2-Acrylamide 2-methylpropane sulfonic acid CAS 15214-89-8  is a multifunctional water-soluble anionic surfactant monomer with the molecular formula C7H13NO4S. It is a white crystalline powder with a sour odor. 0.1% aqueous solution has hygroscopicity and water solubility, with a solubility of 150 g/100 g in water at 25 ℃. Soluble in DMF, slightly soluble in methanol, ethanol, insoluble in solvents such as acetone and toluene. It is a strong acid, and the pH of the aqueous solution is related to its concentration. Dry monomers are stable at room temperature, but aqueous solutions are prone to polymerization, while sodium salt solution is more stable. This product has polymerizable vinyl and hydrophilic sulfonic acid groups within its molecules, and can copolymerize with water-soluble monomers such as acrylonitrile and acrylamide, as well as non water-soluble monomers such as styrene and vinyl chloride. Introduce hydrophilic sulfonic acid groups into polymers, making fibers, films, and other materials hygroscopic, permeable, and conductive. It can be used in the papermaking industry and wastewater treatment. Used as a coating modifier, fiber modifier, and medical polymer.

Chinese name: 2-acrylamide 2-methylpropane sulfonic acid

Foreign name: 2-Acrylamido-2-methylpropane sulfonic acid; AMPS

Nickname: t-Butylacrylamide sulfonic acid; Acrylamide t-butyl sulfonic acid [1]

Chemical formula: C7H13NO4S

Molecular weight: 207.24 [1]

Melting point: 185 ℃ (decomposition)

Water solubility: 150 g/100 g

Appearance: White crystalline powder with a sour odor

Physical and chemical properties

This product is a white crystalline powder with a melting point of 185 ℃, slightly sour taste, and strong hygroscopicity. If affected by moisture, AMPS monomers will polymerize themselves. Its aqueous solution is acidic, soluble in dimethylamide, partially soluble in methanol and ethanol, and difficult to dissolve in acetone. Chemical properties

PH value: 0.1% (weight ratio) aqueous solution has a pH value of 2.6, and its sodium salt solution is neutral.

Stability: Stable at room temperature. In aqueous solution, the rate of monomer hydrolysis is very slow, but polymerization inhibitors must be added to prevent its self polymerization; The aqueous solution of sodium salt has excellent resistance to hydrolysis under conditions with a pH value greater than 9; Homopolymers have good thermal stability.

Polymerization: AMPS monomers can be homopolymerized or copolymerized. The average heat of polymerization of AMPS in water is 22 kcal/mole, and both water and dimethylformamide can serve as polymerization media.

AMPS (2-acrylamide 2-methylpropane sulfonic acid) is a highly promising organic intermediate with various excellent properties, widely used in fields such as textiles, petroleum exploration, water treatment, plastics, papermaking, and coatings.

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