Dialkylester Ammonium Methosulfate

Basic Info:

  • Chemical Synonym(s): Fatty acids, C10-20 and C16-18-unsatd., reaction products with triethanolamine, di-Me sulfate-quaternized;
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  • CAS Number: 91995-81-2
  • Chemical Formula:


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Dialkylester Ammonium Methosulfate, also known as DAM, is a chemical compound used as an organic intermediate.

It is produced by reacting dimethylamine with methanol or ethanol to form an amine salt which is then reacted with methanesulfonic acid to produce the product.

It is also produced by the reaction of methylamine with ethylene oxide. Under some conditions, it is produced when the chemical reaction between two common elements occur in water, ammonia and sulfuric acid.

Dialkylester Ammonium Methosulfate is a general name for a set of dialkyl ammonium salts. This colourless liquid dissolves in polar solvents. It is produced industrially by the reaction of dimethyl sulfate and methanol. 


Dialkylester Ammonium Methosulfate is used mainly as a catalyst. It is used as a catalyst for the production of alkylated polyamines and polysulfides.

It is used as a polymerization catalyst for olefinic monomers such as styrene. It is used as a catalyst for the production of vinyl chloride.

And it is also used as a catalyst for the production of propylene oxide. It is also used to make agents for curing epoxy and vinyl resins. It is used in cosmetics (hair dye), deodorants, and food products (especially dips).

It is used for wastewater treatment and has chemical properties like it can dissolve oils, grease, dirt, and other pollutants in water that are not easy to clean. It also acts as an accelerator for the condensation reaction involving the formation of cyclohexene oxide. It may use this for other reactions, such as those that form dibenzyl ketone and dimethyl sulfide.

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