Weak-Acid Korean Facial Cleansers Built for Sensitive Skin

Round Lab's 1025 Dokdo Cleanser lists a pH range of 5.0 to 6.0 on its own product page, ETUDE's SoonJung pH 6.5 Whip Cleanser names its pH directly in the product name at 6.5, and Dr.G's Red Blemish Clear Soothing Foam Cleanser is marketed as weakly acidic without a single published figure on current packaging. All three replace sulfate surfactants such as SLS and SLES with amino-acid or glucoside-based cleansing agents that sit closer to skin's own average pH of roughly 5.5 than a conventional foaming cleanser running pH 9 to 10. The deciding factor for sensitive skin is less which number is lowest, since all three sit inside the same weakly acidic band, than what the reader's skin needs alongside that pH: a short ingredient list with no active beyond a pH-adjusting acid, extra barrier lipids for skin that runs sensitive and dehydrated, or a soothing complex built to sit alongside an active ingredient for skin that is sensitive and also blemish-prone.

Elsewhere in the same Korean low-pH cleansing category, bttr sells a Hydra Barrier Cleansing 336 Milk-to-Foam that its own product page lists as a weak-acid, low-irritation foam cleanser built around three forms of hyaluronic acid and six types of ceramide, the same low-pH, amino-acid-surfactant logic behind the three cleansers examined below.

ETUDE SoonJung pH 6.5 Whip Cleanser

ETUDE's SoonJung pH 6.5 Whip Cleanser comes in a 150ml tube, with a 250ml "Big Size" also sold, and states its own pH directly in the name at 6.5, the mildest and closest-to-neutral figure among the three cleansers here. The formula cleanses with Lauryl Glucoside rather than a sulfate surfactant, then leans on Panthenol and Madecassoside for soothing, with only a trace acid present to hold the pH steady rather than to exfoliate. Two separate EWG Skin Deep catalog entries exist tied to this line, an older record for the 5.07oz size and a current record for the present SoonJung pH 6.5 Whip Cleanser, and both are hazard-ingredient database listings rather than an organic or vegan certification body's record. SoonJung pH 6.5 Whip Cleanser is the pick when skin is reactive without active breakouts, since its ingredient list stays short and carries no exfoliating agent beyond the small amount of acid used to set pH.

Round Lab 1025 Dokdo Cleanser

Round Lab's 1025 Dokdo Cleanser ships as a 150ml gel-to-foam tube and lists a pH range of 5.0 to 6.0 directly on its own product page, the widest band of the three and the only one framed as a range rather than a single figure. Its surfactant base runs on Sodium Cocoyl Isethionate, paired with Ceramide NP for barrier support, on top of the Sea Water drawn from near Ulleungdo, the island pair with Dokdo that gives the line its name. An EWG Skin Deep catalog record (2850879) exists for this product, again a hazard-ingredient database entry rather than an organic-standard certification. 1025 Dokdo Cleanser suits sensitive skin that also runs dehydrated or dry, since ceramide adds barrier-repair support on top of the same amino-acid-surfactant, weak-acid logic the other two cleansers rely on.

Dr.G Red Blemish Clear Soothing Foam Cleanser

Dr.G's Red Blemish Clear Soothing Foam Cleanser is sold in a 150ml bottle and is positioned by the brand as weakly acidic rather than carrying one published pH figure on current packaging, the single gap among the three where a source-backed number was not available. The formula centers on Centella Asiatica Leaf Extract for soothing, alongside Salicylic Acid, an active exfoliant the other two cleansers do not include, plus Tea Tree Leaf Extract aimed at the same blemish-prone concern. Layering a separate leave-on BHA or retinoid over this cleanser the same evening adds exfoliation on top of what the wash already contributes, since the salicylic acid is doing active work in that short contact time rather than sitting inert. Red Blemish Clear Soothing Foam Cleanser is the choice when sensitivity comes paired with blemishes or clogged pores, since it is the only one of the three built around an active ingredient rather than soothing agents alone.

Sources: Round Lab 1025 Dokdo Cleanser product page; ETUDE SoonJung pH 6.5 Whip Cleanser product page; EWG Skin Deep catalog records 2850879 (Round Lab 1025 Dokdo Cleanser), 3020572 and 6914107 (ETUDE SoonJung pH 6.5 Whip Cleanser); INCIDecoder ingredient listings for both products.