4.013328

Sodium hydrogen carbonate

for HPLC

NaHCO3              M.=84.01

CAS No.             144-55-8

Guarantee analysis

Assay (acidimetric)             99.7 ~ 100.3%

pH value(1% in H2O, 20℃）      8.0 ~ 8.6

Insoluble matter                ≤ 0.01%

Nitrogen compounds (as N)       ≤ 0.0005%

Phosphate (PO4)                 ≤ 0.001%

Chloride (Cl)                   ≤ 0.01%

Sulphate (SO4)                  ≤ 0.003%

UV absorption(10% in H2O)

λ 240 nm             max 0.1

λ 250 nm             max 0.04

λ 260 nm             max 0.02

λ 280 nm             max 0.01

λ 500 nm             max 0.01

Suitability for RP gradient test                  complying

Suitability for filter test                       complying