Technical / FCO Master

Humic Acid 51% (Granular)

Read the Humic Acid, Fulvic Acid, K2O, TOC, pH and bulk-density specifications for Humic Acid 51% Granular.

FCO Composition

IngredientRequirement
Humic Acid (Source: American Leonardite)Minimum 51.00% by weight
Fulvic AcidMinimum 10.00% by weight
Potassium as K2OMinimum 16.00% by weight
Tetrapotassium PyrophosphateMinimum 4.50% by weight
Lignosulphonic AcidMinimum 14.22% by weight
Alkoxylated Fatty Acid Ester on Vegetable BaseMinimum 0.36% by weight
WaterMaximum 3.92% by weight
Total100%

Finished-Product Specifications

ParameterRequirement
Humic AcidMinimum 51%
Fulvic AcidMinimum 10%
Bulk Density0.5–0.7 g/cc
pH (1% aqueous solution)10–12
Total Organic CarbonMinimum 25.45%

How to Read the 51% / 10% / 16% Numbers

The technical should be read as a complete formulation, not only as '51% Humic Acid'. Humic Acid, Fulvic Acid, potassium as K2O and the other formulation components are separate specified elements. A commercial brand number such as '98' in Power Plus 98 must not be confused with the Humic Acid percentage.

Source / Process

American Leonardite is the source wording specified for the Humic Acid component in this technical. The source wording should be reproduced accurately without implying that the raw Leonardite/Humic source itself is manufactured in India.

How to Check a Product Using This Technical

  • Match the exact technical: Humic Acid 51% (Granular).
  • Check Humic Acid, Fulvic Acid and K2O values rather than one marketing number.
  • Check TOC, pH and bulk density against the applicable specification.
  • Check batch identity, legal company identity and authorised source.
  • Use batch-specific COA/test data when available.

Frequently Asked Questions

Does Humic Acid 51% Granular mean 51% is the only important value?

No. Fulvic Acid, K2O, TOC, pH, bulk density and the rest of the formulation also matter.

What is the minimum Fulvic Acid?

Minimum 10%.

What is the minimum Total Organic Carbon?

Minimum 25.45%.

What is the bulk-density specification?

0.5–0.7 g/cc.

Is this the same as Humic Acid 19.6% Liquid?

No. They are separate liquid and granular technical formulations.

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Reference & review

Last reviewed: 2026-10-05

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