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Humic acid

Overview Drilling fluid How it is originated Uses Preparation
Humic acid
Humic acid
Chemical Name:
Humic acid
NHA;pgs10;humic;enersol;agro-lig;ulmicacids;humicacids;HUMIC ACID;HUMIFULVATE;humification
Molecular Formula:
Formula Weight:
MOL File:
Mol file

Humic acid Properties

Water Solubility 
Slightly soluble in water, with much swellingSoluble in organic solvents like acetone and benzenol. Slightly soluble in water.
Stable. Incompatible with strong oxidizing agents.
EPA Substance Registry System
Humic acids(1415-93-6)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36
WGK Germany  3
RTECS  MT6544000
Signal word: Warning
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Humic acid price More Price(4)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 53680 Humic acid technical 1415-93-6 10g $43.3 2018-11-13 Buy
Sigma-Aldrich 53680 Humic acid technical 1415-93-6 50g $138 2018-11-13 Buy
Alfa Aesar 041747 Humic acid 1415-93-6 5g $33.3 2018-11-16 Buy
Alfa Aesar 041747 Humic acid 1415-93-6 25g $123 2018-11-16 Buy

Humic acid Chemical Properties,Uses,Production


Humic acid is also known as humus acid. A complex mixture of natural organic polymer compounds. Black or black brown amorphous powder, slightly soluble in water and acid, soluble in hot concentrated nitric acid with dark red. Soluble humic acid can be formed by reacting with alkali solution. It can be also used as dispersion and emulsification agents. It has weak acidity, hydrophilicity, complexation, redox, ion-exchange and physiological activity because it contains elements such as carbon, hydrogen, oxygen, nitrogen, and active groups such as hydroxyl, carbonyl, carboxyl, quinone, methoxy and aromatic nuclei. According to the process of its formation, it is divided into primary humic acid and regenerative humic acid. According to the solubility and color difference, it is divided into humic acid or humus acid (soluble in alkali solution), brown humic acid or melilotic acid (soluble in acetone, ethanol), fulvic acid (soluble in water). It exists in soil humics and lean coal, which is formed by partial decomposition of plant residues in the presence of air and water. Thus, it can be extracted from peat, lignite, or some soil and used as soil modifier, plant growth stimulant, insecticide, fertilizer, herbicide, medicine, mud stabilizer for oil drilling, ion exchanger and also battery plate, etc. Its sodium or ammonium salt can be used to prepared the humic acid coalball as a binder.

Drilling fluid

Humic acid is the effective component of the coal alkali solution for the fluid loss additive of slurry. It is not a single compound, but a mixture of a variety of compounds with different molecular sizes and inconsistencies in the structure. These compounds contain nitrogen, hydrogen, oxygen, carbon and other elements. From the analysis of functional groups and structural, it is proved that they are the multifunctional chain polymers containing aromatic rings and alkene bonds. These functional groups contain carboxyl, alcohol hydroxyl, phenolic hydroxyl, methoxy, quinoxy, nitrogen-containing group and so on. Carboxyl, phenolic hydroxyl and methoxy play the leading role in mud treatment agents. Molecular weight from 1900~4900, such as:

How it is originated

It is mainly formed by the ancient plants, which accumulated in marshland after death. Through the complex biochemical and physicochemical changes, the decarboxylation and dehydration reaction had occurred in the plant wreckage, releasing gaseous products such as carbon dioxide, water, and methane. Finally, a new brown gelatinous substance - peat was produced. The peat contains a large amount of humic acid, bitumen and a large amount of water.


  1. Used as a filtrate reducer with resistance to high temperature for fresh water drilling fluid with the effect of reducing viscosity. But the salt resistance is poor.
  2. Used as fertilizer and soil acid regulating agent
  3. The raw material for the production of humic acid compound fertilizer, the raw material for the production of drilling additive and pesticides.
  4. Biochemical research
  5. Plant growth stimulating hormone. Humic acid macromolecule is connected with carboxyl, hydroxyl, carbonyl, benzoquinonyl, methoxy and other functional groups. Exchange with metal ions, adsorption, complexation, chelation and so on. In a dispersive system, as the polyelectrolytes, it has the effects on condensation, peptisation and dispersion, etc.


The reaction of lignite and caustic soda [lignite: caustic soda = 100: (10~20) (mass ratio)]. The product can be obtained after the reaction liquid is filtered, concentrated and dried.

Chemical Properties

black granules


Drilling fluids, printing inks, plant growth.


A brown, polymeric constituent of soils, lignite, and peat; it contains the brownishblack pigment melanin. It is soluble in bases, but insoluble in mineral acids and alcohols. It is not a well-defined compound but a mixture of polymers containing aromatic

Humic acid Preparation Products And Raw materials

Raw materials

Preparation Products

Humic acid Suppliers

Global( 121)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 22059 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20795 55
City Chemical LLC
203.937.8400 United States 101 58
TCI 021-67121386 / 800-988-0390 China 5400 58
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30308 84
TCI (Shanghai) Development Co., Ltd. 021-67121386 / 800-988-0390
021-67121385 China 24654 81
Energy Chemical 021-58432009 / 400-005-6266
021-58436166-800 China 44192 61
JinYan Chemicals(ShangHai) Co.,Ltd. 13817811078,021-50426030
86-021-50426522,50426273 China 10088 60
Adamas Reagent, Ltd. 400-600-9262 China 14017 59
Chemfun Medical Technology(Shanghai) Co., Ltd. 021-67220633 & 021-37212706
+86-21-67220638 China 21898 59

Humic acid Spectrum

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