Lignosulfuric acid
Synonyms
Ligninsulfonic acid;
Category
Anionic Surfactant
> Sulfonate
>> Chain Sulfonate
>>> Natural Substances Sulfonate
>>>> Natural Substances (Plant Origin) Sulfonate
Chemical Numbering System
CASRN：8062-15-5
EINECS：N/A
Molecular Formula & Molecular Weight
Molecular Formula: N/A
Molecular Weight: N/A
Structure
Main structural groups:
Properties
Appearance (1), yellow-brown to brown powder.
Solubility slightly soluble in water.
Stability stable.
Risk Solid form: flammable material; irritation, moderate irritation to skin, eye, respiratory. Harmful products of combustion are CO, CO2 and so on. Contact with strong oxidants, can cause to burn.
GHS (Rev.10) label: 
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent dispersing, emulsifying, wetting, permeating, chelating abilities. Good chelating effect to heavy metals, particularly iron, copper, and stannous ion.
Synthesis
Lignosulfonate is usually prepared from papermaking wastewater.
For further information, see:
United States Patent 9,447,131 Lignosulfonate of a certain quality and method of preparation of lignosulfonate of a certain quality,
Li Xuesong. Treatment of papermaking wastewater by a precipitation method. Journal of Beijing University of Chemical Technology, Vol.35, No.5, 2008, and so on.
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
40.0 - 80.0 |
|
Reducing substances, %, ≤ |
15.0 |
Test Methods
(1), Actives
(2), Reducing substances
HG/T 3507 Sodium lignie sulphonate dispersing agent
2, Hazardous substances indexes
|
Item |
Hazardous substances indexes |
|
Solid |
|
|
Heavy metals (as Pb), mg/Kg, ≤ |
20 |
|
As, mg/Kg, ≤ |
3 |
Test Methods
(1), Heavy metals (as Pb)
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30799 The test method of food detergents - Determination of heavy metals
(2), As
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30797 The test method of food detergents - Determination of total arsenic
3, Further explanation
(a), On physical and chemical indexes: firstly, shall be indicated carbon atom distribution; secondly, shall be indicated average molecular weight.
Major Uses
1, Typical Applications
Use as water-reducing agent.
Use as dispersing agent.
Use as adhesive.
2, Dyes
Dispersing agent, filler in dyes.
Manufacturers