Pigment Red 254 | Permanent Red DPP | CAS 84632-65-5

Pigment Red 254

Chinese aliases: Pigment Red 2254; Pigment Red BP; Irgazin DPP; BO Red; Ciba BO; Permanent Red DPP; China Red; Pyrrole Red; DPP Scarlet DP20
English name: Pigment Red 254
Molecular formula: C₁₈H₁₀Cl₂N₂O₂
Molecular weight: 357.19
CAS registry number: 84632-65-5
EINECS registry number: 401-540-3
Physical and chemical properties
Classification: Condensed azo pigment
Appearance: Red powder
Hue: Yellowish/Bluish
Density (g/cm³): 1.56-1.57
Specific gravity: 1.65 g/cm³
Oil absorption (g/100g): 35-45
pH value (10% slurry): 6.5-7.5
Covering power: Yellowish red (high covering type) has strong covering power, suitable for coatings and plastics requiring high coverage; Bluish red (semi-transparent type) has higher transparency, suitable for transparent inks or special effects
Product properties: Features bright color, strong covering power, good dispersibility, light and heat resistance, environmental safety, etc. Insoluble in water but dispersible in certain organic solvents. Widely used in inks, coatings, plastics, and other fields.
Lightfastness: Grade 8 (highest grade)
Heat resistance: 300°C/5min (in HDPE at 1/3 standard depth)
Solvent resistance: Grade 5 (excellent)
Weather resistance: Grade 4~5 (no fading after 2 years outdoors, requires antioxidants)
Acid resistance: Grade 5 (highest grade), can withstand strong acid and alkali environments
Alkali resistance: Grade 5 (highest grade), can withstand strong acid and alkali environments
Water resistance: Grade 5 (highest grade), completely insoluble in water with no migration
Migration resistance: Grade 5
Product applications:
I. Ink field
Water-based ink: Suitable for water-based ink systems, with excellent dispersibility and water resistance.
Solvent-based ink: Fully compatible with solvent-based inks, solvent resistance up to grade 5, strong color stability.
Offset ink: Recommended for offset inks, providing high tinting strength and bright neutral red.
II. Plastic field
PVC/PS/Polyolefins: Heat resistant up to 300°C/5min, no migration issues
HDPE/Engineering plastics: Maintains stability at 1/3 standard depth.
III. Coating field: Widely used in automotive primers, industrial coatings, weather resistance up to grade 5, excellent color matching with molybdate chrome red
IV. Printing paste field: Suitable for pigment printing pastes, resistant to acid and alkali with bright colors
Uses: Pigment Red 254 is widely used in printing inks due to its excellent color brightness and lightfastness, especially in water-based packaging inks and plastic packaging inks.
Coatings: In the coating field, Pigment Red 254 is also widely used for its high performance, providing durable red decorative effects for various substrates.
Plastics: Pigment Red 254 can be used for coloring PVC, PS, polyolefins, and other plastics, providing bright and durable red colors.