Oxalic acid dihydrate

TraceSELECT™, ≥99.9999% (metals basis)
Ethanedioic acid

TraceSELECT™ Ultra and TraceSELECT

  • ultra-pure acids, bases, and salts for smelting and wet digestion in environmental, water, and food analysis
  • sample preparation for trace analysis requires reagents of the highest purity; our TraceSELECT Ultra products for ultra-trace analysis at ppb and even ppt levels are produced by sub-boiling distillation
  • the acids, bases, and salts in the TraceSELECT series have been developed for sample preparation and analysis in the ppb (μg/kg) trace range
  • packaged in high-quality containers appropriate for each product
  • the reagents are produced and bottled under clean-room conditions



Beilstein Registry Number CAS Numbers (All) Linear Formula
MDL Number
Molar Mass
126,07 g/mol
RTECS Number
Ethanedioic acid



    Ruthenium (Ru)max. 0.005 ppm
    Hafnium (Hf)max. 0.005 ppm
    Praseodymium (Pr)max. 0.005 ppm
    Arsenic (As)max. 0.01 ppm
    Tantalum (Ta)max. 0.01 ppm
    Thorium (Th)max. 0.005 ppm
    Tungsten (W)max. 0.005 ppm
    Chromium (Cr)max. 0.01 ppm
    Tin (Sn)max. 0.005 ppm
    Potassium (K)max. 0.2 ppm
    Iridium (Ir)max. 0.005 ppm
    Assay (manganometric)min. 99.5 %
    Samarium (Sm)max. 0.005 ppm
    Neodymium (nd)max. 0.005 ppm
    Total Nmax. 10 ppm
    Barium (Ba)max. 0.01 ppm
    Titanium (Ti)max. 0.02 ppm
    Beryllium (Be)max. 0.001 ppm
    Rhodium (Rh)max. 0.005 ppm
    Erbium (Er)max. 0.005 ppm
    Gadolinium (Gd)max. 0.005 ppm
    Sodium (Na)max. 0.1 ppm
    Zinc (Zn)max. 0.02 ppm
    Lanthanum (La)max. 0.005 ppm
    Indium (In)max. 0.001 ppm
    Tellurium (Te)max. 0.005 ppm
    Mercury (Hg)max. 5 ppb
    Iron (Fe)max. 0.05 ppm
    Bismuth (Bi)max. 0.001 ppm
    Calcium (Ca)max. 0.1 ppm
    Yttrium (Y)max. 0.005 ppm
    Lithium (Li)max. 0.005 ppm
    Ytterbium (Yb)max. 0.005 ppm
    Chloride (Cl)max. 5000 ppb
    Selenium (Se)max. 0.01 ppm
    Zirconium (Zr)max. 0.1 ppm
    Lutetium (Lu)max. 0.005 ppm
    Silver (Ag)max. 0.01 ppm
    Cobalt (Co)max. 0.005 ppm
    Terbium (Tb)max. 0.005 ppm
    Germanium (Ge)max. 0.005 ppm
    Aluminium (Al)max. 0.02 ppm
    Nickel (Ni)max. 0.01 ppm
    Phosphate (PO<SUB>4</SUB>)max. 500 ppb
    Rubidium (Rb)max. 0.01 ppm
    Sulfate (SO<SUB>4</SUB>)max. 2000 ppb
    Strontium (Sr)max. 0.01 ppm
    Copper (Cu)max. 0.005 ppm
    Uran (U)max. 0.001 ppm
    Holmium (Ho)max. 0.005 ppm
    Gallium (Ga)max. 0.001 ppm
    Gold (Au)max. 0.001 ppm
    Magnesium (Mg)max. 0.02 ppm
    Europium (Eu)max. 0.005 ppm
    Cadmium (Cd)max. 0.05 ppm
    Lead (Pb)max. 0.01 ppm
    Manganese (Mn)max. 0.005 ppm
    Molybdenum (Mo)max. 0.005 ppm
    Vanadium (V)max. 0.01 ppm
    Dysprosium (Dy)max. 0.005 ppm
    Thulium (Tm)max. 0.005 ppm
    Scandium (Sc)max. 0.05 ppm
    Cerium (Ce)max. 0.005 ppm
    Thallium (Tl)max. 0.001 ppm
    Platinum (Pt)max. 0.05 ppm
    Cesium (Cs)max. 0.01 ppm
    Niobium (nb)max. 0.005 ppm
    Rhenium (Re)max. 0.005 ppm
    Palladium (Pd)max. 0.01 ppm
    Antimony (Sb)max. 0.005 ppm


    No Records

    Safety Information

    Hazard ClassN/A
    Package GroupN/A
    UN IDN/A
    Add more compare product