Petroleumsulfonater, bortset fra petroleumsulfonater af alkalimetaller, af ammonium eller af ethanolaminer; tiofenholdige sulfonsyrer af olier hidrørende fra bituminøse mineraler og salte deraf
Petroleum sulphonates, excluding petroleum sulphonates of alkali metals, of ammonium or of ethanolamines; thiophenated sulphonic acids of oils obtained from bituminous minerals, and their salts