| http://www.w3.org/ns/prov#value | - An amount of the pH regulating agent to be used depends upon the kind of the agent and is selected from such a range as regulating pH within the above range upon addition to the cleaning agent, and generally it is 0.0001 to 10% (w/v), preferably 0.001 to 1% (w/v), relative to the total amount of the cleaning agent.
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