Pigments & Colorants
REACH
Pigment red 2
CAS Number
6041-94-7
EC Number
227-930-1
What is Pigment red 2?
Pigment Red 2 (CAS 6041-94-7), also identified commercially as C.I. 12310, is a monoazo organic pigment delivering a strong, opaque red shade.
Where is Pigment red 2 used?
- Plastics: coloring rigid PVC and polyolefins
- Engineering polymers: consistent hue and thermal resistance during compounding
- Industrial coatings: deep red tones in solvent-based and water-based finishes, with good hiding power and reliable dispersion
- Packaging, label and publication inks: sharp color reproduction and press stability
- Textile and paper: pigment printing pastes and surface coating formulations requiring bleed resistance and lightfastness
- It is valued in manufacturing for its color strength, heat stability, and compatibility with common polymer and resin systems.
Commercial specifications
- Standard grades include general industrial and high-strength variants
- Particle size and surface treatment are tailored for ink, coating, or plastic end uses
- Packaging in fiber drums or multi-wall bags for bulk procurement and industrial storage
Other Names (Synonyms)
C.I. 12310|4-[(2,5-Dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide|2-Naphthalenecarboxamide, 4-((2,5-dichlorophenyl)azo)-3-hydroxy-N-phenyl-|2-Naphthalenecarboxamide, 4-(2-(2,5-dichlorophenyl)diazenyl)-3-hydroxy-N-phenyl-|C.I. Pigment Red 2|2-Naphthanilide, 4-(2,5-dichlorophenylazo)-3-hydroxy-|4-[2-(2,5-Dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-2-naphthalenecarboxamide
What are the physical properties of Pigment red 2?
Melting Point 310-311°C
Boiling Point 595.2±50.0 °C(Predicted)
Density 1.38±0.1 g/cm3(Predicted)
Appearance yellowish red or dark red powder
Color Red to Dark Red
Form Solid
Water Solubility <0.1 g/100 mL at 19 ºC
Vapor Pressure 0Pa at 25℃
Log P 3.2 at 23℃