| Termini | Standard |
| HCOONa%: | 90-98 % min |
| Na2C03%: | 0.1-1 % max |
| NaCl%: | 0.0005 % max |
| NaOH | 0.1-0.5% max |
| Na2S | 0.005% max |
| % Fe: | 0.0005 % max |
| % acqua: | 0.5-1.5 % max |