N-Methyl-1,2-phenylenediamine
N-Methyl-1,2-phenylenediamine (CAS: 4760-34-3), with the linear formula CH3NHC6H4NH2 and a molecular weight of 122.17 g/mol, is an organic compound. It is primarily utilised as a chemical intermediate in organic synthesis. This compound serves as a valuable building block in the preparation of complex heterocyclic structures, particularly benzimidazoles, by reacting with ketene dithioacetals.
- Synonyms
- CH3NHC6H4NH2N-Methylbenzene-1,2-diamine

Benzimidazole Synthesis
N-Methyl-1,2-phenylenediamine is employed in the preparation of benzimidazoles. It reacts with ketene dithioacetals to form these important heterocyclic compounds, finding use in further chemical synthesis.
Organic Synthesis Intermediate
As a diamine derivative, this compound functions as a versatile building block in various organic synthesis pathways. Its structure allows for diverse chemical modifications and incorporation into larger molecules.
Nitrogen Compound Precursor
This molecule serves as a precursor for creating other nitrogen-containing organic compounds. Its reactive amine groups facilitate its use in building more complex structures for research and development.
| Molecular weight | 122.17 |
|---|---|
| Linear formula | CH3NHC6H4NH2 |
| Assay | 97% |
| Boiling point | 123-124 °C/10 mmHg(lit.) |
| Density | 1.075 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.612(lit.) |
| Application | Employed in the preparation of benzimidazoles from ketene dithioacetals.1 |
| Melting point | 22 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H315Causes skin irritation
- H319Causes serious eye irritation
- H332Harmful if inhaled
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 113 °C / 235.4 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 20/21/22-36/38 |
| Safety statements (S) | 26-36 |
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-Methyl-1,2-phenylenediamine used for?
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N-Methyl-1,2-phenylenediamine is primarily used as an intermediate in organic synthesis, notably for the preparation of benzimidazoles from ketene dithioacetals.
What is the CAS number and formula for N-Methyl-1,2-phenylenediamine?
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The CAS number is 4760-34-3 and the linear formula is CH3NHC6H4NH2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies N-Methyl-1,2-phenylenediamine with an assay of 97%. This is a technical/research grade, and TSS does not represent it as USP, BP, or EP.
What are the safety and handling considerations for this compound?
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This compound is classified as harmful if swallowed, in contact with skin, or if inhaled, and causes skin and serious eye irritation (H302, H312, H332, H315, H319). Appropriate personal protective equipment, including eyeshields, gloves, and suitable respiratory protection, should be used. Always consult the Safety Data Sheet (SDS) before handling.
How is N-Methyl-1,2-phenylenediamine packed and shipped?
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N-Methyl-1,2-phenylenediamine is packed according to industry standards for chemical transport and can be exported globally by Tech Serve Solutions.
How can I request a sample or quote for N-Methyl-1,2-phenylenediamine?
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To request a sample or quote, please contact the Tech Serve Solutions sales team via our website or your designated account manager.
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