TOXICITY – truly non-toxic – note LD50 results on SDS for each product and see articles on toxicity under Resources or click here for SDS CORROSION TO SKIN AND EYES – not corrosive – see SDS for each product for description CORROSION TO METALS – metal tests indicate non-corrosive and so low that can be released (under local approvals) directly into the water system after use. See corrosion tests under Resources GASKETS AND OTHER NORMALLY USED SEALING MATERIALS –  traditional acids can react with some rubbers and other material to cause swelling and otherwise negatively affect materials used in sealing. Alpha Descaler does not have negative effects on most materials.  See Effect on Sealing materials SPEED – works as fast or faster than comparative but dangerous mineral acid products. See Video comparing to 12% HCl product. CAPACITY – regular version equal to comparative but dangerous mineral acid products, extra strength version has double the capacity of regular mineral acids. See Capacity Tests against mineral acid products under Resources BIODEGRADABILITY – considered 100% biodegradable in under 10 days even at full strength. See Specifications. DISPOSAL – as per local authorities to obtain approvals but tests have proven material to be marine safe. See Specifications. FOOD CONTACT – Alpha Descaler FG and Alpha Descaler FG Extra Strength NSF60 approved and has even been in use where food contact is possible. See NSF60 listing details. SHIPPING – Alpha Descaler and Alpha Descaler FG, regular and extra strength all have 0-0-0- rating for shipment and considered as non-hazardous material. See Dissolve Rate and Corrosion Rate and Pictogram Comparison to Other Acids