FULL SHADEP.R.166
TINT
Digital color reference · physical approval required
HIGH-PERFORMANCE PIGMENTS
Pigment Red 166
Pigment Red 166 is a disazo-condensation red with transparent commercial grades for plastics, coatings and inks. It is used where a scarlet-to-red color position is required without assuming high hiding power. Transparency, dispersion and processing stability should be confirmed in the target system.
- Color Index / grade
- P.R.166
- CAS
- 3905-19-9
- Chemical family
- Disazo-condensation pigment
- Published heat resistance
- 300 °C
- Light fastness
- 7 / 8
Typical application scopePlastics & masterbatch
PRODUCT PROFILE
P.R.166Pigment Red 166 — grade profile
Pigment Red 166 (P.R.166) is a disazo-condensation pigment for Plastics & masterbatch where processing stability and durability are defined selection criteria. Evaluate the grade in the intended resin or binder at the target loading and process conditions; every value below retains its published source and application context.
Published screening data includes published heat reference 300 °C and light fastness 7/8. Application-specific heat and fastness entries in the technical table take precedence.
Primary listed fits include PVC, Polyolefins (PO) and ABS; Polystyrene (PS) and PET are listed for evaluation.
Selection focus
At equal loading and dispersion, compare full shade, tint, transparency or opacity, heat stability, migration and the intended exposure conditions.
REFERENCE SHADE
Full shade and tint
Scarlet to red; grade dependent
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 Unpublished values are omitted.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 166
Color Index / product gradeP.R.166
Colorant categoryHigh-performance pigments
CAS number3905-19-9
C.I. constitution number20730
Molecular formulaC40H24Cl4N6O4
Chemical familyDisazo-condensation pigment
Physical appearanceColored powder
Heat resistance · catalogue reference300 °C
Light fastness7 / 8
Water resistance5 / 5
Oil resistance5 / 5
Acid resistance5 / 5
Alkali resistance5 / 5
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
Plastics & masterbatch
PVCPolyolefins (PO)ABS
Polystyrene (PS)PET
Application listings support initial selection and still require validation in the customer's resin, binder, process and end-use conditions.