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ISO 20843:2003 Petroleum and related products -- Determination of pH of fire-resistant fluids within categories HFAE, HFAS and HFC
standard by International Organization for Standardization, 09/01/2003
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ISO 20843:2003 specifies a test method to determine the pH value of non-flammable fluids within categories HFAE, HFAS and HFC, as classified in ISO 6743-4:1999.