Overview
What it is
Toner with 5 ingredients
Cool Features
It is vegan, cruelty-free, fungal acne (malassezia) safe, and reef safe
Suited For
It has ingredients that are good for fighting acne
Free From
It doesn't contain any harsh alcohols, common allergens, fragrances, oils, parabens, silicones or sulfates
Fun facts
Prequel is from United States. This product is used in 733 routines created by our community.
We independently verify ingredients and our claims are backed by peer-reviewed research. Does this product need an update? Let us know.
What's inside
Benefits
Concerns
Ingredients Explained
Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterHypochlorous Acid is created from dissolving chlorine in water. It is a weak acid that has antimicrobial properties.
Due to its ability to kill bacteria, it can be used to treat acne. We recommend speaking with a professional if you have any concerns or questions.
Fun fact: Hypochlorous acid naturally exists in our bodies. It is created by white blood cells to protect us from infections and bacteria.
Learn more about Hypochlorous AcidChances are, you eat sodium chloride every day. Sodium Chloride is also known as table salt.
This ingredient has many purposes in skincare: thickener, emulsifier, and exfoliator.
You'll most likely find this ingredient in cleansers where it is used to create a gel-like texture. As an emulsifier, it also prevents ingredients from separating.
There is much debate on whether this ingredient is comedogenic. The short answer - comedogenic ratings don't tell the whole story. Learn more about comegodenic ratings here.
The concensus about this ingredient causing acne seems to be divided. Research is needed to understand if this ingredient does cause acne.
Scrubs may use salt as the primary exfoliating ingredient.
Learn more about Sodium ChlorideSodium phosphate is a group of inorganic sodium salts (mono, di, and tri-sodium phosphate). It has pH buffering, chelating, and stabilizing properties.
This means it helps maintain a formula's acidity, enhances preservative performance, and prevents unwanted changes caused by metal ions or hard water.
Sodium phosphate is considered safe for use in cosmetics according to the Cosmetic Ingredient Review (CIR); it also has a long-established food-grade safety rating as well.
Though some sources claim sodium phosphate can help "energize skin cells", this claim is not strongly supported by independent scientific studies.
Learn more about Sodium PhosphateDisodium Phosphate is a water-soluble powder used as a pH adjuster.
Reviews
Where it's from
Prequel is a American brand
Product acidity level
This product has a PH level of 5.5
Often compared with
We're dedicated to providing you with the most up-to-date and science-backed ingredient info out there.
The data we've presented on this page has been verified by a member of the SkinSort Team.
Read more about usยท Updated November 2, 2025 • Added by Clover
