Interesting. NMA... N-Methylaniline
https://en.wikipedia.org/wiki/N-Methylaniline
A quick Google does lead to some comments against it. It is banned in Russia and China.
https://vuvanalytics.com/wp-content/uploads/2019/01/Final_PEFTEC-2019-Presentation-NTGAs_2.pdf
Not great.
https://www.tropicd.com.au/tropic-fuels-nma-free/
From Wikipedia:
"N-Methylaniline is a principal component of NMA (monomethylaniline), a non-traditional antiknock agent increasingly used by petroleum refiners and fuel distributors around the world to increase the octane number of gasoline petrol. It is usually added to gasoline in concentration of around 1.3% volume to avoid high gum levels that can cause increased carbon deposits in engine parts[citation needed]. Higher concentrations are permitted by most regulatory agencies if a detergent and a fuel combustion modifier are added to the component to keep gum formation from happening. NMA blended in those concentrations to gasoline / petrol is not more toxic than the hundreds of chemicals that compose this fuel. "
Not necessarily bad I guess... depending on how much is added and what else is in there,?
I dunno, not my area of expertise, I just know how to use Google a bit...
Can confirm you're right, it's listed in the safety sheet
https://www.npd.co.nz/wp-content/uploads/2020/11/NPD-100-PLUS-SDS-2020.pdf