o-Tolylhydrazine hydrochloride
o-Tolylhydrazine hydrochloride (CAS: 635-26-7) is an organic compound with the linear formula CH3C6H4NHNH2·HCl and a molecular weight of 158.63 g/mol. This compound serves as a valuable building block in chemical synthesis, particularly within the realm of organic chemistry. It is primarily utilised in the preparation of various hydrazone derivatives, contributing to research and development in diverse chemical fields.
- IUPAC
- 2-Methylphenylhydrazine hydrochloride
- Synonyms
- 2-Methylphenylhydrazine hydrochloride

Organic Synthesis
o-Tolylhydrazine hydrochloride is employed as a key intermediate in organic synthesis. Its structure allows for versatile reactions, facilitating the construction of more complex molecular architectures.
Hydrazone Formation
This compound has been documented for its use in forming hydrazones, specifically in the preparation of the o-tolylhydrazone of D-galactose. This application highlights its utility in carbohydrate chemistry and related areas.
Research and Development
As a functionalised hydrazine derivative, o-Tolylhydrazine hydrochloride finds application in academic and industrial research settings for exploring new synthetic pathways and developing novel compounds.
| Molecular weight | 158.63 |
|---|---|
| Linear formula | CH3C6H4NHNH2 · HCl |
| Assay | 97% |
| Solubility | alcohol: solublechloroform: solublediethyl ether: solublepetroleum ether: slightly soluble (cold)water: very slightly soluble |
| Application | o-Tolylhydrazine hydrochloride has been used in the preparation of o-tolylhydrazone of D-galactose1. |
| Melting point | 190 °C (dec.)(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, Faceshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 20/21/22-36/37/38 |
| Safety statements (S) | 26-36/37/39 |
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-Tolylhydrazine hydrochloride used for?
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o-Tolylhydrazine hydrochloride is primarily used as a building block in chemical synthesis and for the preparation of specific hydrazone derivatives, such as the o-tolylhydrazone of D-galactose.
What is the CAS number and chemical formula for o-Tolylhydrazine hydrochloride?
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The CAS number for o-Tolylhydrazine hydrochloride is 635-26-7, and its linear formula is CH3C6H4NHNH2·HCl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies o-Tolylhydrazine hydrochloride with an assay of 97%. This product is not represented as USP, BP, or EP grade.
What are the safety considerations when handling o-Tolylhydrazine hydrochloride?
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o-Tolylhydrazine hydrochloride is classified with GHS07 symbol and a Warning signal word. It carries hazard statements H302, H312, H315, H319, H332, and H335, indicating it is harmful if swallowed, in contact with skin, or if inhaled, and causes skin and serious eye irritation, as well as respiratory irritation. Appropriate personal protective equipment, including a dust mask (N95), eyeshields, face shields, and gloves, should be used.
How is o-Tolylhydrazine hydrochloride typically exported?
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Tech Serve Solutions is a global supplier and exporter of fine chemicals, including o-Tolylhydrazine hydrochloride, adhering to international shipping regulations.
How can I request a quote or sample for o-Tolylhydrazine hydrochloride?
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To request a quote or sample for o-Tolylhydrazine hydrochloride, please contact the Tech Serve Solutions sales team through our official website or designated contact channels.
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