What is C12-14 Alketh-12?
Surfactant, emulsifying
C12-14 Alketh-12 is an emulsifier that mixes oil and water into one texture.
This ingredient is listed in CosIng, the EU's cosmetic ingredient database. CosIng lists what it's used for as: Surfactant, emulsifying.
CosIng function classes are the EU's standard list of the jobs an ingredient does inside a product, such as moisturizing, emulsifying, or preserving.
Anything to watch out for?
Some products' ingredient lists mark this ingredient as below. If a mark's reason fits your skin, it is the ingredient to weigh in those products.
- This ingredient is on pore-clogging ingredient lists, which matters most for skin that breaks out easily.
- Marked this way on 2 products.
Each mark comes from matching the product's full ingredient list against lists for fragrance, labeled fragrance allergens, drying alcohols, essential oils, fungal acne, pore clogging, and pregnancy caution.
Which products feature it?
2 of the 2320 products we've checked feature this as a key ingredient. Products that disclose a concentration or list it near the top of the ingredient list come first.
Showing 1 to 2.
cecith
Waterlock First Serum
It's made for better hydration.
Key: C12-14 Alketh-12 (#19 on the ingredient list), Jojoba Seed Oil, Hyaluronic Acid
41 claims, summarized
- Only partly backed:
- better hydration (amount unknown)
- Don't count on:
- better barrier support
- Tests passed:
- hypoallergenic · skin irritation
See each claim
claims, checked
STEP 2 Drawing in moisture: 10-fold hyaluronic acid / With 10-fold hyaluronic acid subdivided by molecular size, a stepwise moisturizing design that fills every skin layer without gaps
backed by evidenceSesed Water Lock First Serum is not a foam for the sake of foaming.
backed by evidenceSesed Water Lock First Serum is a bubble created by gently pushing up a two-phase formulation containing oil and water together through the physical structure of a pump container. The foaming is the normal feel of Water Lock First Serum.
backed by evidenceUnlike high concentrations where cleansing power is expressed, Sesed used only an extremely small amount of 0.3% or less in total, solely for emulsification · stabilization purposes.
backed by evidenceHigh-content cleansing surfactants / SLS SLES / ethanol / silicone
backed by evidenceLow-irritation test completed
backed by evidenceA. If abnormal symptoms or side effects such as red spots, swelling, or itching occur on the used area during or after use of the cosmetic, or due to direct sunlight, consult a specialist, etc.
backed by evidenceWhat matters is which surfactant ingredient was used, for what purpose, and how much.
backed by evidenceMoisture serum that fills, without any chance to dry, the moisture golden time that begins right after facial cleansing
plausible, not testedAfter more than 20 rounds of sampling, we formulated it in a form that delivers stable emulsifying power with the smallest amount.
plausible, not testedFSC-certified eco-friendly paper & soy ink for sustainable beauty and forest protection
plausible, not testedWe did not compromise. Completed after over a year of development and dozens of rounds of sampling.
plausible, not testedFor dry skin, layer 5-7 times in small amounts. When reapplied after absorption, the moisture sensation rises even deeper.
plausible, not testedFor oily/combination skin, lightly layer 2-3 times. Fill with moisture only and finish fresh.
plausible, not tested* FSC certification: An international certification with 10 principles and 56 standards including biodiversity preservation of forests, an eco-friendly certification mark granted to paper and goods produced sustainably.
plausible, not testedTriple moisture-locking design key to skin barrier improvement
partly backedSesed's proposed 3-STEP Water Lock system for improving inner dryness
partly backedSTEP 3 Locking in moisture: Jojoba oil & Squalane / A step that maintains moisture for a long time by balancing oil and water with jojoba oil and squalane
partly backedSkin irritation index 0.00%
partly backedNO artificial colors & fragrances / White, high-concentration formulation realized with efficacy ingredients / Low-irritation formula without added fragrances
partly backedA blend of 10-fold hyaluronic acid, jojoba, and squalane for oil-water balance. A first serum that moisturizes the skin with minerals and aquaporin that open the moisture pathway.
partly backed10-fold hyaluronic acid barrier · moisture serum
partly backedDaily Care: After cleansing, use within 3 seconds while a little moisture remains. It boosts the natural water glow and makeup adherence in one go.
partly backedWithout a doubt, the world's most perfect skin barrier strengthening solution
overstated3 seconds a day ends inner dryness!
overstatedDefinite inner dryness resolution, immediate improvement in just 30 seconds*
overstatedThe No. 1 brand drawing the most attention in 2026, Sesed
no supporting source foundSold out nationwide immediately upon entering pharmacies
no supporting source foundReal-time sales No.1 noticed by The Hyundai
no supporting source foundAt the moment of application, real moisture that fills from the inside, not the outside
no supporting source foundSTEP 1 Opening the moisture path: Minerals & Aquaporin / Designed with minerals from sea salt and deep-sea water, a moisture path considering aquaporin, the skin's internal water channel
no supporting source foundAfter 30 seconds of use, evaluation of improvement in skin surface moisture, evaluation of improvement in inner dryness (inner moisture)
no supporting source foundWe listened to the many skin concerns of 150,000 friends, used them ourselves, and went through repeated improvement cycles.
no supporting source foundK-pharmacy sold-out frenzy barrier serum
no supporting source foundThose who have used it say it is definitely different: irreplaceable, sold-out lines
nothing specific to checkChewy bubble completes moisture radiance, new-concept first serum that fills from the skin barrier
nothing specific to checkSkin barrier care routine for resolving inner dryness
nothing specific to checkMany moisturizers fill, but why is there none that opens the moisture pathway?
nothing specific to checkNo matter how good the ingredients, if the 'path' is blocked, it's useless, so we've fully contained the entire moisturizing process in one bottle, from opening the moisture pathway to locking the balance.
nothing specific to checkSesed's clean beauty practice
nothing specific to checkThe standard completed in that process was one: 'Balance that sets the skin barrier right'
nothing specific to check
Key: C12-14 Alketh-12 (#21 on the ingredient list), Cocamidopropyl Hydroxysultaine, Myristamine Oxide
2 claims checked
claims, checked
When cleansing point makeup, press lightly for about 10 seconds to melt the makeup, then wipe gently.
backed by evidenceIt is a no-wash type cleansing water that does not require a separate water rinse, but if needed you may finish with lukewarm water or do a light second cleanse.
partly backed
