which grades of waxes are not harm full for the human beings ?
paraffin wax , fully refined paraffin wax , oil content below 0.75% is not harmfull for man and can be used in cosmetic , creams , sandwitch papers ...
white , snow white , ultra snow white petroleum jelly can be used for human being for skin care and other cosmetinc purpuses , ultra snow white can be used in pharma purposes too
white oil also has cosmetic and pharma grade which are suitable for the same purposes
residue wax or foots oil and different grades of slack wax can not be used for human being at all