ACS reagent
powder
37.5-38.6% H2SO4 in NaOH (titration)
≤0.002% H2SO4≤0.01% insolubles≤2.5% water
37.5‑38.6%
2.512 g/mL at 25 °C (lit.)
chloride (Cl-): ≤0.002%phosphate (PO43-): ≤0.001%
Ca: ≤0.002%Fe: ≤0.002%Mg: ≤0.001%Na: ≤0.01%heavy metals: ≤0.001%
[K+].[K+].[K+].OS([O-])(=O)=O.[O-]S(=O)(=O)OS([O-])(=O)=O
1S/3K.H2O7S2.H2O4S/c;;;1-8(2,3)7-9(4,5)6;1-5(2,3)4/h;;;(H,1,2,3)(H,4,5,6);(H2,1,2,3,4)/q3*+1;;/p-3
ZXJZSJHWYNTTSK-UHFFFAOYSA-K
Danger
Acute Tox. 3 Inhalation - Eye Dam. 1 - Skin Corr. 1A - STOT SE 3
Respiratory system
6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
WGK 3