Lignosulfuric acid
Time: 2017-07-26 22:31:39

Lignosulfuric acid

Synonyms

Ligninsulfonic acid;

Category

Anionic Surfactant

> Sulfonate

>> Chain Sulfonate

>>> Natural Substances Sulfonate

>>>> Natural Substances (Plant Origin) Sulfonate

Chemical Numbering System

CASRN8062-15-5

EINECSN/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.7) 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