Ingredient review
Isopropyl Cinnamate
INCI: ISOPROPYL CINNAMATE
Isopropyl Cinnamate is a synthetic fragrance ingredient that adds a sweet, balsamic scent to products, but it may cause skin irritation in sensitive individuals.
In plain English
Isopropyl Cinnamate is a man-made ingredient that gives skincare products a pleasant, sweet, balsamic smell. It also helps soften the skin by acting as an emollient, which means it helps keep moisture in. However, because it's a fragrance ingredient, it can sometimes cause irritation or allergic reactions, especially on sensitive skin.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Isopropyl Cinnamate can be useful, but watch for some irritation potential.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Isopropyl Cinnamate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Isopropyl Cinnamate is a synthetic ester derived from cinnamic acid and isopropyl alcohol. It is primarily used in cosmetics and personal care products as a fragrance ingredient, contributing a sweet, balsamic, and slightly spicy scent. It also functions as a skin-conditioning agent (emollient).
How it works
In a cosmetic product, Isopropyl Cinnamate works in two main ways: as a fragrance, it evaporates and releases its scent; as an emollient, it sits on the skin's surface, helping to soften and smooth by reducing water loss. It does not penetrate deeply into the skin.
Pros
Pleasant scent
Adds a sweet, balsamic aroma that can enhance the sensory experience of a product.
Light emollient
Helps soften the skin without feeling heavy or greasy, making it suitable for lotions and creams.
Cons and cautions
Irritation risk
As a fragrance ingredient, it can cause redness, itching, or stinging, especially on sensitive or compromised skin.
Allergen potential
May trigger allergic reactions in people with fragrance sensitivities, leading to contact dermatitis.
Best for
- Those who enjoy scented skincare and have no history of fragrance allergies
- People with normal to oily skin looking for a light emollient
Use caution if
- Individuals with sensitive skin or known fragrance allergies
- Anyone with a history of contact dermatitis from fragrances
Usage tips
Safety summary
Isopropyl Cinnamate is generally considered safe for use in cosmetics at low concentrations, but it carries a moderate risk of skin irritation and allergic reactions, particularly for those with fragrance sensitivities. Regulatory bodies allow its use with standard safety assessments.
Research notes
Research indicates that Isopropyl Cinnamate can cause skin sensitization in some individuals, similar to other fragrance esters. Studies are limited, but it is not classified as a potent allergen. Most safety data come from industry assessments and regulatory reviews.
Common label clues
- Typical concentration
- Typically used at low levels (under 1%) due to its fragrance role
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (CosIng) as a fragrance ingredient, subject to concentration limits and labeling requirements for allergens.
- Common uses
- Fragranced products, Lotions, Creams
- Environmental note
- As a synthetic compound, its environmental impact is not well-studied, but it is not known to be bioaccumulative or toxic to aquatic life at typical use levels.
Good to know
- Isopropyl Cinnamate is often used in very low concentrations (under 1%) because its primary role is fragrance.
- It is not the same as cinnamic acid or cinnamon oil, though it shares a similar scent profile.
Common questions
What is Isopropyl Cinnamate in beauty products?
Isopropyl Cinnamate is a man-made ingredient that gives skincare products a pleasant, sweet, balsamic smell. It also helps soften the skin by acting as an emollient, which means it helps keep moisture in. However, because it's a fragrance ingredient, it can sometimes cause irritation or allergic reactions, especially on sensitive skin.
What does Isopropyl Cinnamate do in a beauty product?
In a cosmetic product, Isopropyl Cinnamate works in two main ways: as a fragrance, it evaporates and releases its scent; as an emollient, it sits on the skin's surface, helping to soften and smooth by reducing water loss. It does not penetrate deeply into the skin.
Is Isopropyl Cinnamate safe for most people?
Isopropyl Cinnamate is generally considered safe for use in cosmetics at low concentrations, but it carries a moderate risk of skin irritation and allergic reactions, particularly for those with fragrance sensitivities. Regulatory bodies allow its use with standard safety assessments.
Who should be careful with Isopropyl Cinnamate?
Individuals with sensitive skin or known fragrance allergies Anyone with a history of contact dermatitis from fragrances
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.