2,5-Bis(5′-tert-butyl-2-benzoxazolyl)thiophene
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2,5-Bis(5′-tert-butyl-2-benzoxazolyl)thiophene
structure -
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CAS No:
7128-64-5
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Formula:
C26H26N2O2S
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Chemical Name:
2,5-Bis(5′-tert-butyl-2-benzoxazolyl)thiophene
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Synonyms:
Benzoxazole,2,2′-(2,5-thiophenediyl)bis[5-(1,1-dimethylethyl)-;Benzoxazole,2,2′-(2,5-thiophenediyl)bis[5-tert-butyl-;2,2′-(2,5-Thiophenediyl)bis[5-(1,1-dimethylethyl)benzoxazole];2,5-Di(5-tert-butylbenzoxazol-2-yl)thiophene;2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene;2,2′-(2,5-Thiophenediyl)bis[5-tert-butylbenzoxazole];BBOT;2,5-Bis(5′-tert-butyl-2-benzoxazolyl)thiophene;Uvitex OB;BBOT 150;Uvitex 3BSA;C.I. Fluorescent Brightening Agent 184;C.I. Fluorescent Brightener 184;C.I. 515245;Fluorescent Brightener 184;Keyfluor White PL;O-B TECH;Uvitex OB 55;NSC 158163;C.I. FBA 184;OB;TBO;2,5-Bis(5-tert-butylbenzooxazol-2-yl)thiophene;Tinopal OB;B 0047;OB-FBA 184;Hitex OB;Brightener OB;MPI Bright 100;Benetex OB;Helios SC;SpeedBright OB 184;OB 184;Fluorescent brightener OB;2,2′-(2,5-Thiophenediyl)bis(5-tert-butylbenzoxazole);S-FN;Telalux OB;Tinopal OB-CO;Mayzo OB Plus;Benetex OB+;Benetex OB Plus;12224-40-7;59249-63-7;61229-63-8;144470-46-2;864446-12-8;1197996-34-1;1430334-83-0;2369674-07-5
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CAS No:
2,5-Bis(5′-tert-butyl-2-benzoxazolyl)thiophene Basic Attributes
430.56
430.56
631803
230-426-4
W7UR9129GP
158163
DTXSID1048205
2934999090
Characteristics
80.3
8.98
DryPowder; OtherSolid
1.2±0.1 g/cm3
201-202 °C
531.2°C at 760 mmHg
>350°C
1.617
soluble in acetone and toluene. Insoluble in water.toluene: soluble 50mg/mL
Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Oral-rat LD50: >10000 mg/kg
Flammable; burning produces toxic nitrogen oxides and sulfur oxide fumes
Safety Information
NONH for all modes of transport
1
36/37/38
24/25
DM4888332
Warehouse ventilated, low temperature and dry
Stable. Incompatible with strong oxidizing agents.
P273, P501
H413
H413 (97.73%): May cause long lasting harmful effects to aquatic life [Hazardous to the aquatic environment, long-term hazard]|P273, and P501|Aggregated GHS information provided by 3558 companies from 7 notifications to the ECHA C&L Inventory.
2,5-Bis(5′-tert-butyl-2-benzoxazolyl)thiophene Use and Manufacturing
Put 120 kg of chlorobenzene into the reactor and add 21 kg of o-amino-p-tert-butylphenol. Under stirring, 19 kg of chloromethyliminoethyl ether hydrochloride was slowly added dropwise at room temperature. After the drop, the temperature was increased to reflux. Reaction 3~4 h. Recover chloroform. About 24 kg of brown oil was obtained. Add 200 kg of water to the vulcanization kettle, and then add 45 kg of sodium disulfide and 0.5 kg of PTC (as a phase transfer catalyst). After stirring and dissolving, the solution was cooled to 10°C, the dichloromethane solution of the above reactant was added dropwise, stirred for 10 h, and allowed to stand for layer separation, and the organic layer was washed with water. Dichloromethane was recovered and about 23 kg of yellow solid was obtained. Dissolve it in 100 kg of dimethyl sulfoxide and add 2.8 kg of glyoxal. It was cooled to 0°C with stirring under nitrogen, and 20 kg of 30% sodium methoxide methanol solution was added dropwise. Reaction 5～6h. Acidify the material to a pH value of 5-6 with 1:2 dilute hydrochloric acid, distill off methanol under reduced pressure, cool and filter, and wash the filter cake with water until neutral and dry. Recrystallized with ethyl acetate to obtain optical brightener OB.
Optical brightener additive in polymers, fibers, films, inks, laquers, and paints.In liquid scintillators.
Dyes
Adhesives and sealants
100,000 - 500,000 lb
Plastics product manufacturing|Benzoxazole, 2,2'-(2,5-thiophenediyl)bis[5-(1,1-dimethylethyl)-: ACTIVE
Computed Properties
Molecular Weight:430.6
XLogP3:8
Hydrogen Bond Acceptor Count:5
Rotatable Bond Count:4
Exact Mass:430.17149925
Monoisotopic Mass:430.17149925
Topological Polar Surface Area:80.3
Heavy Atom Count:31
Complexity:590
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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2,5-Bis(5′-tert-butyl-2-benzoxazolyl)thiophene
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