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Beautician
| • | p-phenylenediamine: black hair dye |
| • | thiuram: protective gloves |
| • | formaldehyde: shampoos and permanent waving solutions |
| • | glycerol thioglycolate (active ingredient in permanent wave solutions) (unlike PPD; may remain allergenic in the hair long after they have been rinsed out – therefore, allergic hairdressers may not be able to cut permed hair) |
| • | cocomidopropyl betaine – a surfactant in shampoos |
Bakers
| • | benzoyl peroxide: flour (used to bleach) |
| • | oil of limonene: orange, lemon peel, celery and dill |
| • | cinnamic aldehyde: flavoring agent |
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