Product Name: Fluorescent brightener OB

Chemical name: 2.5-bis- (5-tert-butyl-2-benzoxazolyl) thiophene

Structural formula:

CAS No.:  7128-64-5

EC No.: 7128-64-5

Molecular formula: C26H26N2O2SH9C4

Molecular weight: 430

Properties:   This product is bright yellow crystalline powder, odorless. Melting point 196-203°C, decomposition temperature greater than 220°C. Insoluble in water, soluble in alkanes, aliphatic hydrocarbons, oil waxes and common organic solvents. Fluorescence color is blue light, maximum absorption wavelength is 375nm (ethanol).

Technical Conditions:

Appearance: Bright yellow-green crystalline powder

Color light: Vivid blue fluorescence (similar to standard)

Melting point:  196-203°C

Solid content: ≥99.5%

Fineness: ＞600mesh

Application: Mainly used for ink paint, thermoplastic, polyvinyl chloride, polyethylene, polypropylene, polystyrene, acrylonitrile/butadiene/styrene copolymer, styrene/acrylonitrile copolymer, styrene/butadiene copolymer, cellulose acetate, polyamide, polymethyl methacrylate, acrylic resin, polyester fiber (polyester), artificial stone

Dosage: 0.0001-0.0005

Packaging: Barrel, lined with plastic bags, net weight of 25KG per case, or packed according to user requirements.