CONDITIONING AGENT
Cetrimonium Methosulfate
- conditioning agent
A positively charged conditioning agent. Damaged hair carries a negative charge, so it deposits where the damage is and makes wet hair comb through.
- products in our library
- 22
- of researched products
- 0.6%
- on the label, in our conditioners
- usually #14
- most common in
- Conditioner
- in water
- Water-dispersible
At a glance
Four named levels, read from this ingredient’s chemical class, its charge, its solubility, or where it sits on the labels we have. More dots means more of the property named — never “better”.
How much of it is left on hair between washes.
What it takes to get it off the hair again.
Whether hair pulls it in or pushes it away — read from charge.
How much easier it makes a comb pass.
| Property | Level | Out of |
|---|---|---|
| Buildup risk | Low | 2 of 5 |
| Rinse-out behaviour | Stays where hair is damaged | 2 of 5 |
| Adhesion | Clings to damage | 5 of 5 |
| Slip | High | 5 of 5 |
What it does for a formula
What Cetrimonium Methosulfate does
The general function first, then how the role changes by product type where we have researched it.
Positive charge is drawn to the negatively charged, worn patches of a strand.
The measurable part of conditioning: less force to pull a comb through.
Positive charge holds it on the hair through the rinse.
It does not truly dissolve, and ordinary shampooing removes it.
Charge
Positively charged, so it is drawn to the negatively charged, damaged areas of hair and stays behind after rinsing. That is why conditioning happens where the wear is.
Solubility
Spreads through water without truly dissolving, and normal shampooing removes it.
Where it appears
Where it appears
One row per product category in our library: how many products list it, what share of that category that is, and where it typically sits on the label.
| Product type | How common | Typical position on label ? |
|---|---|---|
Conditioner
7 products
|
secondary · #14 | |
Mask / treatment
7 products
|
secondary · #24 | |
Heat protectant
3 products
|
secondary · #17 | |
Leave-in
2 products
|
secondary · #21 | |
Styler: smoothing cream
2 products
|
secondary · #14 | |
Finisher: shine spray
1 product
|
secondary · #36 |
| Product type | Products | Share of category | Median position | Earliest position | Band |
|---|---|---|---|---|---|
| Conditioner | 7 | 1% | 14 | 6 | secondary |
| Mask / treatment | 7 | 2% | 24 | 10 | secondary |
| Heat protectant | 3 | 2% | 17 | 16 | secondary |
| Leave-in | 2 | 0% | 21 | 14 | secondary |
| Styler: smoothing cream | 2 | 4% | 14 | 12 | secondary |
| Finisher: shine spray | 1 | 2% | 36 | 36 | secondary |
No product-type differences have been researched yet — the reading below is computed from where it sits on the labels in our library.
Position footprint
Every listing in our library, by position on the label.
| Positions | Zone | Listings |
|---|---|---|
| 1-3 | Leading | 0 |
| 4-8 | Supporting | 2 |
| 9-15 | Secondary | 9 |
| 16-25 | Lower | 9 |
| 26+ | Trace | 7 |
How to read this
US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order.
So position tells you about relative amount only above that line, and we never convert a position into a percentage.
Who should pay attention
Conditional formulation guidance, scoped to a hair condition and to the positions where it is meaningful. It is not a conclusion about any finished product, and not a conclusion about you.
A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.
The class that does the detangling in a conditioner. It deposits lubrication where the cuticle is worn.
Substantive by design. A routine with no detergent wash gives it nothing to leave with.
Detangling and weight come from the same deposit; how much of each depends on the chain length of the specific conditioner.
Read where it is listed in the first three ingredients or positions 4–8.Read from this ingredient’s chemical class. Where we have researched the ingredient itself, that reading replaces the class one.
Why it matters to shoppers
What this ingredient is evidence of, what it is not evidence of, and what our own method can and cannot tell you.
- detangling
- thick or coarse hair
- detangling and less breakage from combing
- a product ordinary shampooing removes
- an exact safety score — we do not publish one, for any ingredient
- how a finished product performs by itself — that is the whole formula, not one line of it
- the exact percentage in a bottle — label position never converts into a number
- a secondary conditioner, listed below the main ingredients in our conditioners
- it was on the label of every product we counted — we read printed ingredient lists, not marketing copy
- it is meant to stay on the hair rather than rinse away
- that a product is right or wrong for you
We do not publish safety scores or hazard grades. Where a regulator has published a restriction or a use condition, we state it and cite it; otherwise we describe what the ingredient does and stop.
Commonly paired with
Ingredients that appear alongside this one most often in our library. Near-universal ingredients are excluded — they pair with everything and tell you nothing.
- Quaternium-91 · 22
- Cetrimonium Chloride · 13
- Polyquaternium-37 · 10
- Cetyl Alcohol · 10
- Hydroxyethylcellulose · 8
- Caprylyl Glycol · 8
- Disodium EDTA · 8
- PPG-1 Trideceth-6 · 7
- Behentrimonium Methosulfate · 7
- Propanediol · 7
The number beside a name is how many products in our library list both.
These ingredients tend to appear together to improve feel after rinsing, soften the strand, and give the formula body and hold.
Found in these products
The most prominent placements first. The badge is the position on that product’s own ingredient list.
Paul Mitchell · Conditioner
Super Smooth Conditioner
#6 on the label · $1.78/oz
Coco & Eve · Mask / treatment
Bond Building Pre-Shampoo Treatment
#7 on the label · $5.91/oz
As I Am · Conditioner
Hydration Elation Conditioner
#9 on the label · $1.62/oz
CurlyKids · Mask / treatment
Curly Deep Conditioner
#10 on the label
Paul Mitchell · Styler
Quick Slip Styling Cream
#12 on the label · $4.51/oz
John Frieda · Conditioner
Brilliant Brunette Color Vibrancy Conditioner
#13 on the label · $1.30/oz
Act+Acre · Conditioner
Daily Hydro™ Hydrating Conditioner
#14 on the label · $3.80/oz
CurlyKids · Leave-in
Curly Creme Conditioner
#14 on the label · $0.83/oz
R+Co · Conditioner
ATLANTIS Moisturizing B5 Conditioner
#14 on the label · $4.00/oz
R+Co · Mask / treatment
Sunset Blvd Blonde Toning Masque
#14 on the label · $6.19/oz
IGK · Styler
Beach Club Bouncy Blowout Cream
#15 on the label · $6.44/oz
Kerastase · Conditioner
Resistance Fondant Extentioniste Conditioner
#16 on the label · $6.40/oz
See all 22 products in the library that list Cetrimonium Methosulfate
Identity
What this entry is, and what our references call it.
Cetrimonium Methosulfate
- CAS 65060-02-8
- PubChem 103114
- cetrimonium methosulfate
For your hair?
Whether Cetrimonium Methosulfate matters for your hair depends on your hair.
22 products in our library list itWhat this ingredient does, and where it sits on the labels we have researched.
A verdict on any product that contains it, and never a safety grade.
We do not physically test your hair. Everything above is read from the ingredient lists in our library and from published references — the consultation is what turns it into a plan.
References
Sourced Backed by a manufacturer or regulatory source.
This ingredient
- Manufacturer or regulatory PubChem — Compound identity: CID 103114, CAS 65060-02-8, C20H45NO4S · accessed 2026-08-28
How this page was made
- Every number above is counted from the ingredient lists in our own product library — 22 of 3889 researched products list this ingredient. Nothing on this page is written per ingredient.
- The dots are named levels read from an ingredient’s chemical class, charge, solubility, or where it sits on the labels we have — never a score.
- US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order. Position tells you about relative amount only above that line, and we never convert a position into a percentage.
- The prominence bands (leading, supporting, secondary) are the same ones the product pages use to read a single label, applied here to the median position across a category.
- We do not publish safety scores or hazard grades. Where a regulator has published a restriction or a use condition, we state it and cite it; otherwise we describe what the ingredient does and stop.
- Identifiers and references appear only when a published source is attached to this entry; where none is, the row is simply absent rather than filled in.
- This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.
- Entry last updated 2026-08-28. Product-page methodology: the product library.