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Tinopal® OB

Technical DataSheet | Supplied by BASF

Tinopal® OB by BASF is a 2,5-thiophenediylbis(5-tert-butyl-1,3-benzoxazole). It is a high molecular weight optical brightener / fluorescent whitening agent of the thiophenediyl benzoxazole class. Tinopal® OB features excellent resistance to heat, exceptional whitening properties, good light fastness and low volatility. It has a brilliant bluish cast, is readily soluble in organic solvents and features good compatibility in various substrates. Suitable for the optical brightening of polymers at all stages of processing. It is highly effective in polymer substrates such as engineering plastics such as polyesters, polycarbonate, polyamides and acrylics, thermoplastic polyurethane, polyvinylchloride, styrene homo- and copolymers, polyolefins and other organic substrates. Main applications include synthetic leather, adhesives and packaging applications.

Tinopal® OB Product details

Product Type
Chemical Composition
CAS Number
Physical Form
Yellow, Yellowish, greenish
Product Status
Applications/ Recommended for
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Tinopal® OB Properties


Value & Unit
Test Condition
Test Method
Melting range
xxxxxxxxx °C
Flash point
xxxxx °C
Vapor pressure @ 25°C
xxxxxxxxxx Pa
Molecular weight
xxxxx g/mol
Volatility (pure substance; TGA, heating rate in air @ 20°C/ min, 1.0% wt loss
xxx °C
Volatility (pure substance; TGA, heating rate in air @ 20°C/ min, 2% wt loss
xxx °C
Solubility @ 20°C in acetone
xxx % w/w
Solubility @ 20°C in chloroform
xx % w/w
Solubility @ 20°C in methanol
xxxxx % w/w
Solubility @ 20°C in water
xxxxxx % w/w
Specific gravity @ 20°C
Bulk density
xxxxxxxxxx g/ml
Angle of repose
xxxxxxx °
Solubility @ 20°C in n-hexane
xxx % w/w
Solubility @ 20°C in ethyl acetate
x % w/w
Volatility (pure substance; TGA, heating rate in air @ 20°C/ min, 5% wt loss
xxx °C
Last edited Jan 15, 2017
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