2-(2'-Hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole

Also known as: 2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol, 2-(3,5-Di-tert-butyl-2-hydroxyphenyl)-5-chloro-2H-benzotriazole, 2-(3,5-Di-tert-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(5-Chloro-2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylethyl)phenol, 2-(5-Chloro-2H-benzotriazol-2-yl)-4,6-bis(2-methyl-2-propanyl)phenol, 5-Chloro-2-(3,5-di-tert-butyl-2-hydroxyphenyl)benzotriazole, Phenol, 2-(5-chloro-2H-1,2,3-benzotriazol-2-yl)-4,6-bis(1,1-dimethylethyl)-, Ultraviolet Absorbent UV-327, UV-327, UV absorber 327, BHSORB-327, Dibutylhydroxyphenylchlorobenzotriazole, EINECS 223-383-8, MFCD00059706, UNII-17TJE602RX

2-(2'-Hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole (CAS 3864-99-1) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C20H24ClN3O and a molecular weight of 357.877 g/mol. Key properties include a melting point of 150-153 °C(lit.), a boiling point of 469.2±55.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 237.6±31.5 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

3864-99-1

Jingsj CID

J-44209-1

Molecular Formula

C₂₀H₂₄ClN₃O

Molecular Weight

357.877 g/mol

Category

Aromatic Hydrocarbons

Last updated

8/21/2026