving shelf stability in skincare.
Skin Types
●all-skin-types
Best For
Sun Damage
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
0.01%
0.2%
0%0%
Effective Range
CIR reported use: 0.01-0.2
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR