Nitric Acid & Phosphoric Acid

Nitric Acid
Phosphoric Acid Min 85%

Nitric Acid

HNO3 68.0% Min
HNO2 100 ppm Max
CI 4 ppm Max
Fe 4 ppm Max
Ig-Residue 100 ppm Max
Pb 0.1 ppm Max
Arsenic 3 ppm Max
(20 ℃, Sp.Gr)
1.405 Min

Phosphoric Acid Min 85%

Appearance Clear solution colorless, odorless By Visual
Identification Conform to Standard -
Purity 85 % min Alkanide – acid titration
Chlorides (CI) 0005% max Turbidity with AgNO3
Sulphate (SO4-2) 0.002% max Turbidity with BaCl2
Content of Iron (Fe) 0.0005% max Complex spectrophotometric method
Heavy Metal (as Pb) 0.0001% max Color comparison with hydrogen sulfide
Arsenic 0.0001% max Color comparison with AgDTCC in pyridine
Fluoride (F) 0.001% max Fluoride with the ion-selective Electrode
Nitrates 0.0005% max Color comparison with indigo carmine
Volatile acids (as Acetic acid) 0.001% max Distillate and titrate with NaOH 0,1N
Content of P2O5 61% min ISO 3706:1976 (Quinoline phosphomolybdate gravimetric method)
Content of H3PO3 0.012% max Determine phosphate and then Oxydize phosphite to phosphate by KMnO4 / H2SO4 and determine total phosphate again