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Hi Michelle,The most common is Hydroxypropyl Methacrylate (also called HPMA, although that is not an INCI name that can be used on a product label). HPMA is the #2 allergen in the UK - most probably because of HEMA-free monomer. If someone develops a HEMA allergy from their original monomer and then changes to HEMA-free, they often get a HPMA allergy too because HEMA encourages this. But there are other alternatives - so without seeing the product label, I can't accurately say.
Hi Michelle,
The most common is Hydroxypropyl Methacrylate (also called HPMA, although that is not an INCI name that can be used on a product label). HPMA is the #2 allergen in the UK - most probably because of HEMA-free monomer. If someone develops a HEMA allergy from their original monomer and then changes to HEMA-free, they often get a HPMA allergy too because HEMA encourages this. But there are other alternatives - so without seeing the product label, I can't accurately say.
