What is this ingredient?

이 원료는 다음의 구조를 갖는 유기화합물이다.

Are there usage precautions?

아스코빅애씨드, 즉 비타민 C는 강력한 항산화제로, 피부 미백 및 콜라겐 생성 촉진에 도움을 줍니다. 광범위하게 사용됩니다. Vitamin C (ascorbic acid) protects the skin by neutralizing free radicals generated from UV exposure and pollution, preventing oxidative damage to skin cells, lipids, and proteins. It supports collagen biosynthesis by acting as a cofactor for enzymes prolyl and lysyl hydroxylase, which stabilize collagen's triple helix structure, thereby maintaining skin firmness and elasticity. Vitamin C inhibits tyrosinase, an enzyme critical to melanin production, helping to reduce hyperpigmentation and improve skin tone. It also enhances skin repair and healing by promoting collagen formation and bolstering immune response at wound sites. Though not a sunscreen, it provides photoprotective effects by reducing UV-induced inflammation and DNA damage. Vitamin C works synergistically with other antioxidants like Vitamin E and ferulic acid for enhanced skin protection and anti-aging benefits

All ingredients

Ingredient Dictionary

ASCORBIC ACID

Clinical evidence

Dark spots B+
Lines B
Firmness C

Amount studies used: 10–20%
When: morning
Irritation: moderate — start every other day

Grades were set by reading this ingredient’s studies. They describe the ingredient, not every product that contains it.

ASCORBIC ACID Molecular structure — Molecular structure

How much products actually contain

183 products state the amountmedian 0.0006%12% at or above the amount studies used (10–20%)

under 0.01% 138
0.01–0.1% 16
0.1–1% 1
1% or more 28

Amounts are mostly stated by products named after the ingredient, so they may lean towards token amounts.

Of the products containing it, 265 list it before the 1% line and 639 after it (usually 1% or less).

Where no amount is stated, a product listing it early reaches the study amount about 51% of the time, one listing it late about 0%.

Clinical evidence grade by skin concern

B: one or two randomised trials
C: uncontrolled or multi-ingredient studies

Oxidises easily in light and air. Sensitive skin may sting.

3 references

Products using this ingredient

12 of 899 confirmed · likeliest to carry enough first · See all 899

Cosmetic roles

Keeps pH steadyBUFFERINGSlows spoilage by oxygenANTIOXIDANTListed as a fragrance-composition material (not a claim that it adds scent)FRAGRANCEKeeps skin in good condition (CosIng catch-all)SKIN CONDITIONING

Safety & regulatory references

Other restriction: ban substances that deplete the ozone layer

Source: EU CosIng ingredient list

Reviewed by CIR: Extended Re-review Summary: Safety Assessment of Ascorbic Acid and Ascorbates as Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)

More data — names, identifiers, properties, test records, literature

Official labels & definitions

JCIA labelling name アスコルビン酸: 本品は、ビタミンCであり、次の化学式で表される。

Source: JCIA labelling names (Japan)

Names & identifiers

ASCORBIC ACIDINCI아스코빅애씨드Korean label name (MFDS standard)アスコルビン酸Japanese labelling name

CAS No.chemical registry number: 50-81-7
CAS No.chemical registry number: 50-81-7 / 62624-30-0
CAS No.chemical registry number: 62624-30-0
EC No.EU chemical inventory number: 200-066-2
EC No.EU chemical inventory number: 200-066-2 / 263-644-3
EC No.EU chemical inventory number: 263-644-3

Measured properties

Appearance: L-ascorbic acid is a white to very pale yellow crystalline powder with a pleasant sharp acidic taste. Almost odorless. (NTP, 1992) · Dry Powder, CBI
Odour: Odorless
Melting point: 374 to 378 °F (decomposes) (NTP, 1992) · 191 dec °C
Solubility: greater than or equal to 100 mg/mL at 73 °F (NTP, 1992) · 400000 mg/L (at 40 °C)
Density: 1.65 (NTP, 1992) - Denser than water, will sink · 1.65 g/cu cm at 25 °C
Stability: Stable to air when dry, impure preparation and in many natural products vitamin oxidizes on exposure to air and light. Aqueous solutions are rapidly oxidized by air, accelerated by alkalies, iron, copper
pH: Between 2,4 and 2,8 (2 % aqueous solution) · pH = 3 (5 mg/mL), pH = 2 (50 mg/mL)
Dissociation constant: 4.7 (at 10 °C) · pK1 = 4.17, pK2 = 11.57

Values measured on the substance itself, not a specification for a commercial raw material.

Source: PubChem