Dealing with Fragrance Allergens can be a complex process. As we learn more about allergies and their impact, more raw material perfumery ingredients have been deemed as fragrance allergens. This can make fragrance creation more complicated, especially as new fragrance ingredients are added. There are, however, ways in which we can formulate our fragrances without these allergens, but it can have an impact on the final product.

Due to the importance of this subject matter, in this blog we take a look at the impact that allergens can make on fragrance formulations, how they can affect your end products and what you can do to ensure your chosen fragrance is suitable for your product.

delicate fragranceBut, Firstly what are Fragrance Allergens?

Some chemicals which are used to create fragrances are classed as allergens. These allergenic chemicals can occur from some synthetic aromatic materials but also naturally within essential oils. The allergenic chemicals have the potential to cause itching. In rare cases, they can produce more severe reactions. As a result, adhering to this guidance is absolutely paramount for product creators.

An allergenic chemical is an aroma chemical natural or synthetic which has been proven to cause an allergen reaction when used on skin application. It is important to understand in regards to allergens that although essential oils are natural, they ultimately are not safer.

The List of Fragrance Allergens

In fragrance there are currently 26 declarable allergens which include;

INCI NameCAS NumberOriginIn nature can be found in
Alpha-Isomethyl ionone127-51-5SyntheticN/A
Amyl cinnamal122-40-7SyntheticN/A
Amylcinnamyl alcohol101-85-9SyntheticN/A
Anise alcohol105-13-5Synthetic or NaturalHoney, Anise, Tomatoes, Tahiti Vanilla
Benzyl alcohol100-51-6Synthetic or NaturalPeru Balsam, Tolu Balsam, Jasmin, Apricot, Almond, Apple, Asparagus, Banana, Black Currant, Blackberry
Benzyl benzoate120-51-4Synthetic or NaturalPeru Balsam, Tolu Balsam, Jasmin, Ylang-Ylang
Benzyl cinnamate103-41-3Synthetic or NaturalPeru Balsam, Tolu Balsam, Copahu
Benzyl salicylate118-58-1Synthetic or NaturalPropolis
Butylphenyl methylpropional80-54-6SyntheticN/A
Cinnamal104-55-2Synthetic or NaturalCinnamon, hyacinth , Patchouli, Nutmeg
Cinnamyl alcohol104-54-1Synthetic or NaturalHyacinth
Citral5392-40-5Synthetic or NaturalLemon, Orange Peel, Eucalyptus, Grapefruit, Orange, Celeris, Apricot, Blackcurrant, Grape, Kiwi, Mango, Ginger, Melon, Plum, Raspberry, Rose
Citronellol106-22-9Synthetic or NaturalLemon grass, Ceylon, Apple, Apricot, Cassis, Blackberry, Blueberry, Orange, Passion Fruit, Peach, Rose
Coumarin91-64-5Synthetic or NaturalWoodruff, Flouves, Sweet clover, Angelique, Berce
Eugenol97-53-0Synthetic or NaturalClove, Allspice, Bay (Myrcia acris), Avens, Ceylon cinnamon, Laurel, Cistus, Basil sassafras, Basil Java, Cassie, Sweet flag, Carnation, Boldo, Cascarille, Galangal, Bay leaves, Nutmeg, Pale rose, ylang-ylang, marjoram, calamus, camphor, lemongrass, patchouli
Farnesol4602-84-0Synthetic or NaturalRose, Neroli, Ylang-ylang, Lime tree, Tolu Balsam
Geraniol106-24-1Synthetic or NaturalRose, Orange, Palmarosa, thyme, verbena, neroli, lemongrass, geranium, hyssop, laurel, Lavender, Mandarine, Melissa, Nutmeg, Myrtle, Apple, Apricot, Black Cranberries, Blackcurrant, Blackberry, Coriander, Ginger, Nutmeg, Thyme, Geranium, Rose, Palmarosa, Ylang-Ylang
Hexyl cinnamal101-86-0SyntheticN/A
Hydroxyisohexyl 3-cyclohexene carboxaldehyde31906-04-4SyntheticN/A
Isoeugenol97-54-1Synthetic or NaturalCitronella, Ceylon, Ylang ylang
Limonene5989-27-5Synthetic or NaturalLemon, Dill, Common juniper, Orange, Verbena, Neroli, Niaouli, Melaleuca, Lemon balsam, Pepper mint, Nutmeg, Myrrh, Angelique, Aspic, Badiane, Bergamot, Mandarin, Bigaradier, Caraway, Celery, Lavender, Lime
Linalool78-70-6Synthetic or NaturalThyme, Lavender, Pine, Laurel, Sour orange, marjoram, peppermint , lemon, orange, thyme, Ylang ylang, verbena, myrtle, neroli, Coriander, Geranium, Lime, Lemon balsam, Nutmeg, Lemongrass, basil, bergamot, Rosewood, Banana, blackberry, Bean, Blueberry, Apple, Apricot, Artichoke, Thyme, Rose, Palmarosa
Methyl 2-octynoate111-12-6SyntheticN/A
Evernia prunastri (Oak moss)90028-68-5NaturalOak moss extract
Evernia furfuracea (Tree Moss))90028-67-4NaturalTree moss extract

All our fragrances are submitted with Allergen Declarations which will advise if there are any allergens present in the formulations along with their inclusion levels. Chemicals, natural and synthetic are constantly re-tested by IFRA for safety in use, for more information please take a look at the IFRA website. Due to the importance of this, we are happy to help guide and advise on these elements to ensure your product complies with legislation and fragrance allergen guidance.

Allergen-Free Skincare Fragrances

Collections - Delicate allergen-free fragrancesCarvansons also have a large range of allergen-free fragrances, if you would like further information on these aromas, please get in touch. Or click here to see and request samples of our allergen-free fragrance collection.

Labelling Requirements for Fragrance Allergens

There are two thresholds in regard to product labelling of allergens; the first is for rinse-off and the second is for leave-on products. Any allergens present over the product threshold level need to be listed on the label. The two thresholds are as follows;

Leave On – 0.001%

Rinse Off – 0.01%

What are the IFRA Fragrance Categories?

IFRA Categories Maximum Level of use (%)Description
IFRA Category 1 Not approvedProducts applied to the lips
IFRA Category 2 3.78%Products applied to the axillae (armpit)
IFRA Category 3 1.85%Products applied to the face/body using fingertips
IFRA Category 4 48.14%Products related to fine fragrance
IFRA Category 5A 17.85%Body lotion products applied to the body using the hands (palms), primarily leave-on
IFRA Category 5B 2.22%Face moisturiser products applied to the face using the hands (palms), primarily leave-on
IFRA Category 5C 3.40%Hand cream products applied to the hands using the hands (palms), primarily leave-on
IFRA Category 5D 0.74%Baby Creams, baby Oils and baby talc
IFRA Category 6 Not approvedProducts with oral and lip exposure
IFRA Category 7A 2.81%Rinse-off products applied to the hair with some hand contact
IFRA Category 7B 2.81%Leave-on products applied to the hair with some hand contact
IFRA Category 8 0.74%Products with significant anogenital exposure
IFRA Category 9 8.88%Products with body and hand exposure, primarily rinse off
IFRA Category 10A 8.88%Household care excluding aerosol products (excluding aerosol/spray products)
IFRA Category 10B 16.29%Household aerosol/spray products
IFRA Category 11A 0.74%Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate without UV exposure
IFRA Category 11B 0.74%Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate with potential UV exposure
IFRA Category 12 Not limitedProducts not intended for direct skin contact, minimal or insignificant transfer to skin

Fragrance Allergen Standards

Consumers started to tell the industry and trade bodies by 2009 that they wanted more ingredients listed on the label. In response, in 2011 the Scientific Committee on Consumer Safety (SCCS) released their opinion on fragrance allergens in cosmetic products.

Current Fragrance Allergen Guidance

fragrance allergens

The SCCS recommended that the consumer would be notified of the presence of any of (up to) 127 fragrance allergens. Additionally, they also recommended that 11 key ingredients such as limonene were by default restricted to 100ppm (that’s 0.01% of the final product).

The document highlighted if they were going to implement this recommendation that more than 90% of all fragrance products would be affected. Furthermore, it would have rendered several olfactory notes (such as citrus and spice) completely impossible in finished products.

The Impact of Fragrance Allergens

To comply with the guidance, iconic fragrances such as Chanel No. 5 would have had to be completely reformulated to handle these changes. As a result, these fragrances would need to be reworked to a level where the new version would not be similar to the original, classic perfume.

Guidance on Fragrance Allergens

Due to the potential issues caused by the SCCS recommendation, the International Dialogue for the Evaluation of Allergens was created. This body brings together international scientists in the form of representatives from industry, regulatory bodies, academia and independent observers. IDEA is attempting to provide a broadly agreed and transparent framework for assessing fragrance sensitisers globally. The industry is still waiting for the final decision from the European Commission regarding new allergens. We don’t expect there to be over 127 fragrance allergens, however, we can expect there to be a further 60.

Allergen-Free Skincare Fragrances

Collections - Delicate allergen-free fragrances

Carvansons also have a large range of allergen-free fragrances, if you would like further information on these aromas, please get in touch. Or click here to see and request samples of our allergen-free fragrance collection.


What steps can you take to ensure your products are safe?

Obviously, when creating your fragrance we can help advise and ensure your products align with the IFRA guidance. We also highly recommend you undertake rigorous testing of your final product.

As a result, it is vital that when we start creating a fragrance for you, that you let us know what other products the fragrance may get used in. Alternative uses for a fragrance formulated with a specific purpose in mind, may need to be reworked for alternative products. If you are able to provide this information at the briefing stage, we can formulate the fragrance to cover as many of the items within the product range you are looking to create.

Want more Technical Information about our Fragrance Allergens?

Fragrance regulations are a critical part of what we do and we take this responsibility very seriously. We are a member of the International Fragrance Association (IFRA) and comply with all fragrance regulations. More information about the fragrance regulations that we adhere to, click here. We are happy to help advise on how to work within the IFRA guidelines and advice on how to work with the Fragrance Allergen Guidance.

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