[70720-25G] N-(1-Naphthyl)ethylenediamine dihydrochloride monomethanolate for spectrophotometric det. of nitrate and nitrite, ≥99.0% 359,500원
[70720-100G] N-(1-Naphthyl)ethylenediamine dihydrochloride monomethanolate for spectrophotometric det. of nitrate and nitrite, ≥99.0% 1,162,480원