I'm not a lawyer, I am a consumer and small business the same as many others here. I live in California and we have many requirements. I can share that a law went into effect in January of 2022 called SB312, aka CFFIRKA, aka California Fragrance and Flavor Information Right To Know Act. Along with Prop 65 and a grip of other state reporting requirements, simply put, this means there are reporting requirements in using fragrance or flavor (whether natural or not) in products made or SOLD to consumers in California.
HOWEVER, the requirements are specific percentages of specific ingredients for rinse off and leave on products (the last time I looked, there were 4500+ ingredients on their excel spreadsheet). If you make, sell, distribute (etc) your products to consumers in CALIFORNIA, you will need to abide by their consumer safety protocol. For me, this meant I had to get a database created with the specific ingredients that are potentially reportable, have it created to calculate the specific percentages I use and measure the output to see if that particular fragrance or flavor being used falls within the reportable guidelines.
Next, I had to create an account in their reporting portal to only discover that one MUST have barcodes for those products (even though they may not be in stores) because the California reporting portal is set up to accept "barcodes" in addition to company and product information. So off to purchase barcodes. I learned the hard way, I would only ever buy bar codes from GS1 because they are the original source and barcodes are not recycled. That little bill ran me $6,500.00, oh and you get to pay an annual fee to use what you already bought thereafter!
Then I had to contact all my fragrance and flavor suppliers and ask for "EU Allergen" sheets because THAT data is within the reportable categories. Of course they hadn't heard of CFFIRKA and thought I was out of bounds wanting "proprietary information". I had to explain countless times and refer them to the State of California website to understand what I needed and WHY! I'm not looking to formulate fragrance or flavor, I'm looking to remain your customer and comply! I found out very swiftly who would help and who wouldn't. Hence, I have now narrowed down FIERCELY who I will and will not do business with when purchasing fragrance / flavors. I'm happy to report, you will now see more and more fragrance suppliers including EU Allergens as well as IFRA and SDS sheets on their websites (this is partially why!)
Here in the US, we now also have MoCRA (Modernization of Cosmetics Regulation Act) which is an entire book in itself. Now the answer to your question..........................................is something "safe", I think like everything else it's what theory you subscribe to.