HEDP low arsenic

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HEDP low arsenic
Posting date : Jan 19, 2010
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29-
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Chemical Name: 1-Hydroxyethylidene-1, 1-diphosphonic Acid Abbreviation: HEDP (Arsenic 1.0max) CAS Number: 2809-21-4 Molecular Formula: C2H8O7P2 Molecular Weight: 206 Specification: Appearance Clear colourless to pale tan liquid, free from foreign matter. Odour Slight to none Active Acid (%) 59.5 - 61.0 pH (1% solution at 20°C) w/v 2.0 max pH (1% solution at 20°C) v/v 2.5 max Sequestrant value (mgCaCO3/g ) 400 min Iron, as Fe (ppm) 30.0 max Phosphorous acid as H3PO3 phosphoric acid as H3PO4 (%) 4.0 max Orthophosphate as PO43- (%) 0.5 max Viscosity at 25°C (mm2/s) 35.0 - 41.0 Specific Gravity at 20/20°C 1.440 - 1.455 Chloride (as Cl-, %) 1.0 max Colour (APHA) 30 max Arsenic content (As ppm) 1.0 max

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