Pigment Orange 13
Pigment Orange 13 is a bright reddish orange disazo pyrazolone pigment with high color strength, used mainly in printing inks, registered as C.I. 21110 (CAS 3520-72-7). Heat stability reaches 180°C in plastics systems while light fastness is rated 4, keeping colour integrity under outdoor exposure. Typical end uses span Printing inks (gravure/flexo), Packaging inks, Paints and coatings, Plastics coloring.
Key Features
Technical Specifications
| C.I. NO. | 21110 |
| CAS NO. | 3520-72-7 |
| EU NO | 222-530-3 |
| Molecular Formula | C32H24CI2N8O2 |
| Chemical Group | Disazo Pyrazolone |
| Moisture | ≤2.0 |
| Water Soluble Matter | ≤1.5 |
| Electric Conductivity | ≤500 |
| Fineness (80 mesh) | ≤5.0 |
| pH Value | 6.0-7.0 |
Physical Data & Fastness Properties
| Acid Resistance | 6 |
| Alkali Resistance | 8 |
| Alcohol Resistance | 6 |
| Ester Resistance | 9 |
| Benzene Resistance | 7 |
| Soap Resistance | 8 |
| Heat Resistance | 180°C |
| Light Fastness | 4 |
Application Fields
This product is widely used in the following application fields, providing excellent coloring performance and durability:
- Printing inks (gravure/flexo)
- Packaging inks
- Paints and coatings
- Plastics coloring
- Masterbatch production
Usage Instructions
Recommended dosage: 0.3–3.0% depending on color strength and application. For plastics/masterbatch, pre-disperse with suitable carrier resin and dispersant; for inks/coatings, mill to target fineness. Processing temperature should be controlled below 260°C (system dependent). Ensure good ventilation and use appropriate PPE. Store sealed in a cool, dry place.
Frequently Asked Questions
What is Pigment Orange 13 used for?
Pigment Orange 13 is mainly used for transparent coloring of Printing inks (gravure/flexo), Packaging inks, Paints and coatings, Plastics coloring and other polymers, and can also be used for masterbatch production.
What are the key properties of Pigment Orange 13?
Pigment Orange 13 offers a heat resistance of 180°C, and has light fastness rated 4, and has a Disazo Pyrazolone chemical structure.
What is the CAS number of Pigment Orange 13?
The CAS number of Pigment Orange 13 is 3520-72-7, and its Colour Index number is C.I. 21110.
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