FULL SHADEP.R.3
TINT
Digital color reference · physical approval required
ORGANIC PIGMENTS
Pigment Red 3
Pigment Red 3 is a beta-naphthol pigment commonly known as Toluidine Red. It provides a bright, comparatively opaque red option for industrial paints, water-based inks and pigment textile printing. Select the grade to suit the intended binder and required resistance profile.
- Color Index / grade
- P.R.3
- CAS
- 2425-85-6
- Chemical family
- Beta-naphthol pigment
- Published heat resistance
- 150 °C
- Light fastness
- 6 / 8
Typical application scopeCoatings & paint · Printing inks
PRODUCT PROFILE
P.R.3Pigment Red 3 — grade profile
Pigment Red 3 (P.R.3) is a beta-naphthol pigment for Coatings & paint and Printing inks. Compare shade, tinting strength, dispersion and processing stability in the customer’s actual resin or binder rather than relying on one universal value.
Published screening data includes published heat reference 150 °C, light fastness 6/8 and oil absorption 30–40 ml/100g. Application-specific heat and fastness entries in the technical table take precedence.
Primary listed fits include Industrial coatings and NC inks; Water-based inks are listed for evaluation.
Selection focus
At equal loading, compare shade, tinting strength, dispersion and resin or binder compatibility, then confirm the required fastness under the final process conditions.
REFERENCE SHADE
Full shade and tint
Bright red
Full shade
Tint / reduction
Manufacturer-published shade descriptions were used to correct the color direction. Screen colors remain visual references, not batch standards; approve a physical drawdown or molded plaque under agreed test conditions.
TECHNICAL DATA
Published specifications
Only identified or numerical fields supported by public registry and product-table data are shown. Unpublished values are omitted.
ParameterPublished value
Product namePigment Red 3
Color Index / product gradeP.R.3
Colorant categoryOrganic pigments
CAS number2425-85-6
C.I. constitution number12120
Molecular formulaC17H13N3O3
Chemical familyBeta-naphthol pigment
Physical appearanceColored powder
Light fastness6 / 8
Acid resistance4 / 5
Alkali resistance5 / 5
Oil absorption30–40 ml/100g
Performance values are catalogue references. The current grade TDS, test conditions and agreed batch COA govern product approval.
APPLICATION CHART
Recommended systems at a glance
Application areaRecommendedEvaluate
Coatings & paint
Industrial coatings
—
Printing inks
NC inks
Water-based inks
Application listings support initial selection and still require validation in the customer's resin, binder, process and end-use conditions.