Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

BASF UVITEX OB-CO Fluorescent Brightener

BASF Uvitex OB-CO is a yellow-green powder fluorescent brightener for polymer processing. It has excellent thermal/light stability, low volatility, good compatibility, dissolves well in organic solvents, delivers pure blue effect at low dosage, and can act as a tracer

Features Of BASF UVITEX OB-CO Fluorescent Brightener

  1. Excellent thermal resistance, suitable for high-temperature polymer processes like extrusion and injection molding.

  2. Good light stability, maintains long-term whitening effect, and can be combined with UVA for better weather resistance.

  3. High compatibility with polymers and organic solvents, with good dispersibility and no precipitation risk.

  4. High whitening efficiency, with clear dosage ranges for different substrates to meet differentiated needs.

  5. Complies with basic packaging material requirements, subject to local regulations and standards.

Typical Applications Of BASF UVITEX OB-CO Fluorescent Brightener

  1. Suitable for optical brightening of engineering plastics such as polyester, polyamide and polycarbonate.

  2. Fits processing of general plastics like acrylate, PVC, polystyrene and polyolefin.

  3. Used to improve whiteness and gloss of thermoplastic polyurethane and adhesive systems.

  4. Applied in whitening films and sheets with uniform and stable effect.

  5. Serves as a fluorescent tracer in polymer processing and application.

Specifications Of BASF UVITEX OB-CO Fluorescent Brightener


ParameterSpecification / Value
AppearanceYellow-green powder
Chemical Name2,2'-(2,5-Thiophenediyl)bis[5-(1,1-dimethylethyl)]-benzotriazole
CAS No.7124-58-6
Molecular Weight430.6 g/mol
Melting Range196 - 202 °C
Flash Point> 350 °C
Density (20°C)1.26 g/cm³
Vapor Pressure (20°C)2.6 x 10⁻⁸ Pa
λ max (CHCl₃) / K375 nm / 113.0
Water Solubility (20°C)< 0.01 % (w/w)
Acetone Solubility (20°C)0.5 % (w/w)
Chloroform Solubility (20°C)14 % (w/w)
Ethyl Acetate Solubility (20°C)1 % (w/w)
n-Hexane Solubility (20°C)0.2 % (w/w)
Methanol Solubility (20°C)< 0.1 % (w/w)
Recommended Dosage (Polyolefin)0.0005 - 0.0010 % (w/w)
Recommended Dosage (Other Plastics)0.005 - 0.100 % (w/w)







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