The biochemical Weed Pharm from Pharm Solutions Inc. is the only “food grade” non-selective weed and grass killer. Weed Pharm has an active ingredient of 200 grain vinegar (20 percent acetic acid), which qualifies for use in organic production under Rule 205.605 of the USDA National Organic Program. Bulk sales are available in 55 gallon drum, 275 gallon totes and truckload quantities.