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NOSCA9 Deep Pore Cleansing Foam$14.11COSRX
Low pH Niacinamide Micellar Cleansing Water (2-step Daily Deep Cleansing)
COSRX's Low pH Niacinamide Micellar Cleansing Water is a sixteen-ingredient cleansing water on a single mild surfactant, panthenol fourth, niacinamide declared at 1,000 ppm, and zinc PCA and madecassoside behind them, with a citrate buffer holding the pH down. Swept on a cotton pad as the first cleanse.
No reviews yet$16.99
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Congested skinUneven textureDehydrated skin
- Helps with
- Shoppers looking for Niacinamide in a cleansing waterRoutines that want Niacinamide and Allantoin in one stepFilling the cleansing water step with a Korean-market formula
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$14.11
$17.64
$17.64
- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
Key benefits
- Niacinamide, the active this cleansing water is built around
- Allantoin, Zinc PCA and Madecassoside on the same list, actives
- Panthenol on the same list, a humectant
- Sodium Hyaluronate further down the same list
- Niacinamide named seventh on the manufacturer list printed on this page
Key actives
4Panthenolhumectant
Panthenol is pro-vitamin B5: skin converts it to pantothenic acid. It is a humectant that holds water and leaves skin feeling soft and less tight, and it is one of the ingredients formulators reach for when a formula also contains something harsh. It is named fourth on this cleansing water's list, alongside Niacinamide.
6Allantoinactive
Allantoin is a comfrey-derived compound used to condition skin and soften the outer layer so it feels smoother. It is one of the standard additions to a formula built for easily irritated skin. The panel names it sixth on this cleansing water's list, beside Niacinamide.
7Niacinamideactive
Niacinamide is vitamin B3, and it is the most studied active in Korean formulation. The name on the box points at it, and it is named seventh on this cleansing water's own ingredient list.
8Zinc PCAactive
Zinc PCA pairs zinc with the humectant PCA. It is used in oily and blemish-prone formulas for the look of shine and visible pores, and it hydrates at the same time. The panel names it eighth on this cleansing water's list, beside Niacinamide.
9Madecassosideactive
Madecassoside is the centella triterpene most associated with the look of redness, and the one brands lead with in cica products. It is water soluble and stable, so it appears in essences as readily as in creams. The panel names it ninth on this cleansing water's list, beside Niacinamide.
Inside the formula
Inside the formula
16
Ingredients declared
No fragrance
on the list
4Panthenol6Allantoin7Niacinamide8Zinc PCA9Madecassoside
- 4Panthenol
- 6Allantoin
- 7Niacinamide
- 8Zinc PCA
- 9Madecassoside
Where each key active sits on the declared ingredient list, by entry number. Position is proportion: the further forward, the larger its share.
COSRX Low pH Niacinamide Micellar Cleansing Water (2-step Daily Deep Cleansing)
Where does this cleansing water go in my routine?
On dry skin as the first evening cleanse, before any water. Nothing goes under it: this cleansing water is the step everything else in the routine lands on top of. If you are adding it to a routine you already like, give it a week on its own first, so what you see is the Niacinamide and not three changes at once.
What else is on the list besides Niacinamide?
Allantoin, Zinc PCA and Madecassoside. The order they are printed in on this cleansing water's panel is the order on the box, so you can see where Niacinamide sits relative to them. Further down the same panel: Panthenol and Sodium Hyaluronate.
Not on the ingredient list below: fragrance or parfum, denatured or SD alcohol, essential oils, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (16): Water, Dipropylene Glycol, Polyglyceryl-4 Caprate, Panthenol, Sodium Hyaluronate, Allantoin, Niacinamide(1,000ppm), Zinc PCA, Madecassoside, Propanediol, Caprylyl Glycol, Ethylhexylglycerin, 1,2-Hexanediol, Sodium Citrate, Citric Acid, Disodium EDTA
Ingredient list read from incidecoder.com on 9 September 2026.
16 of 16 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.
- 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.
- Polyglyceryl-4 Caprate emulsifier
- Polyglyceryl-4 Caprate is a mild sugar-derived solubiliser used to dissolve fragrance and oil into watery formulas.
- Panthenol humectant
- Panthenol is pro-vitamin B5: skin converts it to pantothenic acid. It is a humectant that holds water and leaves skin feeling soft and less tight, and it is one of the ingredients formulators reach for when a formula also contains something harsh.
- Sodium Hyaluronate humectant
- Sodium Hyaluronate is the salt of hyaluronic acid, and it is what most products labelled hyaluronic actually contain. The salt dissolves more readily and the molecule is smaller, so it sits in the outer layer of skin rather than only on top of it.
- Allantoin active
- Allantoin is a comfrey-derived compound used to condition skin and soften the outer layer so it feels smoother. It is one of the standard additions to a formula built for easily irritated skin.
- Niacinamide(1,000ppm) active
- Niacinamide is vitamin B3, and it is the most studied active in Korean formulation. It is used at roughly 2 to 5 percent for the look of uneven tone and visible pores, and it is water soluble, stable and comfortable beside almost every other active, which is why it turns up in so many lists.
- Zinc PCA active
- Zinc PCA pairs zinc with the humectant PCA. It is used in oily and blemish-prone formulas for the look of shine and visible pores, and it hydrates at the same time.
- Madecassoside active
- Madecassoside is the centella triterpene most associated with the look of redness, and the one brands lead with in cica products. It is water soluble and stable, so it appears in essences as readily as in creams.
- 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.
- Caprylyl Glycol preservative booster
- Caprylyl Glycol is a glycol that conditions skin and, more importantly, strengthens a preservative system so less of the traditional preservative is needed. It appears in most modern formulas built without parabens.
- Ethylhexylglycerin preservative booster
- Ethylhexylglycerin softens skin and boosts a preservative system, which is why it is nearly always sitting beside phenoxyethanol or 1,2-hexanediol. It also cuts down the odour bacteria produce, so it turns up in deodorising products.
4 more explained
- 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.
- Sodium Citrate pH adjuster
- Sodium Citrate is the salt of citric acid, used as a buffer: it holds a formula at a steady pH rather than pushing it in one direction. It is also a mild chelator.
- Citric Acid pH adjuster
- Citric Acid is used in tiny amounts to bring a formula to the pH its actives need, not as an exfoliant at that level. It is an AHA, so at much higher concentrations it can also exfoliate.
- 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
- Cleanser
- Actives
- Allantoin, Centella Asiatica, Madecassoside, Niacinamide, Panthenol, Sodium Hyaluronate, Zinc PCA
- 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.
Where this unit came from
- 1Seoul
Bought as Korean-market stock - 2Barcode
Listed against the Korean barcode on its box - 3California or Korea
Ships to you from either, as the same Korean-market release
We stock the version of a formula that is sold in Korea, not the release a brand prepares for another market under the same name.
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.
How it works
The Low pH Niacinamide Micellar Cleansing Water is a cleansing water, used on dry skin as the first evening cleanse, before any water. The active it is built around is Niacinamide, named seventh on its own ingredient list. The same list carries Allantoin, Zinc PCA and Madecassoside, so the active is not the only thing on it worth naming. How much of the Niacinamide stays on the skin, and for how long, is decided by the cleansing water format rather than by the list alone. COSRX sells this Niacinamide cleansing water in Korea, and this is that version.
How to use
- Use the Low pH Niacinamide Micellar Cleansing Water as your first cleansing step, on dry skin, before any water touches the face.
- Soak a cotton pad, sweep it over the face, then hold it against each eye for a few seconds before wiping.
- Follow with your usual gel or foam cleanser, then toner while the face is still damp.
- Once or twice a day, whenever there is makeup or sunscreen to lift. Do not scrub the pad back and forth over one spot; a soaked pad is a solvent rather than an eraser.
Worth knowing
- Patch test this cleansing water on a small area and wait a day before using it more widely, especially with Niacinamide on the list.
- Introduce this cleansing water on its own for the first week, so anything your skin does is traceable to the Niacinamide rather than to three changes at once.
Reviews
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COSRX Low pH Niacinamide Micellar Cleansing Water (2-step Daily Deep Cleansing)
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
COSRX, Korean-market original
This is COSRX's low-pH version of that step, with niacinamide in the name.
Verify your unit when it arrives
Verify your unit when it arrives
Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.
COSRX verifies units itself. Find the verification page on cosrx.com and enter the batch number and expiration date printed on your unit. Read them off the package rather than from us, which is the point.
Source: COSRX FAQ
On the unit itself
- The Korean-market barcode, unaltered from the retail package.
- The manufacturer’s batch code, exactly as the maker printed it.
정품Genuine article, Korean-market stock
What professionals say
What professionals say
What skin-care professionals say about the key actives in this formula, quoted from the medical sources linked beside each.
Allantoin can tone down the dryness of the individual cells. It increases the water content of the skin, which means it helps to hydrate and moisturize.
Wilma Bergfeld, MDDermatologist, Cleveland Clinic Centella can make your skin appear more hydrated, plumper and healthier.
Samantha Stein, PA-CDermatology physician assistant, Cleveland Clinic
1 more professional perspective
Niacinamide helps reduce the appearance of pores in a few ways. By strengthening the skin barrier and improving elasticity, pores appear less noticeable and more even.
Ashlyn YankeAesthetician, Cleveland Clinic
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