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

Table 1. Known contact allergens in humans: single substances. Substances with an “alarming” prevalence of sensitization (100 – 1,000 reported cases: +++; > 1,000 reported cases: ++++) are presented in bold. ox. = oxidized; n.-ox. = nonoxidized; r.t. = rarely tested.

INCI name (or, if no INCI name exists, usual name according to CosIng)	CAS number	Number of cases (see text)
Acetylcedrene	32388-55-9	+
Amyl cinnamal	122-40-7	++
Amyl cinnamyl alcohol	101-85-9	++
Amyl salicylate	2050-08-0	+
trans-anethole	4180-23-8	+ (r.t.)
Anise alcohol	105-13-5	+
Benzaldehyde	100-52-7	+
Benzyl alcohol	100-51-6	++
Benzyl benzoate	120-51-4	++
Benzyl cinnamate	103-41-3	++
Benzyl salicylate	118-58-1	++
Butylphenyl methylpropional (e.g., Lilial ^®)	80-54-6	++
Camphor	76-22-2/464-49-3	+ (r.t.)
beta-Caryophyllene	87-44-5	n.-ox.: + ox.: +
Carvone	99-49-0/6485-40-1/2244-16-8	+ (r.t.)
Cinnamal	104-55-2	+++
Cinnamyl alcohol	104-54-1	+++
Citral	5392-40-5	+++
Citronellol	106-22-9/1117-61-9/7540-51-4	++
Coumarin	91-64-5	+++
Rose Ketone-4 (Damascenone)	23696-85-7	+ (r.t.)
alpha-Damascone (TMCHB)	43052-87-5/23726-94-5	++
cis-beta-Damascone	23726-92-3	+
delta-Damascone	57378-68-4	+
Dimethylbenzyl carbinyl acetate (DMBCA)	151-05-3	+
Eugenol	97-53-0	+++
Farnesol	4602-84-0	+++
Geraniol	106-24-1	+++
Hexadecanolactone	109-29-5	+ (r.t.)
Hexamethylindanopyran	1222-05-5	++
Hexyl cinnamal	101-86-0	++
Hyydroxyisohexyl 3-cyclohexene carboxaldehyde (HICC)	31906-04-4/51414-25-6	++++
Hydroxycitronellal	107-75-5	+++
Isoeugenol	97-54-1	+++
alpha-Isomethyl ionone	127-51-5	++
(DL)-Limonene	138-86-3	++ (n.-ox.) +++ (ox.)
Linalool	78-70-6	++ (n.-ox.) +++ (ox.)
Linalyl acetate	115-95-7	+ (n.-ox.) ++ (ox.)
Menthol	1490-04-6/89-78-1/2216-51-5	++
6-Methyl coumarin	92-48-8	++
Methyl 2-octynoate	111-12-6	++
Methyl salicylate	119-36-8	+
3-Methyl-5-(2,2,3-trimethyl-3-cyclopentenyl)pent-4-en-2-ol	67801-20-1	++ (r.t.)
alpha-Pinene and beta-Pinene	80-56-8 and 127-91-3, resp.	++
Propylidene phthalide	17369-59-4	+ (r.t.)
Salicylaldehyde	90-02-8	++
alpha-Santalol and beta-Santalol	115-71-9 and 77-42-9, resp.	++
Sclareol	515-03-7	+
Terpineol (isomere mix)	8000-41-7	+
alpha-Terpineol	10482-56-1/98-55-5	+
Terpinolene	586-62-9	+
Tetramethyl acetyloctahydronaphthalenes	54464-57-2/54464-59-4/68155-66-8/68155-67-9	+
Trimethyl- benezenepropanol (Majantol)	103694-68-4	++
Vanillin	121-33-5	++

Table 1. Known contact allergens in humans: single substances. Substances with an “alarming” prevalence of sensitization (100 – 1,000 reported cases: +++; > 1,000 reported cases: ++++) are presented in bold. ox. = oxidized; ­n.-ox. = nonoxidized; r.t. = rarely tested.

Table 1. Known contact allergens in humans: single substances. Substances with an “alarming” prevalence of sensitization (100 – 1,000 reported cases: +++; > 1,000 reported cases: ++++) are presented in bold. ox. = oxidized; n.-ox. = nonoxidized; r.t. = rarely tested.