N,N,N’,N’-Tetramethyl-p-phenylenediamine dihydrochloride CAS:637-01-4

N,N,N’,N’-Tetramethyl-p-phenylenediamine dihydrochloride, commonly referred to as TMPD, is a chemical compound that is widely used in various applications, including analytical chemistry, biochemistry, and materials science. TMPD is a solid crystalline powder that is soluble in water and commonly appears as a white to off-white color.

One of the primary uses of TMPD is as an electron donor in redox reactions. Due to its ability to donate electrons, it is commonly employed as a co-reductant in redox enzyme assays and as an electrochemical mediator in dye-sensitized solar cells. It aids in the conversion of chemical energy to electrical energy.

TMPD is also used as a substrate in the determination of oxidative enzymes such as peroxidases and laccases. It undergoes oxidation in the presence of these enzymes, resulting in the development of a colored product. This color change can be quantitatively measured spectrophotometrically to determine the activity and concentration of the respective enzyme.

Moreover, TMPD has applications in materials science, particularly in the field of conductive polymers and organic electronics. It has been utilized as a dopant in the synthesis of conductive polymers, enhancing their electrical conductivity. It can also act as a charge transport material in organic electronic devices like organic field-effect transistors (OFETs) and organic photovoltaics (OPVs).

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Application and Effect

Oxygen Scavenging: TMPD is commonly used as an oxygen scavenger in the food and beverage industry. It can react with oxygen, preventing oxidation and extending the shelf life of packaged products. TMPD helps preserve the color, flavor, and quality of various food and beverage products.

Antioxidant: TMPD possesses antioxidant properties, which make it useful in the formulation of cosmetics and personal care products. It helps protect against oxidative damage caused by environmental factors and reduces the signs of aging on the skin.

Color Development: TMPD is utilized in certain analytical methods, such as spectrophotometric assays. It can undergo redox reactions, resulting in the development of a color change that can be measured to determine the concentration or activity of specific substances, including enzymes or substrates.

Electrochemical Applications: TMPD is commonly employed as an electron donor in electrochemical systems, including dye-sensitized solar cells and electrochemical sensors. It facilitates the flow of electrons, aiding in the conversion of chemical energy to electrical energy.

Polymerization: TMPD is utilized as a polymerization initiator in the production of conductive polymers and certain resins. It can promote the formation of cross-linked structures, enhancing the electrical conductivity and mechanical properties of the resulting materials.

Redox Indicator: TMPD can serve as a redox indicator in various chemical reactions, helping scientists monitor the progress and endpoint of oxidation-reduction reactions.

Anti-Hair Loss Treatment: TMPD is included in some hair care products targeting hair loss. It is believed to help stimulate hair growth and prevent hair loss by improving the blood circulation in the scalp.

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Additional Information:

Composition	C10H17ClN2
Assay	99%
Appearance	White powder
CAS No.	637-01-4
Packing	Small and bulk
Shelf Life	2 years
Storage	Store in cool and dry area
Certification	ISO.