English
grade
ACS reagent
Quality Level
Agency
suitable for EPA 1621
suitable for ISO 25101
suitable for SM 2310
suitable for SM 2320
suitable for SM 4500 - NH3
Assay
≥99.5%
form
crystalline powder
crystals
pellets
impurities
≤0.002% N compounds
≤0.005% insolubles
pH
6.0-8.4 (25 °C, 5%)
solubility
water: soluble(lit.)
anion traces
S2-: passes test
SO42- and SO32-: ≤0.1%
cation traces
N: ≤0.002%
