What it is
The register’s chemical name for it: “Coumarin; 2H-1-Benzopyran-2-one.”
- EU register name (INCI)
- COUMARIN
- CAS number
- 91-64-5
- EC number
- 202-086-7
- Other names in the register
- 2H-1-Benzopyran-2-one
What the register lists it for
These are the uses the European Commission’s CosIng register lists for Coumarin 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.
- Perfuming
-
Used as a perfume or scent material. Essential oils and their scent compounds, such as linalool and limonene, carry this role.
Register definition: “Used for perfume and aromatic raw materials.”
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.
- Shampoos 1 label First five names: 0 of 1 Shampoos without it
- Deep conditioners 3 labels First five names: 0 of 3 Deep conditioners without it
- Leave-in conditioners 3 labels First five names: 0 of 3 Leave-in conditioners without it
- Stylers 5 labels First five names: 0 of 5 Stylers without it
- Heat protectants 1 label First five names: 0 of 1 Heat protectants without it
- Hair oils 1 label First five names: 0 of 1 Hair oils without it
- Curl refreshers 1 label First five names: 0 of 1 Curl refreshers without it
Every label, product by product (15)
- Cantu Ultra Moisture Nourishing Shampoo Shampoo 28th of 31 names
- Aunt Jackie's Coco Repair Coconut Creme Deep Conditioner Deep conditioner 32nd of 33 names
- Cantu Ultra Moisture Nourishing Mask Deep conditioner 26th of 26 names
- DevaCurl Melt Into Moisture Deep conditioner 41st of 41 names
- Cantu Ultra Moisture Nourishing Leave-In Conditioner Leave-in conditioner 35th of 37 names
- As I Am Leave-In Conditioner Leave-in conditioner 24th of 25 names
- PATTERN Leave-In Conditioner Leave-in conditioner 43rd of 43 names
- TRESemmé Bouncy Curls Defining Cream Styler 22nd of 25 names
- TRESemmé Bouncy Curls Air Dry Foam Styler 15th of 17 names
- As I Am Curling Jelly Styler 18th of 19 names
- Cécred Moisture Sealing Lotion Styler 46th of 48 names
- Cantu Ultra Moisture Nourishing Curl Cream Styler 30th of 30 names
- Curlsmith Curlshield Cream Heat protectant 29th of 37 names
- Cécred Nourishing Hair Oil Hair oil 29th of 31 names
- PATTERN Hydrating Mist Curl refresher 52nd of 52 names
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.
Your next step
Other perfuming ingredients on these labels
- Linalool 63 labels
- Citronellol 24 labels
- Geraniol 24 labels
- Hexyl Cinnamal 21 labels
- Benzyl Salicylate 12 labels
- Linum Usitatissimum (Linseed) Seed Oil 11 labels
- Amyl Cinnamal 9 labels
- Alpha-Isomethyl Ionone 7 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.