• Protassium+ 3IX 0-0-53 fertilizer 50 lb.
  • Pile of white SOP 3IX 0-0-53 fertilizer powder on a white background
  • Protassium+ 3IX 0-0-53 fertilizer 50 lb. bag back
  • Protassium 3 IX fertilizer grade 0-0-53 potassium sulfate logo
  • Protassium 3 IX fertilizer grade 0-0-53 potassium sulfate powder
  • Description
  • Product Features
  • Specifications

Protassium+ SOP 3IX 0-0-53 Crystalline Potassium Sulfate — 50 lb

Protassium+ SOP 3IX is the highest-purity crystalline sulfate of potash available commercially, produced via ion exchange to deliver 53% soluble potash (K₂O) and 18% sulfate sulfur. With the lowest chloride content and lowest salt index of any SOP on the market, 3IX is the preferred potassium sulfate for high-value crop production, sensitive hydroponic systems, and precision liquid blend formulation.

The ultra-fine crystalline form (very low SGN) ensures rapid, complete dissolution with no residue — making 3IX the ideal potassium source for fertigation injection systems, recirculating hydroponic programs, and custom liquid fertilizer blending.

Key Features

  • 53% soluble potash (K₂O) — highest K₂O content of any SOP formulation
  • 18% sulfate sulfur — immediately plant-available sulfur co-delivered with potassium
  • Ion exchange production — ultra-low chloride; lowest salt index of any SOP
  • Crystalline form — very low SGN for rapid, complete dissolution in water
  • Chloride-sensitive crop safe — ideal for berries, specialty crop, tobacco, potatoes, and vegetables
  • Liquid blend compatible — dissolves cleanly with no residue in fertigation and hydroponic systems

Applications

  • Hydroponic and soilless nutrient programs
  • Fertigation and drip irrigation systems
  • High-value chloride-sensitive crop production
  • Precision liquid fertilizer blend formulation
  • specialty crop production — bloom and finishing stages

Specifications

  • Analysis: 0-0-53 + 18% S
  • Soluble Potash (K₂O): 53% minimum
  • Sulfur (S): 18% sulfate
  • Form: Crystalline (very low SGN)
  • Production method: Ion exchange
  • Size: 50 lb
  • Brand: Protassium+ (Compass Minerals)
  • Country of Origin: Canada
  • SKU: SOP-3IX-50lb
  • High Analysis: Guaranteed Analysis 0-0-53 with 18% Sulfur
  • Water Soluble: 100% soluble in water up to 378 grams per gallon (100 grams per liter)
  • Pure: Highest Purity Crystalline Potassium Sulfate Fertilizer for Fertigation and Hydroponics.
 Protassium+ 3 IX Chemical Analysis
 Analysis Constituent
Formula Unit TypicalSpecification
 Potassium SulfateK2SO4 % 99.47 99.30 min
 Potassium Oxide (equivalent)
K2O %  53.90 53.00 min
 Potassium
K %  44.74 44.50 min
 Total Sulfate
SO4 % 54.97 54.50 min
 Sulfur
S % 18.35 18.00 min
 Chlorine
Cl % 0.04 0.05 max
 SodiumNa % 0.08  
 Moisture
H2O % 0.05 0.15 max
 Insoluble fraction, in water
-- % 0.05 0.10 max
 pH, 5.0% solution in water at 25 °C
-- -- 7.40 6.00 - 9.00
 Magnesium
Mg % 0.01 
 Calcium
Ca % 0.02 
 IronFe %0.01  

Protassium+ SOP 3IX 0-0-53 Potassium Sulfate 50 lb

Protassium+ SOP 3IX 0-0-53 Potassium Sulfate 50 lb

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$1.22 lb
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