BONA(2B and 4B azo-oners)
​β-Oxynaphthoic acid (BONA) is the coupling component. The same chemistry is involved as for β-Naphthols. A heat resistance of up 240 °C make this class acceptable for plastics, but the light fastness and alkaline resistance are often relatively low.
- P.R.48:1
- P.R.48:2
- P.R.48:3
- P.R.53:1
- P.R.57:1
- P.Br.5