4.012919di-Sodium hydrogen phosphatefor HPLCNa2HPO4 M.=141.96 CAS No. 7558-79-4Guarantee analysisAssay (acidimetric) ≥ 99.0 %pH value (5% in H2O, 20°C) 8.7 ~ 9.3Chloride (Cl) ≤ 0.001 %Sulfate (SO4) ≤ 0.005 %UV absorption(0.33M in H2O)λ 220 nm max 0.10λ 230 nm max 0.05λ 240 nm max 0.04λ 260 nm max 0.02λ 500 nm max 0.02suitability for RP gradient test complyingsuitability for filter test complying
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