Is Type 2 the same as Type 3 deionized water? No, Type 2 is more pure then Type 3 Water, refer to the chart above. Type 2 meets or exceeds Type 3 water specifications, but Type 3 does not meet Type 2 Water specifications. See ASTM specs for more information.
Does the Deionized water come with a COA? Producing deionized water is a continuous process, so we do not provide a COA, we can just provide a document that it meets a certain specification. If you require water for a nuclear power plant or a critical application we can provide a COA, but it there will be additional costs