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2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol

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Name

2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol

EINECS 247-384-8
CAS No. 25973-55-1 Density 1.08 g/cm3
PSA 50.94000 LogP 5.50130
Solubility N/A Melting Point 80-83 °C
Formula C22H29N3O Boiling Point 469.1 °C at 760 mmHg
Molecular Weight 351.492 Flash Point 237.5 °C
Transport Information N/A Appearance Slightly yellowish powder
Safety 26-36 Risk Codes 36/37/38
Molecular Structure Molecular Structure of 25973-55-1 (2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol) Hazard Symbols IrritantXi
Synonyms

Phenol,2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentyl- (7CI,8CI);2-(2-Hydroxy-3,5-di-tert-amylphenyl)-2H-benzotriazole;2-(2H-Benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)phenol;2-(2'-Hydroxy-3',5'-di-tert-amylphenyl)benzotriazole;2-(3,5-Di-tert-amyl-2-hydroxyphenyl)benzotriazole;Chisorb 328;Cyasorb UV 2337;Kemisorb 74;Seesorb704;Tin 328;

Article Data 35

2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol Synthetic route

aqueous hypophosphorous acid

aqueous hypophosphorous acid

2-Nitro-2'-hydroxy-3',5'-di-tert-pentyl-azobenzene

25973-55-1

tinuvin 328

Conditions
ConditionsYield
With hydrogenchloride; hydrogen; tert-butylamine In methanol99%

C22H29N3O2

25973-55-1

tinuvin 328

Conditions
ConditionsYield
In isopropyl alcohol at 83 - 85℃; for 3h; Temperature;98.29%

2,4-bis(1",1"-dimethylpropyl)-6-(2'-nitrophenylazo)phenol

25973-55-1

tinuvin 328

Conditions
ConditionsYield
With borane-ammonia complex In toluene at 50℃; for 5h;96.4%
With sodium hydroxide; thiourea dioxide In ethanol at 85 - 90℃; for 1h;80%
With sodium hydroxide; lithium perchlorate In tetrahydrofuran; water at 20℃; Cyclization; Electrolysis;92 % Chromat.
With hydrogen In cyclohexane at 180℃; under 3750.38 Torr;
Multi-step reaction with 2 steps
1: 2,3-Dichloro-1,4-naphthoquinone; sodium hydroxide / isopropyl alcohol / 2 h / 42 - 45 °C / Inert atmosphere
2: isopropyl alcohol / 3 h / 83 - 85 °C
View Scheme

sodium azide

2,4-bis(1",1"-dimethylpropyl)-6-(2'-nitrophenylazo)phenol

25973-55-1

tinuvin 328

Conditions
ConditionsYield
In DMF (N,N-dimethyl-formamide) at 130℃; for 13h;93.9%

2-(2'-hydroxy-3',5'-di-t-pentylphenyl)benzotriazole oxynitride

25973-55-1

tinuvin 328

Conditions
ConditionsYield
With platinum on activated charcoal; hydrogen In methanol; toluene at 50 - 75℃; under 3750.38 - 6000.6 Torr; Reagent/catalyst; Solvent; Autoclave;91.7%
With hydrogenchloride; zinc In water; toluene Reflux;
94109-79-2

2-(2'H-benzotriazol-2'-yl)-4,6-bis(1",1"-dimethylpropyl)phenol 1'-oxide

25973-55-1

tinuvin 328

Conditions
ConditionsYield
aluminum nickel In water; hydrogen90.3%
With sodium hydroxide; bakers' yeast In ethanol 1.) r.t., 30 min, 2.) 80-85 deg C, 30 h;86%

2-Nitro-2'-hydroxy-3',5'-di-tert-pentyl-azobenzene

25973-55-1

tinuvin 328

Conditions
ConditionsYield
With sodium hydroxide; zinc In water at 90℃; for 0.5h;87%
85%
aluminum nickel In water; toluene82%
With samarium diiodide In tetrahydrofuran for 2.7h; Ambient temperature;85 % Spectr.
With hydrogenchloride; sulfuric acid; hydrogen; hydrazine hydrate; N-butylamine; pyrographite In methanol; 5,5-dimethyl-1,3-cyclohexadiene; water

2,4-Bis-(1,1-dimethyl-propyl)-6-(2-nitro-phenylazo)-phenol

25973-55-1

tinuvin 328

Conditions
ConditionsYield
With sodium hydroxide; bakers' yeast In ethanol 1.) r.t., 30 min, 2.) 80-85 deg C, 36 h;85%
With sodium hydroxide In isopropyl alcohol at 85℃; for 24h; Reduction; Cyclization; Irradiation;67%
Multi-step reaction with 2 steps
1: 87 percent / aq. NaOH, bakers' yeast / ethanol / 1.) r.t., 30 min, 2.) 80-85 deg C, 3.5 h
2: 86 percent / aq. NaOH, bakers' yeast / ethanol / 1.) r.t., 30 min, 2.) 80-85 deg C, 30 h
View Scheme

2,4-bis(1",1"-dimethylpropyl)-6-(2'-nitrophenylazo)phenol

A

23786-32-5

2-amino-4,6-bis(1,1-dimethylpropyl)phenol

B

95-54-5

1,2-diamino-benzene

C

25973-55-1

tinuvin 328

Conditions
ConditionsYield
With 2-bromo-2-nitropropane; zinc In methanol; dichloromethane for 3.5h; Ambient temperature;A n/a
B n/a
C 71 % Chromat.
117-80-6

2,3-Dichloro-1,4-naphthoquinone

2-Nitro-2'-hydroxy-3',5'-di-tert-pentyl-azobenzene

25973-55-1

tinuvin 328

Conditions
ConditionsYield
With sodium hydroxide; sodium hydrogensulfite In water; isopropyl alcohol

2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol Chemical Properties

Molecular Structure:

Molecular formula: C22H29N3O
Molecular Weight: 351.49 
IUPAC Name: 2-(benzotriazol-2-yl)-4,6-bis(2-methylbutan-2-yl)phenol
Synonyms of Phenol,2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)- (CAS NO.25973-55-1): 2-(2H-Benzotriazol-2-yl)-4,6-di-tert-pentylphenol ; CCRIS 8267 ; EINECS 247-384-8 ; 2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol ; Phenol, 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentyl- ; UV-328
CAS NO: 25973-55-1
Classification Code: Industrial/Fine Chemicals ; Polymer Additives ; Polymer Science ; Stabilizers
Melting point: 80-83°
Index of Refraction: 1.575
Molar Refractivity: 107.16 cm3
Molar Volume: 324.1 cm3
Surface Tension: 37.7 dyne/cm
Density: 1.08 g/cm3
Flash Point: 237.5 °C
Enthalpy of Vaporization: 75.94 kJ/mol
Boiling Point: 469.1 °C at 760 mmHg
Vapour Pressure: 2.01E-09 mmHg at 25°C
Canonical SMILES: CCC(C)(C)C1=CC(=C(C(=C1)N2N=C3C=CC=CC3=N2)O)C(C)(C)CC
InChI: InChI=1S/C22H29N3O/c1-7-21(3,4)15-13-16(22(5,
6)8-2)20(26)19(14-15)25-23-17-11-9-10-12-18(17)24-25/h9-14,26H,7-8H2,
1-6H3
InChIKey: ZMWRRFHBXARRRT-UHFFFAOYSA-N

2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol Safety Profile

Hazard Codes of Phenol,2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)- (CAS NO.25973-55-1): IrritantXi
Risk Statements: 36/37/38 
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36: Wear suitable protective clothing.

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