Skip to main content
. 2017 Aug 4;1(2):190–199. doi: 10.5414/ALX01604E

Table 2. Known contact allergens in humans: extracts (essential oils). Substances with an “alarming” prevalence of sensitization (100 – 1,000 reported cases: +++; > 1,000 reported cases: ++++) are presented in bold. r.t. = rarely tested.

INCI name (or, if no INCI name exists, usual name according to CosIng) CAS number Number of cases (see text)
Cananga odorata (ylang-ylang oil) 83863-30-3; 8006-81-3 +++
Cedrus atlantica bark oil (cedar oil) 92201-55-3; 8000-27-9 ++
Cinnamonum cassia leave oil (cassia oil) Cinnamonum zeylanicum bark oil (cinnamon oil) 8007-80-5 84649-98-9 ++ (r.t.)
Citrus aurantium amara flower/peel oil (neroli oil) 8016-38-4; 72968-50-4 ++
Citrus bergamia peel oil expressed (bergamot oil) 89957-91-5 + (r.t.)
Citrus limonum peel oil expressed (lemon oil) 84929-31-7 ++
Citrus sinensis (syn.: aurantium dulcis) peel oil expressed (Orange oil) 97766-30-8; 8028-48-6 ++
Cymbopogon citratus/schoenanthus oils (lemongrass oil) 89998-14-1; 8007-02-1; 89998-16-3 ++
Eucalyptus spp. leaf oil (eucalyptus oil) 92502-70-0; 8000-48-4 ++
Eugenia caryophyllus leaf/flower oil (clove oil) 8000-34-8 +++
Evernia furfuracea extract (tree moss) 90028-67-4 +++
Evernia prunastri extract oak moss) 90028-68-5 +++
Jasminum grandiflorum/officinale (jasmin abs.) 84776-64-7; 90045-94-6; 8022-96-6 +++
Juniperus virginiana (cedarwood oil) 8000-27-9; 85085-41-2 ++
Laurus nobilis (laurel oil) 8002-41-3; 8007-48-5; 84603-73-6 ++
Lavandula hybrida (lavandula hybrida extract) 91722-69-9 + (r.t.)
Lavandula officinalis (lavandula angustifolia herb extract) 84776-65-8 ++
Mentha piperita (peppermint oil) 8006-90-4; 84082-70-2 ++
Mentha spicata (spearmint oil) 84696-51-5 ++
Myroxylon pereirae (extracts, distillates) (Balsam of Peru) 8007-00-9; ++++
Narcissus spp. (Narcissus abs.) miscellaneous ++
Pelargonium graveolens (geranium oil Bourbon) 90082-51-2; 8000-46-2 ++
Pinus mugo/pumila (pinus mugo twig leaf extract) 90082-72-7/97676-05-6 ++
Pogostemon cablin (patchouli oil) 8014-09-3; 84238-39-1 ++
Rose flower oil (Rosa spp.) (rose oil) miscellaneous ++
Santalum album (sandalwood oil) 84787-70-2; 8006-87-9 +++
Turpentine (oil) 8006-64-2; 9005-90-7; 8052-14-0 ++++