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Benzimidazolone Yellow (PY151)
Pigment Yellow 151 (C.I. 13980) is a Monoazo of Benzimidazolone chemistry of medium yellow shade suitable for plastics, paints and coatings applications. It has additional limited use in inks applications.

Ferro is a leading global manufacturer of high performance Monoazo Benzimidazolone pigments.
These pigments cover the color spectrum from greenish yellow to orange. Used in conjunction with 5-(2' hydroxy-3'- naphtoylamino)-benzimidazolone as a coupling component, it imparts red colors ranging from medium red to carmine red, maroon and brown shades.
Ferro’s Lysopac Yellow (PY151) is a very opaque, relatively greenish-yellow shade of Benzimidazolone Yellow pigment with very good dispsersibility, excellent light and heat fastness. It has good overall fastness properties, making it a recommended pigment for coatings applications. It has additional limited use in plastics and inks applications.
BENZIMIDAZOLONE YELLOW (PY151) PRODUCT CHARACTERISTICS
HEAT FASTNESS | LIGHT FASTNESS |
WEATHER FASTNESS | ACID FASTNESS | ALKALI FASTNESS | SOLVENT FASTNESS |
200ºC* |
Good (7-8 on blue wool scale) |
Good (4-5 on grey scale) |
Excellent | Moderate | Good |
BENZIMIDAZOLONE YELLOW (PY151) RECOMMENDED PIGMENTS PROPERTIES AND APPLICATIONS
RECOMMENDED PIGMENT | PROPERTIES | APPLICATIONS |
Lysopac Yellow 5110C | Lysopac Yellow 5110C offers excellent overall fastness properties, good flow properties and dispersibility with relatively good opacity for an organic pigment. | Coatings Plastics including extruded plastic films, injection-molded plastics and fibers. Limited use in Inks |
Lysopac Yellow 5110P | Lysocpac 5110P offers higher dispersibility than Ferro’s standard Lysopac Yellow pigments. | Coatings Plastics including extruded plastic films, injection-molded plastics and fibers. Limited use in Inks |

VALUE ADDED SERVICES
Advanced Color Matching
Ferro technicians combine their talents with today's most advanced computer color analysis equipment to offer our customers precise color-matching services. Our spectrophotometry process minimizes metamerism, speeds up color matching, ensures consistent quality and helps identify the pigment combination that produces any given color for the lowest possible cost and right performance characteristics, including outdoor durability and NIR reflectance.
Ferro can match your color chip/drawdown or we can refer to complete files of OSHA, Munsel, RAL, Federal Standard 595 Series or Pantone® matching systems to achieve your reference number. All of our colors are matched to Ferro standards or your reference sample, ensuring precise color reproduction from order to order.
Providing Formulation Guides/Assistance with Startup Formula Creation
We assist customers in their product development efforts to ensure regulatory compliance (e.g., usage in food, cosmetics) and desired performance including anticorrosion, outdoor durability and NIR reflectance.
Our laboratory facility teams support customers’ production and development activities, including accelerated corrosion testing, weatherability testing, heat build-up and total solar reflectance testing and migration testing.
Custom Formulations
We work closely with our customers to co-innovate and develop customized high-performing and economical coloring solutions based on application requirements and operational processing needs, including custom formulations for paints, coatings, cement, concrete, inks, ceramics, glass, leather, metal and plastics.
Custom Manufacturing
Ferro provides custom manufacturing services to add value to specific projects, particularly in cases which our production facilities and know-how allow our customers to reach cost-efficiency targets or attain higher performing final products.
Toll Manufacturing
For customers who need additional manufacturing capabilities, we provide a full range of manufacturing capacities, from pilot runs to full-scale production.