IFRA's standards. For example, benzyl benzoate in category 4 is allowed at up to 4.8% of the total product due to some concerns but in category 11 (in my case, candles), it is without restriction. Hypothetically, I could make a candle with 8% fragrance which would consists of only benzyl benzoate and the candle would be compliant? Why? If there are concerns over dermal exposure to the fragrance material, how can there not be a concern of vaporising that fragrance material and then inhaling it, potentially over the course of a few hours? Is there simply no concern when it comes to inhaling benzyl benzoate in a room?