Ammonium p-toluenesulfonate
Time: 2013-10-31 15:44:27
Ammonium p-toluenesulfonate
Synonyms
Ammonium 4-toluenesulphonate;
Benzenesulfonic acid, 4-methyl-, ammonium salt (1:1);
Benzenesulfonic acid, p-methyl-, ammonium salt;
Ammonium p-toluenesulphonate;
Ammonium toluene-4-sulphonate;
Category
Anionic Surfactant
>> Sulfonate
>> Aryl Sulfonate
>> Phenyl Sulfonate
>> Linear Alkylphenyl Sulfonate
Chemical Numbering System
CASRN4124-42-9
EINECS223-927-4
Molecular Formula & Molecular Weight
Molecular Formula: C7H11NO3S; C7H8O3S.H3N
Molecular Weight: 189.23
Structure
Properties
Appearance    (1), solid; (2), liquid.
Solubility    soluble in water.
Stability    unstable in alkali, release ammonia.
Risk    Solid form: flammable material; irritation, moderate irritation to skin, eye. Harmful products of combustion are CO, CO2 and so on. Contact with strong oxidants, can cause to burn.
GHS (Rev.6) label:  
Ecology    may be hazardous to environment. Water body should be given special attention.
Biodegradability    biodegradable.
Characteristics    excellent hydrotropic, viscosity reducing, pour point depressing, anti-caking, dispersing, emulsifying abilities.
Synthesis
Currently, sulfonation reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfonates.
Generally, p-toluene and sulfur trioxide react through reactor, then ammonia water 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
Item
Physical and chemical indexes
Solid
Actives, %, ≥
90.0
pH (25°C, 1%)
3.0 - 7.0
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
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 hydrotrope.
Use as auxilialy emulsifying agent, auxilialy dispersing agent.
Manufacturers
 
Update: 20170507(1);