4,5-Dichloro-o-phenylenediamine
4,5-Dichloro-o-phenylenediamine (CAS: 5348-42-5) is an organic compound with the linear formula Cl2C6H2(NH2)2 and a molecular weight of 177.03 g/mol. This dichloro-substituted aromatic diamine serves as a valuable building block in organic synthesis. It is primarily utilised in the chemical industry for the production of various organic compounds, including pharmaceuticals and speciality chemicals. Available from Tech Serve Solutions at a minimum assay of 97%.
- IUPAC
- 1,2-Diamino-4,5-dichlorobenzene,4,5-Dichloro-1,2-phenylenediamine
- Synonyms
- 1,2-Diamino-4,5-dichlorobenzene4,5-Dichloro-1,2-phenylenediamine

Organic Synthesis Intermediate
4,5-Dichloro-o-phenylenediamine is employed as a key intermediate in the synthesis of more complex organic molecules. Its reactive amine groups and halogen substituents allow for diverse chemical transformations.
Pharmaceutical Precursor
This compound can serve as a precursor in the development of active pharmaceutical ingredients (APIs). Its structure is amenable to modification for creating compounds with potential therapeutic properties.
Speciality Chemical Production
It is used in the manufacturing of speciality chemicals, contributing to the synthesis of dyes, polymers, and other fine chemical products. The specific arrangement of functional groups enables tailored chemical outcomes.
| Molecular weight | 177.03 |
|---|---|
| Linear formula | Cl2C6H2(NH2)2 |
| Assay | 97% |
| Melting point | 158-164 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H315Causes skin irritation
- H319Causes serious eye irritation
- H332Harmful if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 20/21/22-36/37/38 |
| 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 4,5-Dichloro-o-phenylenediamine used for?
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4,5-Dichloro-o-phenylenediamine is primarily used as a building block in organic synthesis, including the preparation of pharmaceutical intermediates and speciality chemicals.
What are the CAS number and formula for 4,5-Dichloro-o-phenylenediamine?
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The CAS number is 5348-42-5 and the linear formula is Cl2C6H2(NH2)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4,5-Dichloro-o-phenylenediamine with a minimum assay of 97%. We do not represent this product as USP, BP, or EP grade.
How should 4,5-Dichloro-o-phenylenediamine be handled safely?
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Handle with appropriate personal protective equipment, including a dust mask (type N95 US recommended), eyeshields, and gloves. Avoid dust formation and ensure adequate ventilation. Refer to the Safety Data Sheet for comprehensive information.
Is 4,5-Dichloro-o-phenylenediamine a controlled substance?
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The provided data does not indicate that 4,5-Dichloro-o-phenylenediamine is a controlled substance.
How is this chemical packed and shipped by TSS?
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Tech Serve Solutions, as a global supplier and exporter, ensures appropriate packing for chemical products. Please contact us for specific details regarding shipping and export.
How can I request a quote or sample?
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To request a quote or sample of 4,5-Dichloro-o-phenylenediamine, please contact our sales team through the website or by phone.
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