Ammonium sulfate

InChI key

BFNBIHQBYMNNAN-UHFFFAOYSA-N

InChI

1S/2H3N.H2O4S/c;;1-5(2,3)4/h2*1H3;(H2,1,2,3,4)

grade

ACS reagent, puriss. p.a.

agency

USP/NF, reag. ISO, reag. Ph. Eur.

assay

≥99%

form

crystalline

impurities

≤0.005% in water insoluble matters, ≤5 ppm heavy metals (by ICP-OES)

ign. residue

≤0.005% (as SO₄)

loss

≤0.1% loss on drying, 110 °C

pH

5-6 (25 °C, 5%)

mp

>280 °C (dec.) (lit.)

density

1.77 g/mL at 25 °C (lit.)

anion traces

chloride (Cl^-): ≤3 mg/kg, nitrate (NO₃^-): ≤10 mg/kg, phosphate (PO₄^3-): ≤5 mg/kg

cation traces

As: ≤0.00002%, Ca: ≤0.001%, Cd: ≤0.0001%, Co: ≤0.0005%, Cr: ≤0.0005%, Cu: ≤0.0002%, Fe: ≤2 mg/kg, K: ≤0.005%, Mg: ≤0.0002%, Mn: ≤0.0005%, Na: ≤0.002%, Ni: ≤0.0005%, Pb: ≤0.0002%, Zn: ≤0.0001%

Quality Level

100