Table 11-4: Overview of threshold results from clinical studies.

Chloroatranol
Ref.
ROAT
In ethanol 92 % positive 0.025 μg/cm2 observed (238)
In ethanol 100% positive 0.125 μg/cm2 observed (238)
 PATCH TEST
ED10% 0.0004 μg/cm2 estimated (238)
ED50% 0.0045 μg/cm2 estimated (238)
Cinnamal
ROAT
In ethanol no effect 0.02% observed (101)
In ethanol 44 % positive 0.1% observed (101)
In ethanol 72 % positive 0.8% observed (101)
Deodorant matrix 11% positive 0.26 μg/cm2(0.01%) observed (103)
Deodorant matrix 41% positive 0.84 μg/cm2(0.032%) observed (103)
Deodorant matrix 82% positive 2.63 μg/cm2(0.1%) observed (103)
 PATCH TEST
ED50% 96 μg/cm2 estimated (101)
No effect level 0.4 μg/cm2(0.01%) observed (101)
No effect level NG (0.002%) observed (103)
HICC
ROAT
In a cream base ED10% 4.9 μg/cm2 interpolated (105)
In a perfume (ethanol) ED10% 1.2 μg/cm2 interpolated (105)
In ethanol 61% positive 15.3 μg/cm2(3.4-22.2) observed (224)
In ethanol 89% positive 126.2 μg/cm2(40.5-226.2) observed  (224)
In ethanol/water no response 0.0357 μg/cm2 observed (263)
In ethanol/water ED10% 0.064 μg/cm2 estimated (263)
In deodorant matrix between 64% to 100% positive 0.79 μg/cm2(median) observed (102)
PATCH TEST
ED10% (95% CI) 0.662 μg/cm2(0.052-2.35) estimated (263)
ED10% 0.75 μg/cm2 estimated (102)
ED10% 0.9 μg/cm229 (7-69) ppm estimated (224)
ED50% (95% CI) 11.1 μg/cm2(3.41- 33.1) estimated (263)
ED50% (95% CI) 18.3 μg/cm2(3.41- 33.1) estimated (102)
ED50% (95% CI) 20 μg/cm2662 (350-1250) ppm estimated (224)
No effect level <0.0022 μg/cm2 observed (263)
 Hydroxycitronellal
ROAT
Deodorant matrix 57 % positive 0.94 μg/cm2(0.032%) observed (104)
Deodorant matrix 71 % positive 2.94 μg/cm2(0.1%) observed (104)
Deodorant matrix 100 % positive 9.40 μg/cm2(0.32%) observed (104)
PATCH TEST
No effect level <0.00012 % (=0.036 μg/cm2)* (*calculated) observed  (104)
Isoeugenol
ROAT
in ethanol 63% positive 5.6 μg/cm2 observed (100)
in ethanol 42% positive 2.2 μg/cm2 observed (264)
in ethanol 67% positive 9.0 μg/cm2 observed (264)
Deodorant matrix 23 % positive 0.167 μg/cm2 observed (279)
Deodorant matrix 69 % positive 0.53 μg/cm2 observed (279)
Deodorant matrix 77 % positive 1.67 μg/cm2 observed (279)
PATCH TEST
ED50% (in petrolatum) 32 μg/cm2 estimated (100)
No effect (in ethanol) <0.0005% (0.15 μg/cm2 observed (264)
No effect (in petrolatum) <0.4 μg/cm2 observed (100)

Source: SCCS,  Opinion on Fragrance allergens in cosmetic products, pages 91-93