Product Name

  • Name

    2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene

  • EINECS 230-426-4
  • CAS No. 7128-64-5
  • Article Data12
  • CAS DataBase
  • Density 1.185 g/cm3
  • Solubility Soluble in acetone and toluene. Insoluble in water.
  • Melting Point 199-201 °C(lit.)
  • Formula C26H26N2O2S
  • Boiling Point 531.2 °C at 760 mmHg
  • Molecular Weight 430.571
  • Flash Point 275.1 °C
  • Transport Information
  • Appearance light yellow-green crystals
  • Safety 24/25
  • Risk Codes 36/37/38
  • Molecular Structure Molecular Structure of 7128-64-5 (2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene)
  • Hazard Symbols
  • Synonyms B-184;FBA 184;OptiblancPL;UVITEX;2,4-DICHLORO-5-BROMOPYRIMIDINE,COLOURLESS OIL;EUTEX OB-RC;bbot150;UVITEX OB;UVITEX 2B;
  • PSA 80.30000
  • LogP 7.95950

Synthetic route

Thiophene-2,5-dicarboxylic acid
4282-31-9

Thiophene-2,5-dicarboxylic acid

2-amino-4-tert-butylphenol
1199-46-8

2-amino-4-tert-butylphenol

Uvitex OB
7128-64-5

Uvitex OB

Conditions
ConditionsYield
With boric acid In toluene at 170 - 240℃; Solvent; Temperature; Inert atmosphere;98.7%
Thiophene-2,5-dicarboxylic acid bis-[(5-tert-butyl-2-hydroxy-phenyl)-amide]

Thiophene-2,5-dicarboxylic acid bis-[(5-tert-butyl-2-hydroxy-phenyl)-amide]

Uvitex OB
7128-64-5

Uvitex OB

Conditions
ConditionsYield
at 200℃; for 3h; Yield given;
thiophene-2,5-dicarbonyl dichloride
3857-36-1

thiophene-2,5-dicarbonyl dichloride

Uvitex OB
7128-64-5

Uvitex OB

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: Heating
2: 3 h / 200 °C
View Scheme
Thiophene-2,5-dicarboxylic acid
4282-31-9

Thiophene-2,5-dicarboxylic acid

Uvitex OB
7128-64-5

Uvitex OB

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: N-methyl-2-pyrrolidone, thionyl chloride
2: Heating
3: 3 h / 200 °C
View Scheme
decacarbonyldirhenium(0)
14285-68-8

decacarbonyldirhenium(0)

1,2,4-trihydroxy-9,10-anthraquinone
81-54-9

1,2,4-trihydroxy-9,10-anthraquinone

Uvitex OB
7128-64-5

Uvitex OB

[(Re(CO)3)4(2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene)2(1,2,4-trihydroxy-9,10-anthraquinone(-2H))2]

[(Re(CO)3)4(2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene)2(1,2,4-trihydroxy-9,10-anthraquinone(-2H))2]

Conditions
ConditionsYield
In 1,2,5-trimethyl-benzene under reflux;99%
...Expand
decacarbonyldirhenium(0)
14285-68-8

decacarbonyldirhenium(0)

1,4-dihydroxy-9,10-anthracenedione
81-64-1

1,4-dihydroxy-9,10-anthracenedione

Uvitex OB
7128-64-5

Uvitex OB

[(Re(CO)3)4(2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene)2(1,4-dihydroxy-9,10-anthraquinone(-2H))2]
918153-35-2

[(Re(CO)3)4(2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene)2(1,4-dihydroxy-9,10-anthraquinone(-2H))2]

Conditions
ConditionsYield
In 1,2,5-trimethyl-benzene under reflux;99%
...Expand
iron (III) bromide

iron (III) bromide

Uvitex OB
7128-64-5

Uvitex OB

(2,5-bis-(5-tert-butyl-2-benzoxazolyl)thiophene)FeBr3

(2,5-bis-(5-tert-butyl-2-benzoxazolyl)thiophene)FeBr3

Conditions
ConditionsYield
In tetrahydrofuran Stirring for several h; Under Ar or N2;98%
decacarbonyldirhenium(0)
14285-68-8

decacarbonyldirhenium(0)

1,2,4-trihydroxy-9,10-anthraquinone
81-54-9

1,2,4-trihydroxy-9,10-anthraquinone

Uvitex OB
7128-64-5

Uvitex OB

C76H33N4O26Re4S2

C76H33N4O26Re4S2

Conditions
ConditionsYield
In 1,3,5-trimethyl-benzene Heating / reflux;
...Expand
decacarbonyldirhenium(0)
14285-68-8

decacarbonyldirhenium(0)

1,4-dihydroxy-9,10-anthracenedione
81-64-1

1,4-dihydroxy-9,10-anthracenedione

Uvitex OB
7128-64-5

Uvitex OB

C76H33N4O24Re4S2

C76H33N4O24Re4S2

Conditions
ConditionsYield
In 1,3,5-trimethyl-benzene Heating / reflux;
...Expand

Fluorescent Brightener 184 Consensus Reports

Reported in EPA TSCA Inventory.

Fluorescent Brightener 184 Specification

The Fluorescent Brightener 184, with the CAS registry number 7128-64-5,is also known as 2,5-Bis(5'-tert-butyl-2-benzoxazol-2-yl)thiophene; 2,5-Di(5-tert-butylbenzoxazol-2-yl)thiophene; BBOT. It belongs to the product categories of Industrial/Fine Chemicals;Organics;Electroluminescence;Functional Materials. This chemical's molecular formula is C26H26N2O2S and molecular weight is 430.56. What's more,Its systematic name is 2,5-Thiophenediylbis(5-tert-butyl-1,3-benzoxazole). It is a light yellow-green crystals which is stable,incompatible with strong oxidizing agents. It is irritating to eyes, respiratory system and skin,when you use it ,you should avoid contact with skin and eyes.

Physical properties about Fluorescent Brightener 184 are:
(1)ACD/LogP:  7.221; (2)# of Rule of 5 Violations:  1  ; (3)ACD/LogD (pH 5.5):  7.22; (4)ACD/LogD (pH 7.4):  7.22; (5)ACD/BCF (pH 5.5):  180379.00; (6)ACD/BCF (pH 7.4):  180987.80; (7)ACD/KOC (pH 5.5):  201156.00; (8)ACD/KOC (pH 7.4):  201835.00; (9)#H bond acceptors:  4; (10)#H bond donors:  0; (11)#Freely Rotating Bonds:  4; (12)Index of Refraction:  1.617; (13)Molar Refractivity:  127.062 cm3; (14)Molar Volume:  363.126 cm3; (15)Surface Tension:  44.3610000610352 dyne/cm; (16)Density:  1.186 g/cm3; (17)Flash Point:  275.064 °C; (18)Enthalpy of Vaporization:  77.636 kJ/mol; (19)Boiling Point:  531.207 °C at 760 mmHg; (20)Vapour Pressure:  0 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)SMILES:o1c5c(nc1c2sc(cc2)c3nc4cc(ccc4o3)C(C)(C)C)cc(cc5)C(C)(C)C;
(2)Std. InChI:InChI=1S/C26H26N2O2S/c1-25(2,3)15-7-9-19-17(13-15)27-23(29-19)21-11-12-22(31-21)24-28-18-14-16(26(4,5)6)8-10-20(18)30-24/h7-14H,1-6H3;
(3)Std. InChIKey:AIXZBGVLNVRQSS-UHFFFAOYSA-N.

The toxicity data of Fluorescent Brightener 184 are as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD50 oral > 10gm/kg (10000mg/kg)   MVC-Report. Vol. 2, Pg. 193, 1973.

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