Organic Pigments

Pigment Yellow 191

Also Known As:C.I. 1879518795Monoazo pyrazolone, Ca

Find here high performance pigment yellow 191 at upto 70% discounted prices by leading manufacturer and suppliers of yellow pigment Origo Chem.

Pigment Yellow 191 - 1

Key Features

Stable quality and easy to disperse
High brightness and good opacity/coverage (grade dependent)
Heat resistance up to 280°C (system dependent)
Light fastness: 7 (scale 1–8)
Excellent overall durability (weather/chemical resistance)

Technical Specifications

C.I. NO.18795
CAS NO.129423-54-7
EU NO403-530-4
Molecular FormulaC17H13CIN4O7S2Ca
Chemical GroupMonoazo pyrazolone, Ca
Moisture≤1.5
Water Soluble Matter≤1.0
Electric Conductivity≤500
Fineness (80 mesh)≤5.0
pH Value6.5-7.5

Physical Data & Fastness Properties

Acid Resistance5
Alkali Resistance5
Alcohol Resistance5
Ester Resistance5
Benzene Resistance5
Soap Resistance5
Heat Resistance280
Light Fastness7

Application Fields

This product is widely used in the following application fields, providing excellent coloring performance and durability:

  • Automotive OEM/refinish coatings
  • Powder coatings
  • Printing inks (gravure/flexo)
  • Packaging inks
  • Paints and coatings
  • Plastics coloring

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Usage Instructions

Recommended dosage: 0.3–3.0% depending on color strength and application. For plastics/masterbatch, pre-disperse with suitable carrier resin and dispersant; for inks/coatings, mill to target fineness. Processing temperature should be controlled below 280°C (system dependent). Ensure good ventilation and use appropriate PPE. Store sealed in a cool, dry place.

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