potassium hydrate

Synonyms: Caustic potash; potassium hydrate
CAS No.: 1310-58-3
Molecular Weight: 56.11
Chemical Formula: KOH

Physical and Chemical Properties

Appearance:
White deliquescent solid
Odor:
Odorless.
Solubility:
52.8% in water @ 20C (68F)
Specific Gravity:
2.04
pH:
13.5 (0.1 molar solution)
% Volatiles by volume @ 21C (70F):
0
Boiling Point:
1320C (2408F)
Melting Point: 360C (680F)

Specification

item  
solid  solid    
liquid liquid  
flakes flakes
First quality Qualifier First quality Qualifier Best quality Qualifier
  
KOH % ≥  
90.0 88.0  
48.0 45.0  
95.0 94.0
K2CO3 % ≤ 2.5 3.0 1.2 1.5 1.4 2.0
  
Chloride(Cl)Assay% ≤  1.4 1.0  0.5 0.7  0.5 0.7
  
Iron(Fe) ≤  0.05 0.07             -         -  0.03 0.05
  
Sulphate(SO42-)Assay≤            -          -             -         -  0.1       -
  
KCLO3- ≤          -        -            -         -  0.1       -
  
Nitrate and nitrite(N) % ≤          -        -            -         -  0.03        -
  
Na % ≤  2.0 2.0  1.5 1.5  2.0 2.0