Carbon black, method for producing carbon black, and rubber composition containing same

Provided are: a novel carbon black which, when added to a rubber material, maintains a certain degree or more of reinforcement properties and has superior insulating properties than conventional carbon black; and a rubber composition in which the carbon black is mixed. A carbon black having a nitrogen adsorption specific surface area (N2SA) of 20 (m2/g) or more and less than 50 (m2/g), a DBP absorption amount of 120 ml/100 g or more and less than 150 ml/100 g, a surface free energy polar component [gamma] ab Della of 20 mJ/m2 or more and 40 mJ/m2 or less, and a strongly acidic group concentration of 0.2 [mu] mol/m2 or more and 0.6 [mu] mol/m2 or less. 本公开提供一种在添加到橡胶件中时在维持一定程度以上的增强性的同时绝缘性比以往优异的新炭黑，以及混合有该炭黑的橡胶组合物。一种炭黑，其中，氮吸附比表面积(N2SA)为20(m2/g)以上且小于50(m2/g)，DBP吸收量为120ml/100g以上且小于150ml/100g，表面自由能极性分量γab Della为20mJ/m2以上且40mJ/m2以下，强酸性基团浓度为0.2μmol/m2以上且0.6μmol/m2以下。