Bismuth Subnitrate

Product Description

Green Stone Swiss supplies high-purity Bismuth Subnitrate (CAS 1304-85-4) through direct factory channels for cosmetic OEM manufacturers formulating pressed powders, loose foundations, and opaque makeup bases.

This inorganic bismuth salt functions as a white opacifying powder with light-scattering properties, improving compact coverage and optical diffusion when dispersed in anhydrous powder and low-water makeup matrices.

Distinct from bismuth oxychloride pearl pigments, subnitrate grades prioritize matte-to-soft-focus opacity and binding support in face powder, setting powder, and mineral foundation applications.

Product Specification

• INCI Name: Bismuth Subnitrate
• CAS No.: 1304-85-4
• Appearance: White to off-white fine powder
• Particle Size: Suggested D50 5–15 µm (Typical)
• Solubility: Insoluble in water and ethanol; soluble in mineral acids
• Suggested pH: Stable in neutral to slightly acidic anhydrous systems (Typical)
• Assay Method: Gravimetric bismuth content; identity by IR (Typical)
• Shelf Life: 36 months sealed, below 25°C (Typical)
• Standard Packaging: 25 kg fiber drum; 1 kg sealed bag
• Storage: Cool, dry, sealed; protect from moisture and acids
• Regulatory Status: Listed in INCI; indexed in CosIng as colorant/opacifying agent
• Quality & Testing: Typical COA: bismuth assay, moisture, heavy metals, microbiology
• Compliance Note: For cosmetic use only; not for oral drug or ingestible applications

Key Benefits & Applications

Bismuth subnitrate delivers formulation-layer opacity, oil control, and compact processing support in anhydrous makeup systems.

• Optical Diffusion Support: Light-scattering particles soften the appearance of texture in face and setting powders.
• Compact Opacity Control: Builds coverage in pressed powder and mineral foundation without heavy chalkiness at 2–8% w/w.
• Oil Absorption Aid: Supports sebum uptake in oil-control compacts and long-wear setting powders.
• Pressed Powder Binding: Improves compact integrity and pay-off when blended with talc or mica bases.
• Pigment Dispersion Stability: Maintains uniform white opacity in loose and pressed anhydrous powder matrices.

Formulation Guidelines

Use in anhydrous or low-water powder systems; avoid strong alkaline co-formulation.

• Recommended use level: 2–8% in face powders; 1–5% in liquid makeup dispersions
• Optimal formula pH: Formulate below pH 8.0; avoid ammonia-heavy alkaline bases
• Processing: Dry-blend with micronized fillers; sieve through 200 mesh before compacting
• Compatibility: Compatible with talc, mica, zinc stearate, and iron oxides; avoid strong chelating acids
• Caution: Do not confuse with bismuth oxychloride pearl pigments; verify INCI on COA
• Synergy: Boost soft-focus texture by adding Silica at 2–5% to bismuth subnitrate in blur finishing powders.