Isopropylamine branched dodecylbenzene sulfonate
Time: 2013-10-26 17:05:32
Isopropylamine branched dodecylbenzene sulfonate
Benzenesulfonic acid, branched dodecyl-, isopropylamine salts;
Anionic Surfactant
>> Sulfonate
>> Aryl Sulfonate
>> Phenyl Sulfonate
>> Branched Alkylphenyl Sulfonate
Chemical Numbering System
Molecular Formula & Molecular Weight
Molecular Formula: C21H39NO3S; C18H30O3S.C3H9N1
Molecular Weight: 385.60
R: C12-branched.
Appearance    (1), amber or yellow liquid.
Solubility    soluble in water. soluble in kerosene, xylene, acetone, methanol, mineral oil.
Stability    stable.
Risk    Liquid form: irritation, moderate irritation to skin, eye.
GHS (Rev.6) label:
Ecology    may be hazardous to environment. Water body should be given special attention.
Biodegradability    hardly biodegradable.
Characteristics    excellent cleansing, foaming, emulsifying, wetting, dispersing, solubilizing abilities. When mix with other surfactants, use as special emulsifier.
Note    (1), Hardly biodegradable. Avoid to use if possible.
(2), Do not use in nitrosating environment. Reaction of isopropylamine and nitrous acid can not produce nitrosamines, however, reaction of contained secondary amine of isopropylamine and nitrous acid can produce nitrosamines. Nitrosamine is a carcinogen.
Currently, sulfonation reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfonates.
Generally, branched dodecylbenzene and sulfur trioxide react through reactor, then isopropylamine neutralizes, finally obtain product.
US patent 8,921,588 (Process for preparing sulfates and/or sulfonates in a micro-reaction system) presents a synthetic process. Conditions: mole ratio of sulfur trioxide and alkyl benzenes or other raw materials: 1:1; temperature: 30-60°C; reactor: falling film reactor.
Quality Standards & Test Methods
1. Physical and chemical indexes
Physical and chemical indexes
Actives, %, ≥
25.0 - 90.0
pH (25°C, 1%); or
pH (25°C, 5%, 50% isopropanol solution)
3.0 - 10.0
Test Methods
(1), Actives
GB/T 5173 Surface active agents and detergents-Determination of anionic-active matter by direct two-phase titration procedure
ISO 2271 Surface active agents -- Detergents -- Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure
(2), pH
GB/T 6368 Surface active agents - Determination of pH of aqueous solution - Potentiometric method
ISO 4316 Surface active agents -- Determination of pH of aqueous solutions -- Potentiometric method
2. Hazardous substances indexes
Hazardous substances indexes
Heavy metals (as Pb), mg/Kg, ≤
As, mg/Kg, ≤
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 cleansing agent.
Use as emulsifying agent, dispersing agent.
2. Emulsion polymerization
Emulsifier, particle size controlling agent in emulsion polymerization.
Can be used in inverse emulsion polymerization.
3. Organic synthesis
Acidic catalyst in thermal activation reaction.
Update: 20170524(1);