Item

Specification

Top Quallity

Qualified

Appearance

Reddish brown thick transparent liquid

The mass fraction of iron/%                      ≥

11.0

11.0

The mass fraction of a reducing substance(Fe²⁺)/%    ≤

0.10

0.10

Basicity/%

8.0-16.0

5.0-20.0

Mass fraction of insoluble matter/%               ≤

0.2

0.3

PH(1% Water Solution)

1.5-3.0

Density/g/cm3 (20℃)                           ≥

1.45

1.45