Iron Oxide Red 4140 (Lanxess, Germany)
LANXESS Bayferrox Red 4140
Inorganic Pigments| Iron Oxide Series
Basic Specifications
| Product Name | Iron Oxide Red 4140 (Lanxess, Germany) |
| English Name | LANXESS Bayferrox Red 4140 |
| CAS Registry Number | 1309-37-1 |
| C.I. Number | Pigment Red 101 / C.I. 77491 |
| Molecular formula | Fe2O3 (alpha--Fe2O3 synthetic iron oxide red) |
| Molecular Weight | 159.7 |
| Product Categories | Inorganic Pigments |
| Product Line | Iron Oxide Series |
| Hue | Red (dark) |
| Appearance | Red powder |
| Density | Approx. 5.0 g/cm³ |
Product Features
- Deeper red hue, primary particle size 0.3μm, rich and deep color.
- High opacity, outperforming fine-particle grades.
- High-temperature resistant, stable from 800 to 900°C
- Lightfast and weather-resistant; 8-level lightfastness, fade-free outdoors for 8-10 years.
- Easily dispersible, spherical particles, minimal batch color variation.
- Non-migrating, non-bleeding; chemically inert.
Application Areas
Building Materials (Colored Concrete, Roof Tiles, Artificial Marble)Coatings (Rust-inhibitive primers, industrial coatings, powder coatings)Plastic (colored plastic, color masterbatch)Rubber (various rubber products)Ceramic Enamel (Colored)
App Data
| Applicable Systems | Recommendation | Behavior Description |
|---|---|---|
| Application System | Recommendation | Usage and Performance Details |
| Concrete/Building Materials | ✅ Recommended | Usage: 1-5%, rich color with excellent weather resistance |
| Rust-inhibiting Primer / Industrial Coatings | ✅ Recommended | Use 10-25% for rust prevention and UV resistance. |
| Industrial/Powder Coatings | ✅ Recommended | Usage: 5-20%, Temperature resistance: 800-900°C |
| Plastic/Color Masterbatch | ✅ Recommended | Use 1-5%, excellent coverage |
| Rubber Products | ✅ Recommended | Use 2-5% without affecting vulcanization or reinforcement. |
| Strong acid environment | ⚠️ Use with Caution | Dissolve in concentrated acid; avoid strong acid systems. |
Notes
- Please test with a sample first to confirm the optimal dosage and heat resistance conditions.
- The powder color chart may differ from the final product color. Please refer to the actual colored result.
- Evaluate weather resistance for long-term outdoor exposure.
- This product dissolves in strong acids such as concentrated hydrochloric acid. Use with caution in acidic environments.
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