Polish version

Didecyldimethylammonium saccharinate

Didecyldimethylammonium saccharinate an ionic liquid of sweet taste, with fungicidal and bactericidal properties. May be used as an active agent in cosmetic preparations, such as:

· toothpastes,

· antiseptic mouth rinses.

It has no toxic effect on warm-blooded organisms (toxicity class IV).

Structural formula:


R = C10H21

chemical formula: C29H52N2O3S

molar mass: 508.8 g/mol

Didecyldimethylammonium saccharinate is a thick, non-volatile liquid, crystallizing at room temperature, of color from light-yellow to willow-green-lemon, specific, pleasant smell and sweet taste.

Well soluble in chloroform, chloromethane and ethanol but poorly soluble in warm and cold water. Total decomposition temperature is 291 °C.

A brief description of the technology

The compound is obtained in a reaction between didecyldimethylammonium chloride and sodium saccharinate, conducted in aqueous environment. The product is separated by extraction with methylene chloride. Resulting ionic liquid, solved in an organic solvent, is concentrated by distillation under reduced pressure.

The product needs additional drying at increased temperature and under reduced pressure, in order to remove water.

Advantages of the technology offered

The reaction proceeds with big efficiency.

The technology is simple, energy-saving and low-waste.

The reaction proceeds in water and methylene chloride used can be turned back to the next synthesis. The only by-product is sodium chloride.

The technology has been implemented on the scale about 5 kg per batch.


The apparatus set to synthesize ionic liquids consists of a glass reactor with bottom drain valve, fitted with a high-performance, high speed mechanical stirrer,

a thermometer and a dephlegmator, which can be exchanged for a distillation set with a heating / cooling jacket, enabling to heat up or cool down the contents of the reactor.

Auxiliary equipment consists of:

  • thermostat,
  • membrane vacuum pump,
  • vacuum evaporator (necessary for final drying of the product).

A factory standard worked out for the product includes description of analytic methods.

Market competitiveness

Product in some cases interchangeable with commonly used didecyldimethylammonium chloride. It has similar or even better fungicidal and bactericidal properties and better, more acceptable taste.


Anna Wiśniewska, M.Sc., Chem. Eng.

phone: + 48 22 568 21 93