4.013326

Sodium carbonate

anhydrous, for HPLC

Na2CO3              M.=105.99

CAS No.             497-19-8

Guarantee analysis

Assay (Acidim.) after drying at 285°C     ≥ 99.5%

Loss on drying at 285°C                   ≤ 1.0%

Reducing substances of I2                  ≤ 0.005%

Insoluble matter in H2O                    ≤ 0.005%

Chloride (Cl)                              ≤ 0.001%

Sulphur compounds (as SO4)                 ≤ 0.003%

Phosphate (PO4)                            ≤ 0.001%

Nitrogen compounds (as N)                  ≤ 0.001%

UV absorption (10% in H2O) 

λ 245 nm             max 0.10

λ 250 nm             max 0.05

λ 270 nm             max 0.03

λ 300 nm             max 0.02

λ 450 nm             max 0.01

Suitability for RP gradient te