Apariencia                                                    Cristales incoloros o polvo blanco cistalino          
 
Contenido  ( %  )                                          99.5 – 100.5 %
 
Humedad  ( % )                                            0.05 % max
 
Ácido Oxálico                                              100 mg/Kg max
 
Sulfatos ( ppm SO4 )                                   150 ppm max
 
Residuos de Ignición ( % )                          0.05 % max
 
Metales Pesados ( ppm )                            10 ppm max
 
Arsenico ( ppm )                                          1 ppm max
 
Plomo ( ppm )                                              0.5 ppm max
 
Mercurio ( ppm )                                          1 ppm max
 
Bacterias Endotoxinas                                0.5 IU/MG max
 
Calcio ( ppm )                                              200 ppm max
 
Fierro ( ppm )                                               50 ppm max