DRYING ALCOHOL
Isopropyl Alcohol
- drying alcohol
A fast-evaporating alcohol used as a solvent and to speed drying. Well down the list it is a processing aid; near the top it can leave hair feeling dry.
- products in our library
- 510
- of researched products
- 13%
- on the label, in our conditioners
- usually #15
- most common in
- Conditioner
- in water
- Volatile
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.
How fast it leaves after the product is applied.
What is still on the hair once it has evaporated.
| Property | Level | Out of |
|---|---|---|
| Buildup risk | None left behind | 1 of 5 |
| Rinse-out behaviour | Rinses clean | 5 of 5 |
| Drying speed | Fast | 5 of 5 |
| Residue | None | 1 of 5 |
What it does for a formula
What Isopropyl Alcohol does
The general function first, then how the role changes by product type where we have researched it.
Lets a spray dry quickly; it does not stay on the hair.
What everything else is dissolved in before it reaches your hair.
It carries the formula onto the hair and then leaves.
Charge
Charge is not recorded for this ingredient.
Solubility
Evaporates after application rather than staying on the hair, so it leaves nothing behind to remove.
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
210 products
|
secondary · #15 | |
Mask / treatment
119 products
|
secondary · #14 | |
Leave-in
57 products
|
secondary · #16 | |
Shampoo
28 products
|
secondary · #33 | |
Heat protectant
22 products
|
secondary · #17 | |
Co-wash
17 products
|
secondary · #15 | |
Styler: curl cream
11 products
|
secondary · #22 | |
Finisher: serum
10 products
|
secondary · #14 | |
Styler: smoothing cream
9 products
|
secondary · #30 | |
Styler: volumizer
6 products
|
secondary · #16 |
8 more product types
| Product type | How common | Typical position on label ? |
|---|---|---|
Scalp treatment
5 products
|
secondary · #17 | |
Styler: mousse
5 products
|
secondary · #19 | |
Styler: gel
4 products
|
secondary · #18 | |
Styler: hairspray
2 products
|
supporting · #6 | |
Styler: texture spray
2 products
|
secondary · #29 | |
Finisher: anti frizz finish
1 product
|
secondary · #46 | |
Finisher: oil
1 product
|
secondary · #12 | |
Finisher: shine spray
1 product
|
secondary · #10 |
| Product type | Products | Share of category | Median position | Earliest position | Band |
|---|---|---|---|---|---|
| Conditioner | 210 | 30% | 15 | 5 | secondary |
| Mask / treatment | 119 | 30% | 14 | 5 | secondary |
| Leave-in | 57 | 13% | 16 | 7 | secondary |
| Shampoo | 28 | 3% | 33 | 19 | secondary |
| Heat protectant | 22 | 15% | 17 | 9 | secondary |
| Co-wash | 17 | 17% | 15 | 4 | secondary |
| Styler: curl cream | 11 | 10% | 22 | 10 | secondary |
| Finisher: serum | 10 | 12% | 14 | 7 | secondary |
| Styler: smoothing cream | 9 | 16% | 30 | 16 | secondary |
| Styler: volumizer | 6 | 9% | 16 | 4 | secondary |
| Scalp treatment | 5 | 3% | 17 | 13 | secondary |
| Styler: mousse | 5 | 4% | 19 | 12 | secondary |
| Styler: gel | 4 | 3% | 18 | 6 | secondary |
| Styler: hairspray | 2 | 2% | 6 | 6 | supporting |
| Styler: texture spray | 2 | 3% | 29 | 25 | secondary |
| Finisher: anti frizz finish | 1 | 4% | 46 | 46 | secondary |
| Finisher: oil | 1 | 1% | 12 | 12 | secondary |
| Finisher: shine spray | 1 | 2% | 10 | 10 | 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 | 84 |
| 9-15 | Secondary | 193 |
| 16-25 | Lower | 178 |
| 26+ | Trace | 126 |
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.
Evaporates on contact, which is how a spray sets almost instantly and leaves no weight behind it.
Porous hair gives water up easily as it is; a fast-evaporating solvent high on the list accelerates that.
Read where it is listed in the first three ingredients or positions 4–8.It evaporates quickly and takes some water with it. On hair already short of moisture, a formula built on a lot of it can finish drier than it started.
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.
- a spray that dries almost instantly
- a light, fast-drying formula
- nothing left on the hair
- body without weight on fine hair
- 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 volatile alcohol, 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 a carrier, not something left on the hair
- damage — this class evaporates rather than staying on hair
- 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.
Why some people avoid it
A fast-evaporating solvent. It thins a formula so it sprays, and it makes a styling product set quickly instead of staying wet.
It evaporates fast, and it can take water with it. On hair that is already dry or damaged, a product built on a lot of it can leave the strand drier than it started.
Where regulators stand: Permitted and unrestricted. The fatty alcohols — cetyl, cetearyl, stearyl — share the word and do the opposite job; they are conditioning, and this reading does not count them.
A formulation preference, not a regulatory finding
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.
- Behentrimonium Chloride · 430
- Cetrimonium Chloride · 232
- Cetyl Alcohol · 190
- Tocopherol · 189
- Benzyl Alcohol · 182
- Amodimethicone · 170
- Propylene Glycol · 158
- Dimethicone · 148
- Sodium Hydroxide · 148
- Hexyl Cinnamal · 148
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 deliver a stated effect.
Found in these products
The most prominent placements first. The badge is the position on that product’s own ingredient list.
Goldwell · Conditioner
Bond Pro Fortifying Conditioner
#4 on the label · $1.41/oz
Oribe · Styler
Maximista Thickening Spray
#4 on the label · $6.18/oz
Wella · Co-wash
Nutricurls Waves & Curls Cleansing Conditioner
#4 on the label · $1.96/oz
Matrix · Conditioner
A Curl Can Dream Weightless Moisture Conditioner For Waves
#5 on the label · $2.18/oz
Matrix · Mask / treatment
Instacure Build-A-Bond Instant Revival Liquid Mask
#5 on the label · $2.66/oz
Nioxin · Mask / treatment
Anti-breakage Strengthening Mask
#5 on the label · $3.13/oz
Nioxin · Conditioner
Nioxin Scalp + Hair Thickening System 1 Conditioner
#5 on the label · $1.57/oz
Nioxin · Conditioner
Nioxin Scalp + Hair Thickening System 2 Conditioner
#5 on the label · $1.57/oz
Nioxin · Conditioner
Nioxin System 3 Scalp Therapy Conditioner
#5 on the label · $2.13/oz
Wella Professionals · Conditioner
Nutricurls Detangling Conditioner
#5 on the label · $3.88/oz
Wella Professionals · Conditioner
Oil Reflections Luminous Instant Conditioner
#5 on the label · $3.87/oz
Creme of Nature · Mask / treatment
Acai Berry & Keratin Strengthening Hair Masque
#6 on the label · $1.14/oz
See all 510 products in the library that list Isopropyl Alcohol
Identity
What this entry is, and what our references call it.
Isopropyl Alcohol
- CAS 67-63-0
- PubChem 3776
- solvent
- isopropyl alcohol
- isopropyl alcohol (incidental)
For your hair?
Whether Isopropyl Alcohol matters for your hair depends on your hair.
the 4th most-listed solvent or propellant in our libraryWhat 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 3776, CAS 67-63-0, C3H8O · accessed 2026-08-28
How this page was made
- Every number above is counted from the ingredient lists in our own product library — 510 of 3928 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.