4-Hydroxy-1H-benzotriazole
4-Hydroxy-1H-benzotriazole (CAS 26725-51-9), with the molecular formula C6H5N3O and a molecular weight of 135.12 g/mol, is a heterocyclic organic compound. It serves as a valuable building block in chemical synthesis, particularly within the realm of heterocyclic chemistry. Its primary applications lie in organic research and development, facilitating the creation of more complex molecular structures for various scientific investigations.

Chemical Synthesis
4-Hydroxy-1H-benzotriazole acts as a key intermediate and building block in the synthesis of diverse organic molecules. It is frequently employed in the construction of heterocyclic frameworks for research purposes.
Organic Research & Development
This compound is utilised in laboratory settings for the exploration of new chemical entities and reaction pathways. Its structure lends itself to modification for creating novel compounds with potential applications in various scientific fields.
Reagent in Organic Reactions
It can be incorporated into synthetic routes to introduce specific functional groups or structural motifs. Researchers use it to facilitate complex chemical transformations in academic and industrial R&D.
| Molecular weight | 135.12 |
|---|---|
| Empirical formula | C6H5N3O |
| Assay | 97% |
| Melting point | 224 °C (dec.) |

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-Hydroxy-1H-benzotriazole primarily used for?
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4-Hydroxy-1H-benzotriazole (CAS 26725-51-9) is primarily used as a building block and intermediate in organic synthesis and research and development.
What is the CAS number and molecular formula for 4-Hydroxy-1H-benzotriazole?
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The CAS number is 26725-51-9 and the molecular formula is C6H5N3O.
What grade and purity does Tech Serve Solutions supply for 4-Hydroxy-1H-benzotriazole?
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Tech Serve Solutions supplies 4-Hydroxy-1H-benzotriazole with an assay of 97%. We do not represent this product as USP, BP, EP, or any pharmacopoeia grade.
How should 4-Hydroxy-1H-benzotriazole be handled?
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4-Hydroxy-1H-benzotriazole is classified with Warning (GHS07) and associated hazard statements H302, H312, H315, H319, H332, H335. Appropriate personal protective equipment includes a dust mask type N95 (US), eyeshields, and gloves. Ensure good ventilation and avoid dust formation.
How is 4-Hydroxy-1H-benzotriazole packed, shipped, and exported?
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Tech Serve Solutions specialises in the global supply and export of fine chemicals, including 4-Hydroxy-1H-benzotriazole. We adhere to stringent packaging and shipping regulations to ensure safe and compliant delivery worldwide.
How can I request a quote or sample of 4-Hydroxy-1H-benzotriazole?
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To request a quote or sample of 4-Hydroxy-1H-benzotriazole, please contact our sales team via the website or direct email, providing your specific requirements.
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