Drometrizole Trisiloxane

Product Description

Our high-purity Drometrizole Trisiloxane is supplied as a cosmetic-grade siloxane-linked benzotriazole under ISO-aligned manufacturing with batch COA traceability, offering formulators direct factory pricing and flexible kilogram-to-tonne bulk volumes.

This lipophilic UV absorber targets the UVA window near 320–340 nm and helps photostabilize co-filters such as avobenzone, while the trisiloxane tail enables even dispersion in silicone phases, cyclomethicone serums, and hair UV-protection systems.

Unlike water-soluble UV filters or non-siloxane benzotriazoles, this CosIng-listed photostabilizer suits anhydrous sun sticks, silicone-emulsion SPF, and hair sun-care lines where formulators want HPLC-verified assay and direct factory supply.

Product Specification

• INCI Name: Drometrizole Trisiloxane
• CAS No.: 154702-15-5
• Appearance: Pale yellow to colorless liquid (Typical)
• Solubility: Soluble in silicones and cosmetic oils; insoluble in water (Typical)
• Suggested pH: Stable across typical formulation pH 5–8 (Typical, oil-phase use)
• Assay Method: HPLC UV assay (Typical)
• Shelf Life: 24 months sealed, below 25°C (Typical)
• Standard Packaging: 1 kg / 25 kg
• Storage: Keep sealed, cool, dry, and protected from light (Typical)
• Regulatory Status: Listed in CosIng and EU Annex VI as UV filter; max 15% in ready-to-use products (Typical)
• Quality & Testing: Typical COA covers assay, related substances, and heavy metals
• Compliance Note: For cosmetic use only; observe regional UV filter monograph limits and SPF testing requirements

Key Benefits & Applications

Drometrizole Trisiloxane supports photoprotection, environmental defense, and silicone-compatible UV claims through lipophilic benzotriazole activity suited to SPF and hair sun-care formulators.

• Photo-Aging Protection: Absorbs UVA-range radiation to help defend against photo-induced matrix degradation in daily sunscreen emulsions.
• UV Damage Defense: Provides photoprotective shielding in outdoor-exposed skin care, body SPF, and after-sun defense lines.
• Environmental Photo-Defense: Mitigates UV-linked oxidative stress in pollution-exposed urban day-care and antioxidant SPF systems.
• Siloxane Film Deposition: Deposits a lightweight protective layer in hair UV sprays and anhydrous sun-stick bases.

Formulation Guidelines

Introduce drometrizole trisiloxane in the oil or silicone phase; confirm assay, photostability, and regional UV filter limits before SPF claim validation.

• Suggested use level: 2–10% w/w in sunscreens; 0.5–3% as photostabilizer co-filter (Typical, region-dependent).
• Processing: Add to oil or silicone phase at 25–40°C; pre-blend with cyclopentasiloxane for even dispersion.
• Photostability: Co-formulate with avobenzone or UVA filters; this actives helps reduce photodegradation in SPF emulsions.
• Compatibility: Ideal for silicone emulsions and anhydrous sticks; not suitable for purely aqueous systems without emulsification.
• Regulatory note: EU Annex VI permits up to 15%; final SPF claims require validated sun-protection testing.
• Synergy: Boost UVA photostability by co-loading Avobenzone with drometrizole trisiloxane in silicone SPF emulsions at 2–5% combined.