Ingredient on hair labels

Guar Hydroxypropyltrimonium Chloride

TheWashDay editorial · Updated · From the EU ingredient register and the makers’ own labels · How we match names

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Guar Hydroxypropyltrimonium Chloride is on 48 of the 177 hair-product labels we compare, from 18 makers. Its uses in the EU ingredient register include antistatic, film forming and viscosity controlling. None of these labels names it among its first five ingredients.

What it is

In the register’s words: “Guar gum, 2-hydroxy-3-(trimethylammonio)propyl ether, chloride.”

CAS number
65497-29-2
EC number
-

What the register lists it for

These are the uses the European Commission’s CosIng register lists for Guar Hydroxypropyltrimonium Chloride in any cosmetic, hair roles first. They say why a maker might add it, not what it does in one formula, and they aren’t a safety rating.

Antistatic

Cuts the static that makes dry hair fly away. Many conditioning ingredients carry this role too, because both work at the hair’s surface.

Register definition: “Preventing and/or reducing static electricity by neutralising electrical charge on surfaces.”

Film forming

Leaves a thin, continuous film on the hair as it dries. Polymers in gels and foams carry it; the film is what feels like a cast.

Register definition: “Producing (upon application) a continuous film on the skin, hair or nails.”

Viscosity controlling

Makes a product thicker or thinner, so a gel holds its shape or a shampoo pours. Gums, cellulose and some salts carry this role.

Register definition: “Increasing or decreasing the viscosity (thickness) of cosmetics.”

Skin conditioning

The register’s broad role for ingredients that keep skin in good condition. On a hair label it often sits beside a hair role, or marks a plant oil or extract.

Register definition: “Maintaining the skin in good condition.”

Where it sits on each label

US labels list ingredients from most to least, except that those at 1% or less may follow in any order. A name near the top is a large part of the formula. A label doesn’t mark where the 1% point falls, so further down, the order says little about how much is in it.

Every label, product by product (48)

Each line runs from the first name on a label to the last; a dot is where this ingredient sits. Makers change formulas now and then; if the list on your bottle differs, go by your bottle.

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Other antistatic ingredients on these labels

Updated · The name, numbers and uses come from the European Commission’s CosIng entry (CC BY 4.0); we write the uses in US spelling and put the hair ones first. The labels are each maker’s own. The order rule is the FDA’s Cosmetics Labeling Guide. All our sources are on the Sources page.