1,4-Bis(2-benzoxazolyl)naphthalene
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1,4-Bis(2-benzoxazolyl)naphthalene
structure -
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CAS No:
5089-22-5
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Formula:
C24H14N2O2
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Chemical Name:
1,4-Bis(2-benzoxazolyl)naphthalene
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Synonyms:
Benzoxazole,2,2′-(1,4-naphthalenediyl)bis-;Benzoxazole,2,2′-(1,4-naphthylene)bis-;2,2′-(1,4-Naphthalenediyl)bis[benzoxazole];1,4-Bis(2-benzoxazolyl)naphthalene;1,4-Di(2-benzoxazolyl)naphthalene;Hostalux KCB;KCB;Fluorescent brightener KCB;2-[4-(1,3-Benzoxazol-2-yl)naphthalen-1-yl]-1,3-benzoxazole;Fluorescent brightener 367;1263217-20-4
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CAS No:
1,4-Bis(2-benzoxazolyl)naphthalene Basic Attributes
362.38000
362.38
613-200-3
Z945S0K4ZW
DTXSID6063698
3204200000
Characteristics
52.06000
6.2
yellow to green crystalline powder
1.32 g/cm3
212-213 °C
521.9ºC at 760 mmHg
263.1ºC
1.731
H2O: insoluble
Safety Information
S24/25
P273, P501
H413
H413 (100%): 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 68 companies from 3 notifications to the ECHA C&L Inventory.
1,4-Bis(2-benzoxazolyl)naphthalene Use and Manufacturing
Preparation of 1, 4-bis(benzoxazol-2'-yl)naphthalene in the Closed System; 0.71 g (3.3 mmol) of naphthalene-1, 4-dicarboxylic acid and 0.81 g (7.4 mmol) of o-aminophenol were suspended in 2.4 g of N-methylpyrrolidone in a pressure-resistant glass cuvette with stirring. The ammonium salt-containing suspension thus prepared was, after adding 169 mul of titanium tetrabutoxide, exposed to microwave irradiation of 300 W in the cuvette sealed pressure-tight with stirring and external cooling for 15 min. A temperature of approx. 225 C. measured by means of IR sensor was attained, and the pressure rose to nearly 20 bar. Subsequently, the reaction mixture was cooled to room temperature within 10 minutes, in the course of which the product crystallized out in the form of yellowish needles. The conversion based on naphthalene-1, 4-dicarboxylic acid was 83%. After filtration, washing of the crystals with ethanol, extraction of residual acid by stirring with alcoholic sodium hydroxide solution and drying, 1, 4-bis(benzoxazol-2'-yl)naphthalene was obtained with more than 99.5% purity. A further 15-minute microwave irradiation of the mother liquor which has been dried to remove water of reaction and consists essentially of solvent and unconverted reactants afforded a further 14% conversion (based on the amount of naphthalene-1, 4-dicarboxylic acid originally used).
Fluorescent brightener 367 is mainly used for the whitening of synthetic fibers and plastic products. It has a significant effect of increasing the gorgeousness of colored plastic products. It is also used for PE, PP, PVC, PS, ABS, etc.
Benzoxazole, 2,2'-(1,4-naphthalenediyl)bis-: ACTIVE
Cosmetics -> Uv absorber
Computed Properties
Molecular Weight:362.4
XLogP3:6.2
Hydrogen Bond Acceptor Count:4
Rotatable Bond Count:2
Exact Mass:362.105527694
Monoisotopic Mass:362.105527694
Topological Polar Surface Area:52.1
Heavy Atom Count:28
Complexity:509
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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1,4-Bis(2-benzoxazolyl)naphthalene
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