1,3-Dihydroxynaphthalene

for spectrophotometric det. of Cu, ≥99.0%

for spectrophotometric det. of Cd, Co, Cu, Mn, Ni, Tl, ≥99.0%

for spectrophotometric det. of Co(II), Cu(II), ≥90%

for spectrophotometric det. of Au, NO₂^-, Ce(IV), for the detection of Au, Co, Cu, SCN^-, V, ≥97.0%

for spectrophotometric det. of Cu, ≥99.0%

for spectrophotometric det. of Zn(II), Cu(II), Fe(II), Co(II), H₂O₂, ≥95.0% (HPLC)

for spectrophotometric det. of Cu, Zn

for spectrophotometric det. of Cu, ≥99.0%

for spectrophotometric det. of Au(II), Co(II), Cu(II), Ni(II), Pd(II), Re(VII), U(VI), ≥97.0% (sum of isomers, HPLC)