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S2 Salicylic Acid 2% Liquid

S2 Salicylic Acid 2% Liquid

Product Description

Product overview

Made in Various INTERNATIONAL

A powerful yet gentle BHA exfoliant combining 2% Salicylic Acid with Betaine Salicylate and 2% Niacinamide to unclog pores, fight acne, reduce blackheads, and improve overall skin clarity without over-drying. Enriched with soothing botanical extracts for a balanced, radiant complexion.

BHA 2% Niacinamide 2% Fragrance-Free Paraben-Free Cruelty-Free Vegan Alcohol-Free 85% Natural Origin
Pregnancy
Caution
Fungal Acne
Yes
Comedogenic
1/5
Size
120ml / 4 fl oz
BHA Type
Salicylic Acid
pH Level
3.5 - 4.0
Targets
Acne & Pores
KFDA
Certified
Real reviews · YouTube Shorts
Why it's different

Dual BHA Complex

Combines pure Salicylic Acid with gentle Betaine Salicylate for effective yet non-irritating exfoliation deep within pores.

01

Texture & feel

SENSORY
Consistency
Watery Liquid
Scent
Fragrance-Free
Absorption
30-60 seconds
Finish
Natural, Non-Sticky

Dual BHA Complex

Combines pure Salicylic Acid with gentle Betaine Salicylate for effective yet non-irritating exfoliation deep within pores.

Brightening Niacinamide

2% Niacinamide helps fade post-acne marks, regulate sebum production, and strengthen the skin barrier.

Botanical Soothing Complex

Rose, Lavender, Green Tea, and Mugwort extracts calm inflammation and reduce redness associated with breakouts.

Aloe Vera Base

Formulated with organic Aloe Vera instead of water for added hydration and soothing benefits.

02

Safety & compatibility

SAFE
Pregnancy

2% salicylic acid is generally considered safe by ACOG, but consult your doctor before use during pregnancy. Avoid high-dose peels.

Breastfeeding

Topical 2% salicylic acid is unlikely to be absorbed into breastmilk. Avoid applying on areas that contact baby's skin.

Fungal Acne (Malassezia)

Salicylic acid helps remove dead skin and oils that yeast feeds on. Formula is free from problematic oils and fatty acids.

Non-Comedogenic

Rating 1/5 - Contains no pore-clogging oils or heavy emollients. Safe for acne-prone skin.

Retinol Interaction

Avoid using with retinoids in the same routine. Alternate nights to prevent over-exfoliation and irritation.

Sun Sensitivity

While BHA doesn't increase photosensitivity like AHAs, always use SPF 30+ daily for best results and skin protection.

03

Ingredient breakdown

INGREDIENTS

Salicylic Acid 2%Proven

A beta-hydroxy acid (BHA) that is oil-soluble, allowing it to penetrate deep into pores to dissolve sebum, dead skin cells, and debris. FDA-approved for OTC acne treatment.

  • Mechanism: Breaks down keratin plugs and dissolves intracellular lipid matrix
  • Efficacy: Studies show 0.5-2% concentrations effective for mild-moderate acne
  • Anti-inflammatory: Related to aspirin; provides soothing benefits
May cause initial purging for 2-4 weeks as it brings congestion to the surface. Start with 2-3x/week usage.

Betaine Salicylate PresentGentle Alternative

A combination of salicylic acid and betaine that provides gentler BHA action. Popular in K-beauty due to Korean regulations limiting pure salicylic acid. Approximately half as potent as pure salicylic acid.

  • Benefit: Exfoliates while providing moisturizing betaine benefits
  • pH Range: Most effective at pH 3.8-4.2
  • Sensitivity: Better tolerated by sensitive skin types

Niacinamide 2%Proven

Vitamin B3 derivative with multiple proven benefits including oil control, pore minimization, barrier strengthening, and brightening. Works synergistically with BHA.

  • Oil Control: Reduces sebum production by up to 25% at 2%+ concentrations
  • Brightening: Inhibits melanosome transfer to reduce hyperpigmentation
  • Barrier Support: Increases ceramide and fatty acid synthesis
Safe to combine with BHA at this concentration. The 2% level provides benefits without risking niacin flush.

Aloe Barbadensis Leaf Extract BaseSoothing

Used as the primary base instead of plain water. Contains vitamins, amino acids, and polysaccharides that hydrate and calm the skin while reducing irritation from actives.

  • Anti-inflammatory: Contains acemannan and other compounds that reduce redness
  • Wound Healing: Accelerates skin repair and recovery
  • Hydration: Forms a protective film that locks in moisture

12 ingredients

Aloe Barbadensis Leaf Extract*, Propanediol, Salicylic Acid, Betaine Salicylate, Niacinamide, 1,2-Hexanediol, Rosa Damascena Extract*, Lavandula Angustifolia (Lavender) Flower Extract*, Camellia Sinensis Leaf Extract*, Melissa Officinalis Leaf Extract*, Artemisia Vulgaris Extract*, Hydroxyethylcellulose

*Natural Origin Ingredients (N.O.I.P 85%)

FREE FROM: Parabens, Sulfates, Artificial Fragrance, Artificial Colorants, Gluten, Formaldehyde, Alcohol, Silicones, Mineral Oil, PEGs
04

Where it fits in your routine

ROUTINE
1
Cleanser
2
Toner (Optional)
3
BHA Liquid
4
Serum
5
Moisturizer
6
Sunscreen (AM)

Best used in PM routine. Start with 2-3x per week and gradually increase. Wait 20-30 minutes before applying other products for maximum efficacy. Always follow with moisturizer.

05

How to use

HOW TO USE
1

Cleanse Face

Start with clean, dry skin. Use a gentle cleanser and pat face dry completely.

2

Apply Product

Dispense product onto a cotton pad and sweep across face following skin texture, or apply a small amount directly with palms and pat in.

3

Wait Time

Allow 20-30 minutes for the BHA to work at optimal pH before applying other products. This maximizes exfoliation benefits.

4

Follow Up

Apply hydrating serum and moisturizer. In the morning, always finish with SPF 30+ sunscreen.

06

Who is it for?

WHO

Perfect for you if:

  • You struggle with blackheads and clogged pores
  • You have oily or combination skin
  • You experience hormonal or mild-moderate acne
  • You want to reduce sebaceous filaments
  • You need a gentle introduction to BHAs
  • You prefer fragrance-free products
  • You want value for money (large 120ml size)

Consider alternatives if:

  • You have very dry or dehydrated skin
  • You're allergic to aspirin (salicylic acid related)
  • You're using prescription retinoids daily
  • You have active eczema or compromised skin barrier
  • You're pregnant and haven't consulted your doctor
  • You need a stronger professional-grade peel
07

Skin type compatibility

SKIN TYPES
Oily Skin
Excellent

BHA is oil-soluble, making it perfect for oily skin. Penetrates through sebum to unclog pores and regulate oil production.

Combination Skin
Excellent

Perfect for T-zone focus. Apply to oily areas while using lighter application on drier cheeks.

Acne-Prone Skin
Excellent

Antibacterial and anti-inflammatory properties target acne bacteria. Non-comedogenic formula won't clog pores.

Sensitive Skin
Good

Gentler than pure salicylic acid products due to betaine salicylate and aloe base. Start slowly and patch test first.

Dry Skin
Moderate

Use sparingly 1-2x weekly. Always follow with rich moisturizer. May cause dryness if overused.

Mature Skin
Good

Gentle exfoliation improves texture and product absorption. Niacinamide provides anti-aging benefits.

08

Results timeline

WEEK 8+
Week 1-2

Initial Adjustment

Skin may experience purging as BHA brings hidden congestion to the surface. This is normal and temporary. Slight tingling upon application is expected.

60% may experience purging
Week 2-4

Visible Improvement

Pores appear cleaner and smaller. Blackheads begin to reduce. Skin texture becomes smoother and more refined. Blemishes heal faster.

75% notice clearer pores
Week 4-8

Significant Results

Noticeable reduction in breakouts and blackheads. Skin tone more even thanks to niacinamide. Oil production balanced. Post-acne marks fading.

85% report fewer breakouts
Week 8+

Maintenance Phase

Consistent clear skin with continued use. Pores remain unclogged. Some users reduce frequency to 2-3x weekly for maintenance.

90% overall satisfaction
09

Ratings by platform

8K+ REVIEWS
iHerb
4.5
Rating
3,500+
Reviews
Main complaint: Some users with sensitive skin experienced initial irritation. Patch test recommended.
Amazon
4.3
Rating
2,800+
Reviews
Main complaint: Purging period can last longer for some users. Results take time.
YesStyle
4.4
Rating
850+
Reviews
Main complaint: Watery consistency may feel less "active" compared to thicker formulas.
Brand Website
4.7
Rating
1,200+
Reviews
Main complaint: Shipping times vary. Product works best with consistent long-term use.
10

Pros & cons

BALANCED

Praised

  • Excellent value - large 120ml size at affordable price
  • Non-sticky, lightweight texture absorbs quickly
  • Effectively clears blackheads and prevents breakouts
  • Fragrance-free and gentle formula
  • Multi-functional with niacinamide benefits
  • Clean ingredient list with 85% natural origin
  • Cruelty-free and vegan
  • Suitable for sensitive acne-prone skin

Criticized

  • May cause purging initially (normal but frustrating)
  • Slower results compared to stronger formulas
  • Plastic pump bottle not most eco-friendly
  • Can be drying if overused without moisturizer
  • Not effective for severe cystic acne (need prescription)
  • Watery texture may feel less substantial
11

Budget-friendly alternatives (dupes)

DUPES
85% Match
Salicylic Acid 2% Solution
$6.80
Budget Pick

Same 2% salicylic acid concentration. Simpler formula without niacinamide or botanical extracts. Smaller 30ml size. More basic but equally effective for pore clearing.

80% Match
BHA Blackhead Power Liquid
$23.00
Similar Price

Uses 4% Betaine Salicylate (gentler than pure SA) plus niacinamide. Willow bark water base. Slightly thicker gel texture. Popular K-beauty alternative with similar results.

70% Match
Max Strength Acne Pads
$5.49
Budget Pick

2% salicylic acid in convenient pad form. Contains menthol which can be irritating. No additional beneficial ingredients. More drying but very affordable option.

12

Comparison with competitors

SIDE-BY-SIDE
BHA 9 Treatment
Key Active Salicylic Acid 2%
Size 118ml
Added Benefits Green Tea, Methylpropanediol
Price Per Oz ~$8.90/oz
Fragrance None
Salicylic Acid 2%
Key Active Salicylic Acid 2%
Size 30ml
Added Benefits Minimal
Price Per Oz ~$6.80/oz
Fragrance None
BHA Blackhead Power Liquid
Key Active Betaine Salicylate 4%
Size 100ml
Added Benefits Niacinamide, Willow Bark, Panthenol
Price Per Oz ~$6.80/oz
Fragrance None
13

Storage & shelf life

12 MONTHS
Period After Opening (PAO)

12 months after opening

Storage

Store in a cool, dry place away from direct sunlight. Refrigeration not required but can extend freshness.

Packaging

Plastic bottle with pump dispenser for hygienic, measured dispensing.

Travel Friendly

Yes - 120ml is above carry-on limit (100ml), but can be checked or decanted into smaller container.

13

Frequently asked questions

FAQ

The American College of Obstetricians and Gynecologists (ACOG) considers topical products with 2% or less salicylic acid to be safe during pregnancy. However, we recommend consulting your healthcare provider before use. For breastfeeding, topical 2% salicylic acid is considered safe as it's unlikely to be absorbed into breastmilk in significant amounts. Avoid applying to areas that may come into contact with baby's skin or mouth.

Yes, this product is considered fungal acne safe. Salicylic acid helps remove the dead skin cells and oils that yeast feeds on, making the environment less hospitable for malassezia. The formula is free from problematic ingredients like fatty acids, oils, and esters that can feed fungal acne. The aloe vera base and botanical extracts used are safe for fungal-acne-prone skin.

Caution is advised when combining actives. Do NOT use with other BHAs or AHAs in the same routine to avoid over-exfoliation. For retinol: use on alternate nights (BHA one night, retinol the next). For Vitamin C: use Vitamin C in the morning and BHA at night, or wait 30 minutes between applications. The niacinamide in this formula works synergistically with the BHA. When in doubt, introduce one active at a time and monitor your skin's response.

This product is best suited for oily, combination, and acne-prone skin types. It's excellent for those struggling with blackheads, enlarged pores, sebaceous filaments, and mild-to-moderate acne. The addition of betaine salicylate and soothing botanicals makes it gentler than many BHA products, so it can also work for sensitive skin when used carefully. Those with very dry skin should use sparingly and always follow with moisturizer.

Most users notice initial improvements in skin texture within 2-4 weeks. Blackheads and clogged pores typically show improvement by week 4. Significant results including clearer skin, reduced breakouts, and more refined pores are usually visible by 6-8 weeks of consistent use. Note: Some users may experience purging (temporary increase in breakouts) during the first 2-4 weeks as the BHA brings hidden congestion to the surface. This is normal and should subside.

Apply after cleansing and toning (if you use toner). The order is: 1) Cleanser, 2) Toner (optional), 3) BHA Liquid (this product), 4) Wait 20-30 minutes for optimal efficacy, 5) Serum, 6) Moisturizer, 7) Sunscreen (AM only). Best used in your PM routine. Start with 2-3 times per week and gradually increase to daily use if your skin tolerates it well.

No, this product is non-comedogenic with a rating of 1/5. It contains no pore-clogging oils, heavy emollients, or problematic ingredients. In fact, the salicylic acid actively works to unclog pores by dissolving the sebum and dead skin cells that cause blackheads and breakouts. The formula is specifically designed for acne-prone skin and has been used safely by thousands of users with congested skin.

The product has a PAO (Period After Opening) of 12 months. This means it should be used within 12 months of first opening. Store in a cool, dry place away from direct sunlight to maintain efficacy. The 120ml size typically lasts 3-4 months with regular use (daily application), so you should easily use the product within its shelf life. If the product changes color, consistency, or develops an unusual smell, discontinue use.

— Skincarisma verdict
4.4 / 5 ★★★★☆

Verdict: Cos De BAHA S2 Salicylic Acid 2% Liquid delivers impressive value with its generous 120ml size, effective dual-BHA formula, and thoughtful addition of niacinamide and botanical extracts. It successfully balances potency with gentleness, making it an excellent choice for BHA beginners and experienced users alike. While it may not produce the fastest results compared to stronger formulas, its consistent long-term benefits, clean ingredient list, and budget-friendly price point make it a standout option in the crowded BHA market. Perfect for oily and acne-prone skin seeking clearer pores without irritation.

Product Overview

question
lightbulb What are Quick Product Notes?

Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.

muscle Pro Tip Alert!

Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.

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Quick Product Notes

Click on icons for more information
question
lightbulb What are Notable Effects & Ingredients?

Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.

We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.

muscle Pro Tip Alert!

Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.

Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you

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Notable Effects & Ingredients

anti-aging Anti-Aging from 2 ingredient(s):
Niacinamide Camellia Sinensis Leaf Extract
brightening Brightening from 2 ingredient(s):
Salicylic Acid Niacinamide
wound Promotes Wound Healing from 1 ingredient(s):
Niacinamide
ache Ache-fighting from 3 ingredient(s):
Salicylic Acid Betaine Salicylate Niacinamide
question
lightbulb What are Ingredients Related to Skin Type?

Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.

We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.

muscle Pro Tip Alert!

A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.

One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!

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Ingredients Related to Skin Types

Click on icons for more information
dry-skin Dry Skin
oily-skin Oily/Acne-Prone Skin
2 1
sensitive-skin Sensitive Skin
question
lightbulb What is the Ingredient Safety Breakdown?

Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.

muscle Pro Tip Alert!

EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.

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Ingredient Safety Breakdown

EWG Health Ratings
Low risk
Medium risk
High risk
Unknown risk
58% 8% 33%

Product ingredient list

Showing first 5 of 12 ingredients
EWG CIR Ingredient Name & Cosmetic Functions Notes
0 Unknown
Aloe Barbadensis Leaf Extract
Emollient, Humectant, Skin Conditioning
Hydrating
Redness
Irritation
1 Unknown
Propanediol
Solvent, Viscosity Controlling, Viscosity Decreasing Agent
4 B
Salicylic Acid
Skin Conditioning, Masking, Fragrance, Hair Conditioning, Antidandruff Agent, Antiacne Agent, Denaturant, Preservative, Exfoliant, Keratolytic, Corn/Callus/Wart Remover
brightening Brightening
ache Ache-fighting
Pores
1 Unknown
Betaine Salicylate
Antimicrobial Agent, Exfoliant, Keratolytic
ache Ache-fighting
1 A
Niacinamide
Skin Conditioning, Hair Conditioning, Smoothing
brightening Brightening
ache Ache-fighting
anti-aging Anti-Aging
Promotes Wound Healing
Redness
Irritation
Dark Spots
Pores
VIEW ALL INGREDIENTS