Dinatrium-5,7-dinitro-8-oxidonaphthalen-2-sulfonat og uopløselige barium-, strontium- og zirconiumlakker, -salte og -pigmenter heraf
Disodium 5,7-dinitro-8-oxidonaphthalene-2-sulphonate and its insoluble barium, strontium and zirconium lakes, salts and pigments