Azo / Naphthol Organic Red Series High Chroma

Pigment Red 112

Organic Azo Red — High-Chroma Series

A high-chroma naphthol azo red delivering vibrant, clean red shades with excellent flow properties and strong tinting strength. Widely used in packaging inks, industrial coatings, and stationery applications where vivid, consistent red colour is required at competitive cost.

pigment photo
CI Name
Pigment Red 112
CI Number
12370
Chemical Class
Azo / Naphthol
Shade
Vibrant Red
Heat Stability
Up to 200 °C
Product overview

Specifications

Naphthol azo chemistry — what it means in practice

Pigment Red 112 is a monoazo naphthol red produced by coupling a diazonium salt with a naphthol coupling component. This chemistry delivers high colour purity, good transparency in inks, and strong tinting strength — at a more accessible price point than complex polycyclic red pigments. The trade-off is moderate lightfastness and heat stability compared to perylene or quinacridone reds, making PR 112 best suited to indoor and packaging applications rather than exterior-durable uses.

Chemical class
Azo (Monoazo Naphthol)
Colour Index name
Pigment Red 112
Colour Index number
CI 12370
CAS number
6535-46-2
Shade tone
Vibrant / medium red
Specific gravity
~1.4 g/cm³
pH (10% slurry)
6.5 – 8.0
Available forms
Powder · Presscake · Dispersion
Heat stability
Stable up to 200 °C
Best use
Inks, coatings, stationery, plastics (indoor)
Technical performance

Performance Properties

PropertyStandard / NoteRating
LightfastnessISO 105-B02
Good (3/5)
Heat stabilityUp to 200 °C
Good (3/5)
Transparency
Very good (4/5)
Colour strengthTinting method
Very good (4/5)
DispersionMilling / grinding
Very good (4/5)
Flow propertiesInk viscosity
Excellent (5/5)
Acid resistance
Good (3/5)
Alkali resistance
Good (3/5)
End-use markets

Applications

Packaging Inks

High-chroma red for solvent-based and waterborne flexographic and gravure inks used in food and consumer packaging. Excellent flow properties minimise press issues and deliver consistent colour across long runs.

General Industrial Coatings

Used in decorative and general-purpose industrial coatings where vivid red shades are required for indoor or short-term outdoor applications. Verify lightfastness requirements before specifying for long-term exterior use.

Stationery & Office Inks

Widely used in ballpoint pen inks, stamp pad inks, and stationery products. The excellent flow properties and colour brightness of PR 112 are particularly valued in these precision ink applications.

Plastics (Indoor Applications)

Suitable for colouring plastics destined for indoor applications — stationery, toys, housewares — where ISO 7 exterior lightfastness is not required. Verify heat stability for your specific processing temperature.

Product forms

Available Forms

Dry Powder
Presscake
Dispersion
Custom Grade

Presscake form is ideal for solvent-flush pastes and high-quality ink grinding. Aqueous dispersions available for waterborne ink and coating systems. Contact us to specify concentration and vehicle compatibility.

Compliance

Regulatory Status

REACH Registered

Registered under EU REACH regulation. Full SDS available on request for compliance documentation.

Heavy Metal Free

Contains no lead, cadmium, mercury, or chromium VI. Meets international packaging and environmental directives.