Meet the Vitamin C Derivative in Our Microdart
- Ingredient Guide
Why Sodium Ascorbyl Phosphate appears in skincare for uneven tone.
Sodium Ascorbyl Phosphate, often shortened to SAP, is a vitamin C derivative used in cosmetics for its antioxidant function. It is often included in formulas focused on uneven skin tone and visible signs of skin aging.
In the CLERIVY Microdart Spot Patch, SAP is part of the Tone Care group.
How Is It Different from Pure Vitamin C?
The pure form of vitamin C is L-ascorbic acid. Sodium Ascorbyl Phosphate is a phosphorylated derivative of ascorbic acid with its own chemical identity.
This is why a product may describe SAP as a vitamin C derivative while listing Sodium Ascorbyl Phosphate as the exact ingredient.
The distinction also matters when comparing research. Results from L-ascorbic acid or another vitamin C derivative cannot automatically be applied to SAP.
How It Fits into the CLERIVY Formula
The Microdart Spot Patch’s Tone Care group includes:
7% Niacinamide
3% Tranexamic Acid
Sodium Ascorbyl Phosphate
The listed percentages refer to Niacinamide and Tranexamic Acid, respectively.
All three ingredients are part of the dissolving patch formula. The accompanying Blemish Clearing Pad has its own separate ingredient list.
What SAP Research Can Tell Us
Researchers have studied SAP in topical formulas focused on uneven pigmentation, wrinkles, and skin elasticity.
One controlled study used a lotion containing 6% L-ascorbate-2-phosphate trisodium salt. Another clinical study compared 5% SAP and ascorbic acid in emulgel formulations.
These studies tested lotions and emulgels at specific concentrations. Neither studied a dissolving microdart patch or a CLERIVY product, so they do not establish how the finished Microdart Spot Patch performs.
Studies conducted on the finished CLERIVY Microdart Spot Patch are covered separately on CLERIVY Product Testing & Certifications, together with their methods and limitations.
Explore the Complete Formula
Sodium Ascorbyl Phosphate is part of the complete Microdart Spot Patch formula.
Visit What’s Inside a CLERIVY Microdart to explore the patch formula and the separate ingredient list for the Blemish Clearing Pad.
Related Reading
Sources
CLERIVY Microdart Spot Patch — current product copy and ingredient list
What’s Inside a CLERIVY Microdart — complete patch and Blemish Clearing Pad formulas
PubChem: Sodium Ascorbyl Phosphate — chemical identity
Cosmetic Ingredient Review: Safety Assessment of Ascorbic Acid and Related Ingredients — cosmetic antioxidant function
Ishikawa et al., L-Ascorbate-2-Phosphate Trisodium Salt and Solar Lentigos — controlled lotion study; not a CLERIVY product study
Mohammadi et al., Comparative Study of 5% Sodium Ascorbyl Phosphate and Ascorbic Acid Emulgels — clinical study using emulgel preparations; not a CLERIVY product study
The CLERIVY Microdart Spot Patch is a cosmetic product. It is not intended to treat, prevent, or cure acne or any other medical condition.
Last updated: September 6, 2026
