Pigment index number: C.I. Pigment Yellow 42 (77492), CAS: 51274-00-1, molecular formula \ (\ boldsymbol {\ alpha FeOOH} \) (also written as \ (\ boldsymbol {Fe2O3 · H2O} \), monohydrate iron oxide), belongs to inorganic iron oxide pigments, mainstream models on the market: 313, 910, 920 * *, of which 313 is the universal standard grade Hunan Sanhuan Yan .

1、 Basic physical and chemical indicators

-Appearance: Lemon yellow to earthy yellow fine powder, needle shaped crystal particles

-Iron oxide content: ≥ 86%

-Moisture content: ≤ 1.0%

-Water soluble substance: ≤ 0.3%

-325 mesh sieve residue: ≤ 0.3%

-Oil absorption: 25-35g/100g

-PH value: 3.0-7.0

-Solubility: insoluble in water, alcohol, and various organic solvents; Soluble in strong and concentrated acids

-Thermal characteristics: above 150 ℃, crystal water is lost and gradually dehydrated to transform into iron oxide red, making it unsuitable for long-term high-temperature processing scenarios above 150 ℃

2、 Core performance characteristics

1. Strong covering power, high coloring power, soft and natural color tone, UV resistant, not easy to fade outdoors

2. Light resistant and weather resistant top-level (level 8), excellent alkali resistance, weak acid resistance, solvent resistance, no migration, no color bleeding, very suitable for outdoor products

3. The chemical properties are stable, non-toxic, and low in heavy metals, which can meet the environmental requirements of RoHS and REACH

4. Good dispersibility, suitable for various water-based and solvent based systems, and the powder is easy to grind and disperse

5. High cost-effectiveness, compared to organic yellow pigments, outdoor aging resistance advantages are obvious

3、 Main application areas

1. Building material coloring (maximum application): Colored permeable bricks, colored tiles, terrazzo, artificial marble, precast concrete parts, flooring, directly mixed into cement for coloring, alkali resistant and non fading

2. Coatings and colorants: latex paint for interior and exterior walls, powder coating, alkyd paint, epoxy paint, anti-corrosion paint, water-based industrial colorants, art pigments

3. Plastic, rubber, masterbatch: PVC, PE, PP, rubber products coloring, note: processing temperature should not exceed 150 ℃

4. Other industries: ink, paper, leather coating, cultural and educational supplies, ceramic body coloring