Assay (calc. a.d.s.).................................................................98,0-101,5%

Identity according to Pharmacopoeias................................................ p/t.

Melting range............................................................................ 165-168°C

Specific rotation [a]20/D c=10 (in B4O7Na2.10H2O 13%)......+23,0 to+25,0°

Specific rotation [a]25/D c=1 (in (NH4)6Mo7O24.4H2O 4%)......+137 to +145°

MAX. IMPURITIES

Appearance of solution........................................................................ p/t.

Insoluble matter in H2O................................................................... 0,01 %

Conductivity at 20°C (c=20% w/v in H2O)................................20 μS.cm-1

Loss on drying at 105°C................................................................... 0,2 %

Residue on ignition (as SO4)............................................................. 0,1 %

Residual solvents (Ph.Eur./USP)............................................................ p/t

Darkened substances by H2SO4........................................................... p/t.

Acidity.................................................................................. 0,0008 meq/g

Alkalinity................................................................................ 0,006 meq/g

D(-)-Sorbite (G.C.)............................................................................. 2,0 %

Reducing sugars (as C6H12O6)......................................................... 0,05 %

Water (H2O)....................................................................................... 0,5 %

Related substances.............................................................................. p/t.

Chloride (Cl).................................................................................. 0,005 %

Sulphate (SO4)................................................................................ 0,01 %

Heavy metals (as Pb).................................................................. 0,0005 %

As............................................................................................... 0,0001 %

Ni................................................................................................ 0,0001 %

Pb............................................................................................. 0,00005 %