Pigment Red 176

Brand	Fineland Chem
Color Index	Pigment Red 176
Color Index No	12515
CAS No	12225-06-8
EC No	235-425-2
Chemical Group	Benzimidazolone
Chemical Formula	C₃₂H₂₄N₆O₅

What is Pigment Red 176

Pigment Red 176 (C.I. 12515) is an organic pigment belonging to the benzimidazolone pigment class, which is known for its balanced durability and color stability. It generally produces a bluish-red to deep red shade and is widely used in coatings, plastics, and printing inks.

The pigment is synthesized using benzimidazolone-based chemistry, resulting in a stable molecular structure that contributes to improved resistance properties compared with many traditional azo pigments. Pigment Red 176 is considered a medium- to high-performance organic pigment and is often selected for applications requiring reliable color stability and processing performance.

Due to its combination of color brightness and resistance properties, Pigment Red 176 is commonly used in industrial coloration systems where balanced performance is required.

Physical Properties

Test Item	Specification
Density (g/cm3 )	1.3-1.5
Specific Surface Area(m2/g)	81
Oil Absorption(g/100g)	30-40
PH Value	7-8
Bulk Density (lb/gal)	11.2-11.6
Total impurities(ppm)	≤600

Fastness Properties

Heat Resistance (℃)	280-300	Alkali Resistance (1-5)	6
Light Resistance (Full Shade, 1-8)	6-7	Migration Resistance(1-5)	4-5
Light (Reduced tinting, 1-8)	6	Ethyl Acetate (1-5)	4-5
Weather Resistance (1-5)	4-5	Ethanol (1-5)	5
Acid Resistance (1-5)	6	MEK (1-5)	4

Typical Applications

Pigment Red 176 is used in a variety of industrial coloring systems.

Typical applications include:

Industrial coatings
Used in decorative coatings, architectural paints, and general industrial coatings.
Plastic coloration
Suitable for plastics such as PVC, polyethylene (PE), polypropylene (PP), ABS, and other polymer systems.
Printing inks
Applied in packaging inks and certain publication ink formulations.
Powder coatings
Used in coating systems requiring stable red coloration and moderate heat resistance.

Key Performance Properties Related to Applications

The performance characteristics of Pigment Red 176 are influenced by its benzimidazolone pigment chemistry and crystalline structure.

Key properties include:

Color shade
Bluish-red to deep red tone with moderate chroma.
Tinting strength
Moderate to relatively strong tinting strength depending on formulation.
Lightfastness
Generally provides good resistance to light exposure in many indoor and outdoor applications.
Heat resistance
Suitable for polymer processing at moderate to relatively high temperatures.
Solvent resistance
Compatible with many solvents used in coatings and printing ink systems.

Advantages

Pure and Vivid Color, Excellent Coloring Effect: It exhibits a brilliant bluish-red shade with high purity and excellent color strength, with a hue angle of 2.1° (1/3 SD, HDPE), only slightly yellowish than C.I. Pigment Red 185. It can deliver vivid, full and long-lasting coloring effects in coatings, plastics and textiles.
Outstanding Weather Resistance and Stability, Suitable for Harsh Environments: It has a lightfastness grade of 6-7 (1/3 SD), combined with excellent weather resistance and thermal stability——heat resistance up to 200℃ in flexible PVC, and can withstand 300℃/1min (1/3 SD) in polypropylene dope dyeing, ensuring stable performance in outdoor and various demanding environments.
Excellent Chemical Resistance, Wide Compatibility: It has excellent chemical stability and can resist various chemical media. With good compatibility with both water-based and solvent-based systems, it is suitable for various applications including coatings, inks, plastics and rubber.

Typical Limitations

Pigment Red 176 may present certain limitations depending on application conditions.

Typical limitations include:

Tinting strength may vary depending on dispersion quality
Color shade may differ slightly depending on formulation and pigment grade
Durability may be lower than certain high-performance pigments such as DPP or perylene pigments

Buyer Guidance

When selecting Pigment Red 176 for industrial formulations, several factors are typically considered:

Processing temperature of plastics or coatings
Required lightfastness and weather resistance
Compatibility with binder or polymer systems
Dispersion characteristics within the formulation

Different commercial grades may offer variations in particle size distribution and surface treatment depending on the target application.

Synonyms

PR176	PVC Red K123	Anthraquinone red	PIGMENT RED 176
Graphtol Red CI-3Bl	Fast Carmine HF3C	Aquanyl P Carmine HF3C	Flexonyl Carmine HF3C-LA
Novoperm Carmine HF3C	Permanent Carmine HF3C	PV Carmine HF3C	Pigment Permanent Pink BH3C
Pigment Permanent Pink S3C	C.I. Pigment Red 176	1,4-Diketo-3,6-bis(4-chlorophenylamino)anthracene-9,10-dione	3,6-Bis(4-chlorophenylamino)-1,4-dioxo-1,4-dihydroanthracene-9,10-dione
4-[[2-methoxy-5-[(phenylamino)carbonyl]phenyl]azo]-n-(2,3-dihydro-2-oxo-1h-benzimidazol-5-yl)-3-hydroxy-2-naphthalenecarboxamid	n-(2,3-dihydro-2-oxo-1h-benzimidazol-5-yl)-3-hydroxy-4-[[2-methoxy-5-[(phenylamino)carbonyl]phenyl]azo]-2-naphthalenecarboxamide	N-(2,3-DIHYDRO-2-OXO-1H-BENZIMIDAZOL-5-YL)-3-HYDROXY-4-2-METHOXY-5-(PHENYLAMINO)CARBONYLPHENYLAZO-2-NAPHTHALENECARBOXAMIDE	3-HYDROXY-4-(2-METHOXY-4-PHENYLCARBAMOYL-PHENYLAZO)-NAPHTHALENE-2-CARBXYLIC ACID (2-OXO-2,3-DIHYDRO-1H-BENZOIMIDAZOL-5-YL)-AMIDE

Manufacturer and Supplier Information

Pigment Red 176 is produced by pigment manufacturers worldwide and is generally supplied as a powder pigment for industrial coloration applications including coatings, plastics, printing inks, and powder coatings.

Commercial grades may vary depending on particle size distribution, crystal form, and dispersion characteristics designed for specific application systems.