2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol
2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol (CAS: 3864-99-1) is a chemical compound with the molecular formula C20H24ClN3O and a molecular weight of 357.88 g/mol. This substance functions as a UV absorber, crucial for protecting materials from degradation caused by ultraviolet radiation. It finds primary application as a stabilizer in various polymer systems, enhancing their durability and lifespan.
- Synonyms
- C20H24ClN3O

UV Absorber
This compound effectively absorbs ultraviolet radiation, preventing photodegradation of polymers. It is widely used to protect materials from the damaging effects of sunlight and other UV sources.
Polymer Stabilizer
Incorporated into polymer formulations, it enhances the weatherability and longevity of plastics and other polymeric materials. It helps maintain physical properties and appearance upon exposure to UV light.
Materials Protection
Its UV absorbing properties make it valuable for protecting a range of materials beyond bulk polymers, including coatings, adhesives, and sealants, from UV-induced degradation.
| Molecular weight | 357.88 |
|---|---|
| Empirical formula | C20H24ClN3O |
| Assay | 98% |
| Application | UV absorber |
| Melting point | 150-153 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 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 2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol used for?
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This compound is primarily used as a UV absorber and a stabilizer for polymers and other materials, protecting them from photodegradation.
What are the CAS number and formula for this chemical?
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The CAS number is 3864-99-1, and its molecular formula is C20H24ClN3O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this chemical with an assay of 98%. We do not represent it as USP, BP, EP, or other pharmacopoeia grades unless explicitly stated.
How should this chemical be handled safely?
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This compound may cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Handle with appropriate personal protective equipment, including a dust mask (type N95 or equivalent), eyeshields, and gloves. Ensure adequate ventilation.
Is this chemical available for export?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals and laboratory reagents.
How can I request a sample or a quote?
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Please contact our sales team to request a sample or a quotation for 2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol.
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