Solvent and active carrier. Functional formulation ingredient with no standalone activity on the skin.
Topical application
CWeak evidence. In vitro data, open-label studies, or expert consensus.
Inert formulation ingredient. Safe, no standalone activity.
Tripropylene Glycol is a propylene glycol trimer. Liquid, odourless, hygroscopic. Used as a solvent for fat-soluble actives, fragrance carrier, and defoamer. Mechanism. A functional component without standalone skin activity. Helps dissolve and stabilise other actives in the aqueous phase. Where applied. Creams, lotions, deodorants, hair products. Use levels in finished formulas: 0.1-3%. Less common in leave-on cosmetics since the 2010s, when some brands replaced propylene glycol over 'PG-free' marketing. Evidence base. Functional ingredient with no specific RCTs. CIR confirmed the safety of the whole propylene-glycol and trimer family in 2010. Safety. Sensitises no more often than monomer propylene glycol (a contact allergen in 2-3% of the population per NACDG 2018). Patients with PG reactions may show cross-reactivity – patch testing is required. Pregnancy and lactation – safe. Usable without restrictions.
Irritation potential
LowAllergen risk
LowPregnancy
SafeThe Evigrade extension adds an evidence panel to Wildberries, Goldapple, Letu, iHerb, Sephora and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
Tripropylene Glycol is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
Solvent and active carrier.
The INCI name is Tripropylene Glycol. It may also appear as: Трипропиленгликоль.
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