Common Name(s): Buffered vitamin c,ascorbate calcium

CAS Number: 5743-27-1

DESCRIPTION

What It Does: Gentle non-acidic vitamin c antioxidant and brightening with potential calcium-mediated barrier support.

Why It's Used: Tolerant neutral-ph vitamin c for sensitive skin and formulations where acidic ph is problematic.

How It Works: Dissociates to release ascorbate at near-neutral ph for antioxidant and tyrosinase inhibition. calcium ions contribute to keratinocyte differentiation regulation.

Typically Found In: Brightening serums,antioxidant formulations

TECHNICAL DETAILS

Primary Category: Active ingredient – vitamin c derivative

Secondary Functions: Ph-neutral vitamin c,barrier support

Application Areas:

Typical Concentration Range: 1%–10%

SOURCING & ETHICS

Vegan Status: Conditional - supplier confirmation required

Halal Status: Unverified - supplier confirmation required

Source Notes: Produced by reacting ascorbic acid with calcium carbonate or calcium hydroxide. [audit 2026-07-29 rev2: the record's own source_notes does not assert a non-animal origin, or instructs the reader to verify with the supplier; "yes" asserts knowledge the record does not hold. determination requires shariah-panel sign-off.]

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Non-irritating; suitable for all skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Excellent safety profile. ewg score: 1.

Works Well With: Tocopherol,ferulic acid,niacinamide,spf

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

Calcium plays a critical role in the epidermal calcium gradient regulating keratinocyte differentiation. calcium ascorbate may provide dual benefit: ascorbate activity plus calcium-mediated barrier regulation.

Last Verified: