o-Tolidine dihydrochloride hydrate
O-Tolidine dihydrochloride hydrate (CAS: 304671-77-0) is an amine salt with the formula [-C6H3(CH3)-4-NH2]2 · 2HCl · xH2O and a molecular weight of 285.21 g/mol (anhydrous basis). This organic compound serves as a valuable building block in chemical synthesis and nitrogen compound research. Its specific applications are diverse, contributing to various research and development processes in organic chemistry.
- IUPAC
- 3,3′-Dimethylbenzidine dihydrochloride
![o-Tolidine dihydrochloride hydrate ([-C6H3(CH3)-4-NH2]2 · 2HCl · xH2O) — chemical structure, CAS 304671-77-0; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F304671-77-0.png&w=3840&q=75)
Chemical Synthesis Intermediate
O-Tolidine dihydrochloride hydrate is utilized as a key intermediate in the synthesis of more complex organic molecules. Its reactive amine groups and aromatic structure make it a versatile component in multi-step reaction pathways.
Research and Development
This compound finds application in research laboratories for exploring new synthetic routes and developing novel chemical entities. It is a useful reagent for academic and industrial R&D projects.
Organic Building Block
As an organic building block, o-Tolidine dihydrochloride hydrate contributes to the construction of various chemical structures. Its presence in a synthesis scheme can introduce specific functional groups and structural motifs.
| Molecular weight | 285.21 (anhydrous basis) |
|---|---|
| Linear formula | [-C6H3(CH3)-4-NH2]2 · 2HCl · xH2O |
| Assay | 97% |
| Melting point | >340 °C(lit.) |



Hazard statements
- H302Harmful if swallowed
- H350May cause cancer
- H411Toxic to aquatic life with long-lasting effects
Precautionary statements
- P201Obtain special instructions before use
- P273Avoid release to the environment
- P308IF exposed or concerned
| Transport (UN / ADR) | UN 3077 9 / PGIII |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T,N |
| Risk statements (R) | 45-22-51/53 |
| Safety statements (S) | 53-45-61 |
| Ignition residue | ≤0.1% |
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 O-Tolidine dihydrochloride hydrate used for?
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O-Tolidine dihydrochloride hydrate is primarily used as a building block in chemical synthesis and in research and development for creating novel organic compounds.
What are the CAS number and formula for O-Tolidine dihydrochloride hydrate?
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The CAS number for O-Tolidine dihydrochloride hydrate is 304671-77-0, and its linear formula is [-C6H3(CH3)-4-NH2]2 · 2HCl · xH2O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies O-Tolidine dihydrochloride hydrate with an assay of 97%. We do not represent this product as USP, BP, EP, or other pharmacopoeial grades.
What are the safety and handling considerations for O-Tolidine dihydrochloride hydrate?
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This compound is harmful if swallowed, suspected of causing cancer, and is toxic to aquatic life with long-lasting effects (H302, H350, H411). Handle with appropriate personal protective equipment in a well-ventilated area. It is classified as a Group 3 hazard for water pollution (WGK Germany).
Is O-Tolidine dihydrochloride hydrate available for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including O-Tolidine dihydrochloride hydrate.
How can I request a sample or quote for O-Tolidine dihydrochloride hydrate?
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Please contact our sales team directly through our website or by phone to request a sample or a quotation for O-Tolidine dihydrochloride hydrate.
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