Potassium Hydroxide / KOH / Caustic Potash

Parameter

Grade

Standard

HG/T3688 – 2000

UN Code

1813 CLASS 8 PKG II

Item

Inspection item %

Premium Grade

First Grade

01

KOH

≥ 95

≥ 90

02

K2CO3

≤ 0.5

≤ 0.5

03

Chloride (Cl)

≤ 0.005

≤ 0.005

04

Fe

≤ 0.0005

≤ 0.0005

05

Sulfate (SO4)

≤ 0.005

≤ 0.005

06

Nitrate (N)

≤ 0.0005

≤ 0.0005

07

Na

≤ 0.5

≤ 0.25

08

Phosphate (PO4)

≤ 0.005

≤ 0.005

09

Silicate (SiO3)

≤ 0.01

≤ 0.01

10

Al

≤ 0.002

≤ 0.002

11

Ca

≤ 0.005

≤ 0.005

12

Ni

≤ 0.0005

≤ 0.0005

13

Heavy metal (as Pb)

≤ 0.002

≤ 0.002