FATTY ALCOHOL
Oleyl Alcohol
- fatty alcohol
A liquid fatty alcohol that adds slip and helps other oils spread.
- products in our library
- 48
- of researched products
- 0.7%
- on the label, in our leave-ins
- usually #13
- most common in
- Leave-in
- in water
- Oil-soluble
At a glance
Four things worth knowing about how this ingredient behaves on hair.
How much of it is left on hair between washes.
What it takes to get it off the hair again.
Where the class sits between an ester and a butter.
How much it slows water leaving the strand.
| Property | Level | Out of |
|---|---|---|
| Buildup risk | Needs a cleanser | 4 of 5 |
| Rinse-out behaviour | Rinses with a cleanser | 2 of 5 |
| Weight | Medium | 3 of 5 |
| Sealing | Moderate | 3 of 5 |
What it does for a formula
What Oleyl Alcohol does
The general function first, then how the role changes by product type where we have researched it.
Nothing like a drying alcohol: a waxy solid that softens and thickens.
Smooths the feel of the strand without adding hold or cleaning.
It takes a surfactant to remove, which matters on a low-detergent routine.
Hair neither pulls it in nor pushes it away.
Charge
Carries no charge, so it neither clings to hair nor is pushed away by it. Nonionic ingredients are the mild, pH-tolerant workhorses of a formula.
Solubility
Needs a surfactant to remove. On a low-detergent routine it can build up over time.
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 ? |
|---|---|---|
Leave-in
11 products
|
secondary · #13 | |
Conditioner
10 products
|
secondary · #13 | |
Mask / treatment
6 products
|
supporting · #8 | |
Shampoo
4 products
|
secondary · #16 | |
Heat protectant
3 products
|
secondary · #14 | |
Scalp treatment
3 products
|
secondary · #15 | |
Finisher: anti frizz finish
2 products
|
secondary · #19 | |
Finisher: serum
2 products
|
secondary · #15 | |
Styler: curl cream
2 products
|
secondary · #27 | |
Finisher: shine spray
1 product
|
leading · #3 |
4 more product types
| Product type | How common | Typical position on label ? |
|---|---|---|
Styler: hairspray
1 product
|
supporting · #7 | |
Styler: lotion
1 product
|
secondary · #14 | |
Styler: paste
1 product
|
supporting · #4 | |
Styler: smoothing cream
1 product
|
supporting · #5 |
| Product type | Products | Share of category | Median position | Earliest position | Band |
|---|---|---|---|---|---|
| Leave-in | 11 | 2% | 13 | 3 | secondary |
| Conditioner | 10 | 1% | 13 | 2 | secondary |
| Mask / treatment | 6 | 1% | 8 | 2 | supporting |
| Shampoo | 4 | 0% | 16 | 10 | secondary |
| Heat protectant | 3 | 1% | 14 | 3 | secondary |
| Scalp treatment | 3 | 1% | 15 | 7 | secondary |
| Finisher: anti frizz finish | 2 | 6% | 19 | 16 | secondary |
| Finisher: serum | 2 | 1% | 15 | 14 | secondary |
| Styler: curl cream | 2 | 1% | 27 | 27 | secondary |
| Finisher: shine spray | 1 | 1% | 3 | 3 | leading |
| Styler: hairspray | 1 | 0% | 7 | 7 | supporting |
| Styler: lotion | 1 | 3% | 14 | 14 | secondary |
| Styler: paste | 1 | 1% | 4 | 4 | supporting |
| Styler: smoothing cream | 1 | 1% | 5 | 5 | supporting |
We have not researched differences by product type yet. The reading below comes 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 | 5 |
| 4-8 | Supporting | 8 |
| 9-15 | Secondary | 18 |
| 16-25 | Lower | 15 |
| 26+ | Trace | 2 |
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
Formulation guidance for specific hair conditions, limited to the label positions where it applies. It is not a conclusion about any finished product, or about you.
The waxy solid that gives a conditioner its body. It deposits a soft lubricating layer, which is most of what makes hair feel smooth after rinsing.
Deposits with the cationic conditioners and helps them lie flat along the strand, which is where the detangling actually comes from.
Near the top of a conditioner it is doing most of the conditioning, and most of the weighting, at the same time.
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 seeing this ingredient tells you, what it does not, and the limits of our own method.
- a rich cream texture
- a softer feel
- something that lasts through the day
- moisture that stays on coarse or porous hair
- an exact safety score (we do not publish one for any ingredient)
- how a finished product performs, which depends on the whole formula, not one line of it
- the exact percentage in a bottle, because label position never converts into a number
- a secondary fatty alcohol, listed below the main ingredients in our leave-ins
- it was on the printed ingredient list of every product we counted (we read labels, not marketing copy)
- dryness (it is a waxy solid, not a drying alcohol)
- 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
The ingredients that most often appear alongside this one in our library. We leave out the near-universal ones, because they pair with everything and tell you nothing.
- Stearamidopropyl Dimethylamine · 28
- Hydroxyethylcellulose · 26
- Cetyl Alcohol · 26
- Polysorbate 60 · 24
- Stearyl Alcohol · 23
- Benzyl Alcohol · 21
- Glyceryl Stearate · 20
- Propylene Glycol · 19
- EDTA · 17
- Peg-2m · 16
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, give the formula body and hold, and soften the strand.
Found in these products
The most prominent placements first. The badge is the position on that product’s own ingredient list.
epres · Mask / treatment
Bond Repair Treatment
#2 on the label · $5.23/oz
epres · Conditioner
Healthy Hair Conditioner
#2 on the label · $3.22/oz
Coco & Eve · Finisher
Frizz Fix & Pro Shine Mist
#3 on the label · $5.92/oz
Curl Keeper · Heat protectant
Heat Shield Curl Protector
#3 on the label · $2.67/oz
Curl Keeper · Leave-in
Unwind - Extreme Detangling Jelly
#3 on the label · $2.42/oz
Sexy Hair · Styler
Healthy Sexy Hair Styling Paste
#4 on the label · $8.78/oz
Bumble and bumble · Styler
Brilliantine Styling Cream
#5 on the label · $16.50/oz
LADOR · Mask / treatment
Hydro LPP Treatment
#6 on the label · $1.92/oz
Color Wow · Mask / treatment
Dreaming Advanced Repair and Resurfacing Treatment
#7 on the label · $6.00/oz
Davines · Scalp treatment
CALMING Superactive
#7 on the label · $13.91/oz
Living Proof · Leave-in
Restore Repair Leave-In
#7 on the label · $8.50/oz
Phyto · Styler
PRO STYLE Laque Soie
#7 on the label · $4.64/oz
Identity
What this entry is, and what our references call it.
Oleyl Alcohol
- CAS 143-28-2
- PubChem 5284499
- emollient
- oleyl alcohol
For your hair?
Whether Oleyl Alcohol matters for your hair depends on your hair.
48 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 comes 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 5284499, CAS 143-28-2, C18H36O · accessed 2026-08-28
How this page was made
- Every number above is counted from the ingredient lists in our own product library: 48 of 6816 researched products list this ingredient. Nothing on this page is written per ingredient.
- The dots are levels, not scores. Each one comes from what kind of ingredient it is (its chemical class, charge and solubility) or from where it sits on the labels we have.
- 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. Without one, we leave the row out rather than fill it in.
- This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.
- Entry last updated 2026-09-22. Product-page methodology: the product library.
