Nadine
I posted this exact tread a few months ago - and Im not sure exact;y which member it wasnow (baby brain) but she is a hair dresser and she said its totally fine - all the sallon formulas they use now dont have the toxic chemicals in them that they used to have - they are all far more natural.
It is still your decision - I spoke to my h/dresser at leangth and we went through what the hair colour was made of and all that jazz and I reserched it - my h/dresser and I then went with a semi perminent as it has less potency than a permient.
I hope that helps.
Kate