AC
AGreat
Low PH BHA Overnight Mask
The CosRX Low PH BHA Overnight Mask is a leave on & sleeping mask. Our analysis of its 26 ingredients (24 low-risk) rates it Excellent (98/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin.
The CosRX Low PH BHA Overnight Mask is a leave on & sleeping mask. Our analysis of its 26 ingredients (24 low-risk) rates it Excellent (98/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin.
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
Dry Skin
8/5
Oily/Acne-Prone Skin
2/0
Sensitive Skin
3/7
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
1
|
A
|
1,2-Hexanediol
(Solvent) |
|
|
1
|
|
Gluconolactone
(Fragrance, Humectant, Solvent) |
|
|
1
|
A
|
Elaeis Guineensis (Palm) Oil |
Fungal Acne Trigger
|
|
1
|
A
|
Elaeis Guineensis (Palm) Kernel Oil |
Fungal Acne Trigger
|
|
1
|
A
|
Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing) |
|
|
1
|
A
|
Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning) |
Good for Dry Skin
|
|
1
|
B
|
Betaine
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning, Viscosity Controlling) |
|
|
1
|
|
Betaine Salicylate
(Antimicrobial Agent, Exfoliant, Keratolytic) |
|
|
1
|
A
|
Cetearyl Alcohol
(Emulsion Stabilising, Opacifying, Foam Boosting, Viscosity Increasingagent Aqueous, Viscosity Increasing Agent, Emollient, Emulsifying, Viscosity Controlling) |
|
|
1
|
B
|
Cetearyl Olivate
(Hair Conditioning) |
|
|
1
|
A
|
Sorbitan Olivate
(Emulsifying, Surfactant) |
Fungal Acne Trigger
|
|
1
|
A
|
Ethylhexylglycerin
(Deodorant, Skin Conditioning) |
|
|
1
|
A
|
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling) |
|
|
1
|
|
Water
(Solvent) |
|
|
1
|
A
|
Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, Solvent) |
|
|
1
|
A
|
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling) |
Good for Dry Skin
|
|
2
|
A
|
Glycerin
(Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care Agent, Oral Health Care Drug, Skin Protecting, Viscosity Decreasing Agent, Perfuming, Solvent) |
Good for Dry Skin
Fungal Acne Trigger
|
|
1
|
|
Melaleuca Alternifolia (Tea Tree) Leaf Oil
(Antioxidant, Fragrance, Perfuming) |
Bad for Sensitive Skin
|
|
1
|
|
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
(Emulsion Stabilising, Viscosity Controlling) |
|
|
1
|
A
|
Helianthus Annuus (Sunflower) Seed Oil |
Fungal Acne Trigger
|
|
3
|
A
|
Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning) |
Silicone
|
|
3
|
B
|
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent) |
|
|
3
|
A
|
Ethyl Hexanediol
(Fragrance, Solvent) |
|
|
3
|
|
PEG-8 Beeswax
(Emulsifying, Surfactant) |
|
4
|
B
|
Lactic Acid
(Exfoliant, Fragrance, Humectant, Ph Adjuster, Skin Conditioning Agent Humectant, Skin Conditioning, Buffering Agent) |
Bad for Sensitive Skin
|
|
B
|
Centella Asiatica Leaf Water
(Skin Conditioning) |
No personal ingredient notes yet. Save ingredients to your profile to get good/bad alerts here.
How to use
General guidance from this product's category and active ingredients — always follow the directions on the package.
Trust & honesty
Contains ingredients some choose to avoid or double-check while pregnant or nursing.
Low-strength topical salicylic acid (BHA) is generally considered fine. Caution is usually reserved for high-strength leave-on products and salicylic peels.
This is general information, not medical advice. Pregnancy guidance varies and depends on concentration and your individual situation — always check with your doctor, midwife or pharmacist. How we flag this.
The concentrations these actives are typically effective at in research — not a measurement of this product.
Most research uses 2–5%; some formulas go to 10%. Very high levels can cause flushing in sensitive skin.
Niacinamide
Salicylic acid is OTC-capped at 2%; 0.5–2% is the usual leave-on range. Much below that it acts more as a soothing agent than an exfoliant.
Betaine Salicylate
OTC leave-on AHAs are usually 5–10%. The effect also depends on pH and free-acid value, not the percentage alone.
Lactic Acid
INCI lists don't disclose amounts, and we don't claim to know this product's levels — these are the ranges these ingredients are usually effective at, so you can tell a real formula from "fairy-dusting" a marketed active. How we estimate this.
From the community
Used this product? Rate it in 10 seconds
3 reviews restored from our original community.
I bought this product because I really like the Rice overnight mask from Cosrx and I thought this would be similar but with the 0.9% BHA to help prevent blemishes. It also contains Centella Asiatica which my skin really likes. I didn't really like the consistency, it felt a little too thick, like a balm. I would only use it at a leave in night mask, not as a normal moisturizer. It smells like tea tree. I didn't notice any difference while using this product, so I would stick to a higher BHA t...
I've absolutely no clue as to why, but this product breaks me out terribly. It doesn't contain any of my known irritants or anything terribly comedogenic, so I really can not fathom why it does that. Other than that, it did seem to make my skin feel plump, but because of the breakouts every time I use this, I'm not inclined to give this product a longer try to see if the benefits were substantial.
Left a 3-star rating.
Alternatives
