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

CAS7128-64-5

MFC26H26N2O2S

MW430.56

EINECS230-426-4

Chemical Properties

Melting point	199-201 °C(lit.)
Boiling point	531.2±45.0 °C(Predicted)
Density	1.26
refractive index	1.6360 (estimate)
Flash point	>350°C
storage temp.	Keep in dark place,Sealed in dry,Room Temperature
solubility	toluene: soluble50mg/mL
form	powder
pka	3.03±0.10(Predicted)
Water Solubility	Soluble in acetone and toluene. Insoluble in water.
λmax	373nm(EtOH)(lit.)
Merck	14,1014
BRN	631803
Stability	Stable. Incompatible with strong oxidizing agents.
InChIKey	AIXZBGVLNVRQSS-UHFFFAOYSA-N
CAS DataBase Reference	7128-64-5(CAS DataBase Reference)
NIST Chemistry Reference	Benzoxazole, 2,2'-(2,5-thiophenediyl)bis[5-(1,1-dimethylethyl)-(7128-64-5)
EPA Substance Registry System	2,2'-(2,5-Thiophenediyl)bis[5-tert-butylbenzoxazole] (7128-64-5)

Safety Information

MSDS

Description

2,5-Bis (5-tert-butyl-2-benzoxazolyl) thiophene (also known as fluorescent brightener 184)¹ is used as an optical brightener, which converts UV light into visible light. It is also used as a fluorescent brightener for thermoplastic resins of polyvinyl chloride, acrylic resin, polyester fiber, thermoplastic plastic, ABS, cellulose acetate fiber, paint, coating and printing ink. It is also useful in detecting the presence of thin-film electrical contact lubricants^2-4.
Sources
1. https://pubchem.ncbi.nlm.nih.gov/compound/bbot#section=Top
2. https://www.alfa.com/zh-cn/catalog/A14928/
3. http://www.xcolorpigment.com/FLUORESCENT-BRIGHTENER-OB.html
4. http://www.offerchems.com/products/catalyst-auxiliary/fluorescent-brightener-184-cas-7128-64-5/
Chemical Properties

light yellow-green crystals
Uses

2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene is used as an optical brightener which converts UV light into visible light. It is also used as a fluorescent brightener for thermoplastic resins of polyvinyl chloride, acrylic resin, polyester fiber, paint, coating and printing ink. It is also useful in detecting the presence of thin-film electrical contact lubricants.
Uses

Optical brightener additive in polymers, fibers, films, inks, laquers, and paints. In liquid scintillators.
Safety Profile

Low toxicity by ingestion. Whenheated to decomposition it emits toxic vapors of NOx andSOx.

Properties and Applications

TEST ITEMS	SPECIFICATION
APPEARANCE	LIGHT YELLOW OR MILK WHITE POWDER
SHADE	LIGHT YELLOWISH
METLING POINT	201-202 ° C
PURITY	99% min
FINENESS	300 mesh min
SOLUBILITY	hardly soluble in water,but soluble in paraffin, mineral oils and ordinary organic solvents.