{"name":"coal dust","dustGroup":"IIIB","dustGroupRank":2,"tClass":"T3","mit_cloud_c":225,"mit_layer_c":170,"mec_g_m3":55,"mie_mj":30,"category":"dust","notes":"Conductive carbonaceous dust. Zone 20/21/22 classification common in mining.","_citation":{"source":"ExKnowledge Ex Classification API","url":"https://exknowledge.com/api-docs.html","attribution":"Data from ExKnowledge (https://exknowledge.com). Based on IEC 60079, ATEX 2014/34/EU, and IECEx standards.","license":"Free to use with attribution. Link to https://exknowledge.com/api-docs.html when presenting this data."}}