{"query":"Group D","results":{"Group D":{"iec":"IIA","substance":"Propane/Methane","notes":"NEC Group D = IIA. Most common gas group."}},"_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."}}