The H.P.A Ampoule Mask Sheet 10P

Not on the ingredient list below: denatured or SD alcohol, essential oils, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.

Full INCI (39): Water, Propanediol, Glycerin, Dipropylene Glycol, 1,2-Hexanediol, Trehalose, Hydroxyacetophenone, Octyldodeceth-16, Arginine, Carbomer, Adenosine, Disodium EDTA, Allantoin, Xanthan Gum, Panthenol, Butylene Glycol, Glycine, Glutamic Acid, Aspartic Acid, Cetraria Islandica Extract, Sodium Polyacrylate, Sodium Chloride, Gluconolactone, Streptococcus Thermophilus Ferment, Serine, Histidine, Lactobacillus Ferment Lysate, Lactococcus Ferment Lysate, Bifida Ferment Filtrate, Bifida Ferment Lysate, Alanine, Threonine, Proline, Saccharomyces Ferment Filtrate, Acrylates/​C10-30 Alkyl Acrylate Crosspolymer, Capryloyl Salicylic Acid, Magnesium Chloride, Calcium Chloride, Fragrance

Ingredient list read from incidecoder.com on 10 September 2026.

38 of 39 explained

Water solvent

Water is the base almost every serum, toner and cream is built on. It dissolves the water-loving ingredients and sets how light the finished texture feels. On an INCI list it is usually first, which only means it is the largest single ingredient by weight.

Propanediol humectant

Propanediol is a plant-derived glycol used in place of propylene glycol. It hydrates, carries actives into solution, and gives a lighter, less sticky slip than glycerin at the same strength.

Glycerin humectant

Glycerin is the most used humectant in skincare. It draws water into the outer layer of skin and holds it there, and it is one of the very few ingredients whose hydrating effect is settled science rather than marketing. Higher amounts feel tacky, which is why it is usually blended.

Dipropylene Glycol humectant

Dipropylene Glycol is a glycol used as a solvent and a light humectant. Its main job is keeping the rest of the formula dissolved and the texture fluid rather than adding hydration of its own.

1,2-Hexanediol humectant

1,2-Hexanediol is a glycol used for two reasons: it holds water like glycerin, and it makes a formula harder for microbes to live in, so less traditional preservative is needed. Korean formulas use it heavily for that second reason.

Trehalose humectant

Trehalose is a sugar that some desert plants use to survive drying out. In skincare it is a humectant that holds water in the outer layer and helps a formula feel comfortable rather than tight.

Hydroxyacetophenone preservative booster

Hydroxyacetophenone is an antioxidant that also strengthens a preservative system, so a formula needs less traditional preservative. Korean formulas pair it with 1,2-hexanediol constantly.

Octyldodeceth-16 emulsifier

An ethoxylated branched fatty alcohol. It emulsifies and also gives a formula a soft, cushioned slip.

Arginine amino acid

Arginine is an amino acid that does two jobs here: it holds water in the outer layer of skin, and it neutralises acidic gelling agents, which is why it often stands in for a synthetic pH adjuster.

Carbomer thickener

Carbomer is a synthetic polymer that only gels once a base neutralises it, which is why arginine or tromethamine sits nearby on the list. It gives the clear, non-stringy gel texture a xanthan formula cannot reach.

Adenosine active

Adenosine is a nucleoside that Korea's own cosmetic authority recognises as a wrinkle-care functional ingredient, which is why it appears on so many Korean lists at a low level. It is used for the look of fine lines and is stable and well tolerated.

Disodium EDTA chelator

EDTA is a chelator: it locks up trace metal ions from water and packaging that would otherwise turn a formula cloudy, off-colour or rancid. It does nothing to skin and appears at a fraction of a percent.

Market

Korean market, the version sold in Korea

Made in

Republic of Korea

Category

Mask

Actives

Adenosine, Allantoin, Panthenol, Salicylic Acid, Trehalose

Ships from

California or Korea

Orders ship from California or direct from Korea with tracked delivery to your door, and both routes carry the same Korean-market release. Shipping is free on orders of $100 or more. Returns are accepted for 30 days, by mail.

We split shipments free, so one out-of-stock item never holds up the rest of your order.

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Every unit keeps its original barcode and batch code intact, so the unit in your hands can be checked against the brand’s own records.

Every order ships from California or direct from Korea, and returns run for 30 days.

Every claim on this page traces to the unit in the box, the barcode, the batch code and the price you can read for yourself.