Sulfur Yellow
Discover the Vibrant World of Sulfur Yellow
Sulfur Yellow is one of the most striking and versatile pigments available today. Used across multiple industries from paints to textiles, this bright yellow hue offers excellent coverage and durability. Below you'll find detailed specifications and technical data to help you understand why Sulfur Yellow should be your color of choice.
Product Specifications
- Color Index: Pigment Yellow 1 (PY1)
- Chemical Composition: Arylide yellow (monoazo)
- Lightfastness: Excellent (Rating 7-8 on Blue Wool Scale)
- Heat Resistance: Up to 180°C (356°F)
- Particle Size: 0.1-0.3 microns
- pH Value: 6.5-7.5 (neutral)
- Oil Absorption: 45-55 g/100g
Performance Characteristics
| Property | Value | Test Method |
|---|---|---|
| Opacity | 90-95% | ASTM D2805 |
| Tinting Strength | 100-105% (vs. standard) | ISO 787-24 |
| Weather Resistance | Excellent (500+ hours QUV) | ASTM G154 |
| Solvent Resistance | Good (minimal bleeding) | ASTM D279 |
| Dispersion Quality | Hegman 7+ | ASTM D1210 |
Frequently Asked Questions About Sulfur Yellow
What industries commonly use Sulfur Yellow?
Sulfur Yellow is widely used in automotive paints, industrial coatings, printing inks, plastics, and textile dyes. Its excellent lightfastness makes it particularly valuable for outdoor applications where color retention is crucial. The pigment meets strict automotive OEM specifications for exterior coatings.
How does Sulfur Yellow compare to other yellow pigments?
Sulfur Yellow offers superior brightness compared to ochres and earth tones, with better chemical resistance than many organic yellows. Unlike cadmium yellows, it contains no heavy metals, making it safer for environmental compliance. Among arylide yellows, our Sulfur Yellow variant provides the best balance between color strength and durability.
What are the storage requirements for Sulfur Yellow pigment?
Store Sulfur Yellow in its original packaging at temperatures between 5-30°C (41-86°F), protected from direct sunlight and moisture. The shelf life is 24 months when stored properly. For bulk quantities, maintain relative humidity below 65% to prevent clumping. Always seal containers tightly after use.
Application Guidelines
For optimal results with Sulfur Yellow, follow these professional recommendations:
| Application | Recommended Loading | Compatible Binders |
|---|---|---|
| Industrial Paints | 12-18% by weight | Alkyd, Epoxy, Polyurethane |
| Plastics | 0.5-2.5% by weight | PVC, PE, PP, ABS |
| Printing Inks | 8-12% by weight | Nitrocellulose, Polyamide |
| Textile Dyes | 1-3% owf (on weight of fabric) | Reactive, Disperse dyes |
Safety Information
Sulfur Yellow conforms to international safety standards:
- REACH compliant (EU Regulation No 1907/2006)
- OSHA Hazard Communication Standard compliant
- Non-hazardous according to GHS classification
- Contains no substances on California Prop 65 list
Can Sulfur Yellow be mixed with other pigments?
Yes, Sulfur Yellow exhibits excellent compatibility with most organic and inorganic pigments. For color mixing, we recommend testing compatibility with specific pigment combinations at recommended ratios. Some blue pigments may cause slight darkening over time due to chemical interactions.
What's the difference between Sulfur Yellow in powder vs. dispersion form?
Powdered Sulfur Yellow offers higher pigment concentration (95-98%) and longer shelf life, requiring proper dispersion equipment. Predispersed forms (50-60% pigment) provide easier handling and faster incorporation but may have viscosity limitations in some formulations.
Does Sulfur Yellow meet food contact regulations?
Our standard Sulfur Yellow pigment is not approved for direct food contact. However, we offer a special FDA-compliant grade (21 CFR 178.3297) for indirect food contact applications like packaging materials when properly formulated with approved binders.
Technical Support
Our technical team can provide:
- Color matching services with Sulfur Yellow
- Formulation assistance for specific applications
- Regulatory documentation and SDS
- Small batch samples for testing
- Troubleshooting for application challenges