"Organic" and "Chemical" are words that already have a clear meaning. In the alternative context in which these words are used, they have no meaning. You won't find a consistent or concise definition that describes the alternative context in which these words have come to be used. What those words really mean in that context, is completely arbitrary, varies greatly depending on who you're talking to, and has noting to do with the use of chemicals, or organic chemicals. Worse yet, products that are deemed to be either "Organic" or "Chemical Free" often fail to meaningfully differentiate themselves from the products which are "not organic" or "chemical".

At best, the use of these words is a deceitful marketing ploy used to manipulate people who don't understand chemistry. At worst (as is the case with "organic certification"), it is simply a scam used to con money out of producers and consumers.