UL Prospector

Synoxyl® HSS

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  • INCI Name:

    Trimethoxybenzylidene Pentanedione

Sytheon makes their documentation available in the regions indicated below:

Synoxyl® HSS is a solution to make Hawaii-compliant sunscreens. Synoxyl® HSS is a photostabilizer and SPF booster. It is an excellent photostabiliser for Avobenzone, and it functions as a triplet state quencher. It provides in-vivo SPF boosting by 50% for both organic and inorganic sunscreens when alone it has no contribution to SPF. Environment-friendly solution.

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Retailer Compliance Status

Name (CAS Number)
3-(3,4,5-Trimethoxy benzylidene)-2,4-pentanedione (945558-97-4) Sign in to view

Regulatory & Advisory Status

Name (CAS Number)
3-(3,4,5-Trimethoxy benzylidene)-2,4-pentanedione (945558-97-4)
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Compliance information powered by UL's ChemADVISOR™ Regulatory Database.


Sytheon is an innovative research-based company committed to developing high-performance active ingredients for the cosmetic industry. Either synthetic or natural, always inspired by nature, Sytheon active ingredients are scientifically and clinically validated. In line with their top ingredient Sytenol® A (Bakuchiol), Sytheon offers other unequaled actives in the fields of problem skin (acne & hyperpigmentation), skin aging, sun protection, and skin hydration.

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