Used for washing drip irrigation systems and as a phosphate fertilizer.
Physical and chemical indicators:
1. Appearance – colorless transparent liquid
2. Orthophosphoric acid (H3PO4),% not less than 73.0
3. Density, g / cm3, not less than 1.69
4. Residue after calcination,% no more than 0.2
5. Volatile acids (CH3COOH),%, not more than 0,001
6. Nitrates (NO3),% not more than 0.0005
7. Sulfates (SO4),%, not more than 0.003
8. Chlorides (Cl),%, not more than 0,001
9. Ammonium salts (NH4),%, not more than 0.002
10. Iron (Fe),%, not more than 0,001
11. Arsenic (As),% not more than 0.00005
12. Heavy metals (Pb),% not more than 0.0005
13. Substances that reduce KMnO4 (H3PO3),% not more than 0,012
Hazard class: 3 (medium moderately hazardous substance).