Product Name

  • Name

    Octrizole

  • EINECS 221-573-5
  • CAS No. 3147-75-9
  • Article Data26
  • CAS DataBase
  • Density 1.1 g/cm3
  • Solubility 2μg/L at 20℃
  • Melting Point 101-108 °C
  • Formula C20H25N3O
  • Boiling Point 471.8 °C at 760 mmHg
  • Molecular Weight 323.438
  • Flash Point 239.2 °C
  • Transport Information
  • Appearance Slightly yellowish powder
  • Safety 26-37/39
  • Risk Codes 36/37/38
  • Molecular Structure Molecular Structure of 3147-75-9 (Octrizole)
  • Hazard Symbols IrritantXi
  • Synonyms 2-(2'-Hydroxy-5'-t-octylphenyl)benzotriazole;Octrizole [USAN:INN];Phenol, 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)-;UV Absorber-5;2-(2'-Hydroxy-5'-(1,1,3,3-tetramethylbutyl)phenyl)benzotriazole;2-(2'-Hydroxy-5'-tert-octylphenyl)benzotriazole;2-(2-Hydroxy-5-t-octylphenyl)-2H-benzotriazole;2-(2H-Benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol;2-(5'-tert-Octyl-2'-hydroxyphenyl)benzotriazole;2-(5-t-Octyl-2-hydroxyphenyl)benzotriazole;2-Benzotriazolyl-4-tert-octylphenol;Cyasorb 5411;Cyasorb UV 5411;Octrizo;Octrizol [INN-Spanish];2-(2-Hydroxy-5-tert-octylphenyl)benzotriazole;Seesorb 709;Spectra-Sorb UV 5411;Sumisorb 340;UNII-R775Y233N3;Viosorb 583;
  • PSA 50.94000
  • LogP 4.83990

Synthetic route

C20H25N3O2

C20H25N3O2

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
In isopropyl alcohol at 80 - 82℃; for 4h;97.5%
2-(2'-hydroxy-5'-tert-octylphenyl)nitrodiazobenzene
51656-57-6

2-(2'-hydroxy-5'-tert-octylphenyl)nitrodiazobenzene

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
With methanol; Aminoiminomethanesulfinic acid; sodium hydroxide In toluene at 50 - 80℃; for 0.5h; Reagent/catalyst; Solvent; Temperature;96.4%
With sodium hydroxide; zinc In water; Petroleum ether at 50℃; for 5h;
2-(2-Nitro-phenylazo)-4-(1,1,3,3-tetramethyl-butyl)-phenol
51656-57-6

2-(2-Nitro-phenylazo)-4-(1,1,3,3-tetramethyl-butyl)-phenol

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
With sodium hydroxide; thiourea S,S-dioxide In water; isopropyl alcohol for 3h; Heating;96%
2-nitro-2-hydroxy-5-tert-octyl-azobenzene

2-nitro-2-hydroxy-5-tert-octyl-azobenzene

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
93%
2-nitro-aniline
88-74-4

2-nitro-aniline

tert-octylphenol
140-66-9

tert-octylphenol

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
Stage #1: 2-nitro-aniline With sulfuric acid In water for 0.333333h;
Stage #2: With sodium nitrite In water at 0℃; for 2.5h; Cooling with ice;
Stage #3: tert-octylphenol Further stages;		90.01%
Multi-step reaction with 2 steps
1.1: sodium nitrite; hydrogenchloride / water / -15 - 5 °C
1.2: 2 h / 0 °C
2.1: zinc; sodium hydroxide / water; Petroleum ether / 5 h / 50 °C
View Scheme
C20H25N3O2

C20H25N3O2

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
With hydrogenchloride In water; toluene at 70℃; for 2h; Concentration; Temperature; Reagent/catalyst;89.5%
With hydrogenchloride; zinc In toluene Reflux;88.2%
2-nitro-2'-hydroxy-5'-tert-octylazobenzene

2-nitro-2'-hydroxy-5'-tert-octylazobenzene

2-nitro-2'-hydroxy-5'-tert-butylazobenzene
27959-42-8

2-nitro-2'-hydroxy-5'-tert-butylazobenzene

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
85%
85%
2-nitro-2'-hydroxy-5'-tert-octylazobenzene

2-nitro-2'-hydroxy-5'-tert-octylazobenzene

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

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

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
83.7%
2-nitro-2'-hydroxy-5'-tert-octylazobenzene

2-nitro-2'-hydroxy-5'-tert-octylazobenzene

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
With dimethyl amine; palladium-carbon In water; toluene82.9%
2-nitro-2'-hydroxy-5'-tert-octylazobenzene

2-nitro-2'-hydroxy-5'-tert-octylazobenzene

9-fluorenone
486-25-9

9-fluorenone

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
With sodium hydroxide; sulfuric acid; paraformaldehyde In methanol; water
With sodium hydroxide; sulfuric acid; paraformaldehyde In methanol; water
2-Chloronitrobenzene
88-73-3

2-Chloronitrobenzene

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: ammonium hydroxide / 150 - 220 °C / 90009 - 150015 Torr
2: sodium nitrite; hydrogenchloride / water / 1 h / 10 °C
3: sodium hydroxide / water; ethanol / 3 h / 10 °C / pH 7.2-7.8
4: sodium hydroxide; formaldehyd / Reflux
5: zinc; hydrogenchloride / toluene / Reflux
View Scheme
2-nitro-aniline
88-74-4

2-nitro-aniline

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium nitrite; hydrogenchloride / water / 1 h / 10 °C
2: sodium hydroxide / water; ethanol / 3 h / 10 °C / pH 7.2-7.8
3: sodium hydroxide; formaldehyd / Reflux
4: zinc; hydrogenchloride / toluene / Reflux
View Scheme
2-nitrobenzenediazonium chloride
119-66-4

2-nitrobenzenediazonium chloride

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: sodium hydroxide / water; ethanol / 3 h / 10 °C / pH 7.2-7.8
2: sodium hydroxide; formaldehyd / Reflux
3: zinc; hydrogenchloride / toluene / Reflux
View Scheme
trifluoromethylsulfonic anhydride
358-23-6

trifluoromethylsulfonic anhydride

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

trifluoromethanesulfonic acid 2-benzotriazol-2-yl-4-(1,1,3,3-tetramethylbutyl)phenyl ester
943024-15-5

trifluoromethanesulfonic acid 2-benzotriazol-2-yl-4-(1,1,3,3-tetramethylbutyl)phenyl ester

Conditions
ConditionsYield
With pyridine In dichloromethane at 20 - 30℃;100%
diethylamine
109-89-7

diethylamine

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

2-(2-hydroxy-3-diethylaminomethyl-5-tert-octylphenyl)-2H-benzotriazole

2-(2-hydroxy-3-diethylaminomethyl-5-tert-octylphenyl)-2H-benzotriazole

Conditions
ConditionsYield
With paraformaldehyde In butan-1-ol99%
With paraformaldehyde In butan-1-ol99%
With paraformaldehyde In butan-1-ol99%
formaldehyd
50-00-0

formaldehyd

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

methylene bis-benzotriazolyl tetramethylbutylphenol
103597-45-1

methylene bis-benzotriazolyl tetramethylbutylphenol

Conditions
ConditionsYield
Stage #1: formaldehyd; Cyasorb UV 5411 With diethylamine In 1,3,5-trimethyl-benzene at 130℃; for 4h;
Stage #2: With sodium methylate In 1,3,5-trimethyl-benzene at 160℃; for 5h; Temperature; Solvent; Reagent/catalyst;		96.3%
dibutylamine
111-92-2

dibutylamine

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

2-[2-Hydroxy-3-(di-n-butylaminomethyl)-5-tert-octylphenyl]-2H-benzotriazole

2-[2-Hydroxy-3-(di-n-butylaminomethyl)-5-tert-octylphenyl]-2H-benzotriazole

Conditions
ConditionsYield
With paraformaldehyde96%
tetrakis(dimethylamido)zirconium (IV)
19756-04-8

tetrakis(dimethylamido)zirconium (IV)

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

[(2-(2H-benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol)2(-H)4Zr]

[(2-(2H-benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol)2(-H)4Zr]

Conditions
ConditionsYield
In hexane at 25℃; for 1h; Inert atmosphere;95%
Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

2-(2H-benzo[1,2,3]triazol-2-yl)-6-bromo-4-(2,4,4-trimethylpentan-2-yl)phenol

2-(2H-benzo[1,2,3]triazol-2-yl)-6-bromo-4-(2,4,4-trimethylpentan-2-yl)phenol

Conditions
ConditionsYield
With bromine In dichloromethane at 20℃; for 8h;95%
With 1,3-dibromo-5,5-dimethylimidazolidine-2,4-dione In chloroform at 20℃;91%
With 1,3-dibromo-5,5-dimethylimidazolidine-2,4-dione In chloroform at 20℃;91%
water
7732-18-5

water

trimethylaluminum
75-24-1

trimethylaluminum

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

bis[2-(2H-benzotriazol-2-yl-κN)-4-(1,1,3,3-tetramethylbutyl)phenolato-κO]methylaluminum(III) dihydrate

bis[2-(2H-benzotriazol-2-yl-κN)-4-(1,1,3,3-tetramethylbutyl)phenolato-κO]methylaluminum(III) dihydrate

Conditions
ConditionsYield
Stage #1: trimethylaluminum; Cyasorb UV 5411 In hexane; toluene at -78 - 20℃; for 72h; Inert atmosphere;
Stage #2: water		95%
...Expand
p-formaldehyde

p-formaldehyde

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

methylene bis-benzotriazolyl tetramethylbutylphenol
103597-45-1

methylene bis-benzotriazolyl tetramethylbutylphenol

Conditions
ConditionsYield
Stage #1: p-formaldehyde; Cyasorb UV 5411 With diethylamine In xylene at 95 - 100℃; for 24h;
Stage #2: With sodium methylate In methanol at 145 - 150℃; for 10h;		92%
tetra(isopropoxy)hafnium isopropanol
1070655-38-7

tetra(isopropoxy)hafnium isopropanol

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

[(2-(2H-benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol)4Hf]

[(2-(2H-benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol)4Hf]

Conditions
ConditionsYield
In hexane at 30℃; for 12h; Inert atmosphere;92%
Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

isopropenylbenzene
98-83-9

isopropenylbenzene

2-[2'-hydroxy-3'-(α,α-dimethylbenzyl)-5'-(1,1,3,3-tetramethylbutyl)phenyl]benzotriazole
73936-91-1

2-[2'-hydroxy-3'-(α,α-dimethylbenzyl)-5'-(1,1,3,3-tetramethylbutyl)phenyl]benzotriazole

Conditions
ConditionsYield
With methanesulfonic acid at 175 - 180℃; for 6.5h; Temperature; Inert atmosphere;90.3%
chloroform
67-66-3

chloroform

water
7732-18-5

water

dimethylaluminum chloride
1184-58-3

dimethylaluminum chloride

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

bis[2-(2H-benzotriazol-2-yl-κN)-4-(1,1,3,3-tetramethylbutyl)phenolato-κO]chloroaluminum(III)*H2O*CHCl3

bis[2-(2H-benzotriazol-2-yl-κN)-4-(1,1,3,3-tetramethylbutyl)phenolato-κO]chloroaluminum(III)*H2O*CHCl3

Conditions
ConditionsYield
Stage #1: dimethylaluminum chloride; Cyasorb UV 5411 In tetrahydrofuran; hexane at -78 - 20℃; for 72h; Inert atmosphere;
Stage #2: chloroform; water		90%
...Expand
Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

2-(2-Hydroxyphenyl)-2H-benzotriazole
10096-91-0

2-(2-Hydroxyphenyl)-2H-benzotriazole

Conditions
ConditionsYield
With aluminium trichloride; nitromethane In toluene for 7h; Heating;88%
nonaethyleneglycol mono(p-toluenesulfonyl) ether
62573-11-9

nonaethyleneglycol mono(p-toluenesulfonyl) ether

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

nonaethylene glycol mono(2-(benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenyl) ether

nonaethylene glycol mono(2-(benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenyl) ether

Conditions
ConditionsYield
Stage #1: Cyasorb UV 5411 With sodium hydride In tetrahydrofuran; mineral oil at 20℃; for 1h;
Stage #2: nonaethyleneglycol mono(p-toluenesulfonyl) ether In tetrahydrofuran; mineral oil at 20℃; for 24h;		87%
zirconium(IV) tetraisopropoxide 2-propanol
14717-56-7

zirconium(IV) tetraisopropoxide 2-propanol

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

[(2-(2H-benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol)2(-H)Zr(OiPr)2]

[(2-(2H-benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol)2(-H)Zr(OiPr)2]

Conditions
ConditionsYield
In hexane at 0℃; for 2h; Inert atmosphere;85%
bis-(dipropylamino)methane
10333-53-6

bis-(dipropylamino)methane

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

methylene bis-benzotriazolyl tetramethylbutylphenol
103597-45-1

methylene bis-benzotriazolyl tetramethylbutylphenol

Conditions
ConditionsYield
With tetrabutylammomium bromide; sodium hydroxide In neat (no solvent) at 130℃; under 100 Torr; for 2h; Temperature;80.9%
With sodium hydroxide at 120 - 160℃; under 100 Torr; for 4h; Time;70.3%
Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

difluoro-[2-(2H-benzotriazol-2-yl-κN)-4-(1,1,3,3-tetramethylbutyl)-phenolate-κO]-boron
1198179-86-0

difluoro-[2-(2H-benzotriazol-2-yl-κN)-4-(1,1,3,3-tetramethylbutyl)-phenolate-κO]-boron

Conditions
ConditionsYield
With boron trifluoride diethyl etherate In toluene at -78℃; Inert atmosphere; Reflux;80%
boron trifluoride diethyl etherate
109-63-7

boron trifluoride diethyl etherate

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

difluoro-[2-(2H-benzotriazol-2-yl-κN)-4-(1,1,3,3-tetramethylbutyl)-phenolate-κO]-boron
1198179-86-0

difluoro-[2-(2H-benzotriazol-2-yl-κN)-4-(1,1,3,3-tetramethylbutyl)-phenolate-κO]-boron

Conditions
ConditionsYield
In toluene benzotriazole-compd. dissolved in dried toluene, cooled to -78°C under N2, B-compd. added dropwise, refluxed for 6 h, cooled; evaporated in vac., crystallized from CHCl3, elem. anal.;80%
tetra(isopropoxy)hafnium isopropanol
1070655-38-7

tetra(isopropoxy)hafnium isopropanol

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

[(2-(2H-benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol)2Hf(OiPr)2]

[(2-(2H-benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol)2Hf(OiPr)2]

Conditions
ConditionsYield
In hexane at 0℃; for 3h; Inert atmosphere;80%
titanium(IV) isopropylate
546-68-9

titanium(IV) isopropylate

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

[(μ-2-(2H-benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenolate)Ti(OiPr)3]2
1416561-82-4

[(μ-2-(2H-benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenolate)Ti(OiPr)3]2

Conditions
ConditionsYield
In hexane at 20℃; for 18h; Inert atmosphere;77%
formaldehyd
50-00-0

formaldehyd

diisopropylamine
108-18-9

diisopropylamine

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

2-(2H-benzotriazol-2-yl)-6-((diisopropylamino)-methyl)-4-(2,4,4-trimethylpentan-2-yl)phenol

2-(2H-benzotriazol-2-yl)-6-((diisopropylamino)-methyl)-4-(2,4,4-trimethylpentan-2-yl)phenol

Conditions
ConditionsYield
With triethylamine for 48h; Mannich Aminomethylation; Inert atmosphere; Reflux;76%
...Expand
formaldehyd
50-00-0

formaldehyd

Cyasorb UV 5411
3147-75-9

Cyasorb UV 5411

N,N`-dimethylethylenediamine
110-70-3

N,N`-dimethylethylenediamine

C46H62N8O2

C46H62N8O2

Conditions
ConditionsYield
In ethanol for 72h; Mannich Aminomethylation; Reflux;76%
In ethanol Reflux;
...Expand

Octrizole Chemical Properties

Molecular Structure:

IUPAC Name:  2-(Benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol
Synonyms of 2-(2-Hydroxy-5-tert-octylphenyl)benzotriazole (CAS NO.3147-75-9): 2-(2'-Hydroxy-5'-t-octylphenyl)benzotriazole ; Octrizole [USAN:INN] ; Phenol, 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)- ; UV Absorber-5 ; 2-(2'-Hydroxy-5'-(1,1,3,3-tetramethylbutyl)phenyl)benzotriazole ; 2-(2'-Hydroxy-5'-tert-octylphenyl)benzotriazole ; 2-(2'-Hydroxy-5'-tert-octylphenyl)benztriazole;  2-(2-Hydroxy-5-t-octylphenyl)-2H-benzotriazole;  2-(2-Hydroxy-5-tert-octylphenyl)-2H-benzotriazole ; 2-(2H-Benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol ; 2-(5'-tert-Octyl-2'-hydroxyphenyl)benzotriazole ; 2-(5-t-Octyl-2-hydroxyphenyl)benzotriazole ; 2-Benzotriazolyl-4-tert-octylphenol ; Cyasorb 5411 ; Cyasorb UV 5411 ; EINECS 221-573-5 ; Octrizol ; Octrizol [INN-Spanish] ; Octrizole ; Octrizolum ; Octrizolum [INN-Latin] ; Seesorb 709 ; Spectra-Sorb UV 5411 ; Sumisorb 340 ; Tinuvin 329 ; UNII-R775Y233N3 ; Viosorb 583 ; UV-329 
Registry Number: 3147-75-9 
Deleted Registry Number(s): 123307-21-1 
Molecular Formula: C20H25N3O  
Molecular Weight: 323.432
H bond acceptors: 4
H bond donors: 1
Freely Rotating Bonds: 5
Polar Surface Area: 39.94 Å2
Index of Refraction: 1.584
Molar Refractivity: 98.12 cm3
Molar Volume: 292.8 cm3 
Surface Tension: 39.3 dyne/cm
Density: 1.1 g/cm3
Flash Point: 239.2 °C
Enthalpy of Vaporization: 76.27 kJ/mol
Boiling Point: 471.8 °C at 760 mmHg
Vapour Pressure: 1.58E-09 mmHg at 25°C 

Octrizole Uses

 2-(2-Hydroxy-5-tert-octylphenyl)benzotriazole (CAS NO.3147-75-9) is used as polystyrene, poly methyl methacrylate, polyester, rigid PVC, polycarbonate, ABS resin, etc.

Octrizole Safety Profile

Hazard Codes: XiIrritant
Risk Statements of 2-(2-Hydroxy-5-tert-octylphenyl)benzotriazole (CAS NO.3147-75-9): 36/37/38
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 26-37/39
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39: Wear suitable gloves and eye/face protection.
WGK Germany: 1

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