N,N,N′,N′-Tetramethyl-p-phenylenediamine
N,N,N′,N′-Tetramethyl-p-phenylenediamine (CAS: 100-22-1) is an organic compound with the linear formula C<sub>6</sub>H<sub>4</sub>[N(CH<sub>3</sub>)<sub>2</sub>]<sub>2</sub> and a molecular weight of 164.25 g/mol. It is a diamine derivative of p-phenylenediamine, recognised for its use as a redox indicator and in chemical synthesis. Tech Serve Solutions supplies this chemical with an assay of 99%.
- IUPAC
- TMPD,TMPDA,TMPPD,Wurster’s reagent
- Synonyms
- N,N,N′,N′-Tetramethyl-p-phenylenediamineN,N′-Tetramethyl-p-phenylenediamine100-22-1C6H4[N(CH3)2]2TMPDTMPDATMPPDWurster’s reagent

Redox Indicator
N,N,N′,N′-Tetramethyl-p-phenylenediamine serves as a sensitive redox indicator. It is particularly known as Wurster's reagent, forming stable radical cations upon oxidation, which are intensely coloured.
Chemical Synthesis
This compound functions as a versatile building block in organic synthesis. Its structure allows for further functionalisation and incorporation into more complex molecular architectures.
Electron Donor
Due to its electron-rich nature, it can act as an effective electron donor in various chemical reactions and studies, including research into charge-transfer complexes.
| Molecular weight | 164.25 |
|---|---|
| Linear formula | C6H4[N(CH3)2]2 |
| Assay | 99% |
| Boiling point | 260 °C(lit.) |
| Melting point | 49-51 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H332Harmful if inhaled
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
| Flash point | 110 °C / 230 °F |
|---|---|
| Transport (UN / ADR) | UN 2811 6.1 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 20/21/22 |
| Safety statements (S) | 28 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is N,N,N′,N′-Tetramethyl-p-phenylenediamine used for?
+
N,N,N′,N′-Tetramethyl-p-phenylenediamine is primarily used as a redox indicator (Wurster's reagent) and as a building block in chemical synthesis due to its electron-donating properties.
What are the CAS number and chemical formula for N,N,N′,N′-Tetramethyl-p-phenylenediamine?
+
The CAS number for N,N,N′,N′-Tetramethyl-p-phenylenediamine is 100-22-1, and its linear formula is C<sub>6</sub>H<sub>4</sub>[N(CH<sub>3</sub>)<sub>2</sub>]<sub>2</sub>.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies N,N,N′,N′-Tetramethyl-p-phenylenediamine with an assay of 99%. We do not represent this product as USP, BP, EP, or other pharmacopoeia grades unless explicitly stated in the product specifications.
How should N,N,N′,N′-Tetramethyl-p-phenylenediamine be handled safely?
+
N,N,N′,N′-Tetramethyl-p-phenylenediamine is harmful if swallowed, in contact with skin, and if inhaled (H302-H312-H332). Appropriate personal protective equipment, including gloves and respiratory protection, should be worn during handling. Refer to the safety data sheet for comprehensive guidance.
How is N,N,N′,N′-Tetramethyl-p-phenylenediamine packed and shipped?
+
N,N,N′,N′-Tetramethyl-p-phenylenediamine is packed according to industry standards for chemical reagents and exported globally by Tech Serve Solutions.
How can I request a sample or quote for N,N,N′,N′-Tetramethyl-p-phenylenediamine?
+
To request a sample or a quote, please contact our sales department through the website or by calling our main line. Specify the product name and CAS number (100-22-1) in your request.
▶ Related products

3,4,5-Trimethoxybenzylamine
Organic Building Blocks

3,4-dihydroxyphenylacetone
Organic Building Blocks

3-Fluoro-4-methoxybenzonitrile
C8H6FNO
Organic Building Blocks
4-Ethyltoluene
C2H5C6H4CH3
Organic Building Blocks
Fluoroacetic acid
C2H3FO2
Organic Building Blocks
Methoxyacetaldehyde
C3H6O2
Organic Building Blocks
Methyl 4-acetamido-5-chloro-2-methoxybenzoate
Organic Building Blocks

Methyl 5-bromo-2-iodobenzoate
BrC6H3(I)CO2CH3
Organic Building Blocks▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis