Diphenyl Oxide, also known as Diphenyl Ether, CAS# 101-84-8, is a classic aromatic ingredient in perfumery with a distinctive floral–soapy, clean odor, slightly green with a subtle metallic nuance. The overall impression is of cool, bright flowers, evoking premium soap, freshly washed fabric, and newly laundered clothes. Thanks to its strong odor intensity and high diffusion, Diphenyl Oxide is usually used at low dosages yet still delivers a very clear effect in the formula.
In fine fragrance creation, Diphenyl Oxide is one of the key “backbone” materials of muguet (lily-of-the-valley) accords, and it also supports white floral and rose–jasmine structures remarkably well. It brightens the overall composition, enhances cleanliness and crisp modernity, and extends the longevity of floral notes in the heart of the fragrance. Combined with muguet, green, and aldehydic materials, Diphenyl Oxide helps build clean, fresh, characterful floral accords for fine fragrances, body mists, and hair mists.
Beyond perfumery, Diphenyl Oxide is highly valued in home care and personal care products such as shampoos, shower gels, hand washes, laundry detergents, fabric softeners, floor cleaners, dishwashing liquids, and various alkaline cleaners. With its high boiling point and excellent stability to heat, alkali, and oxidizing agents, it maintains its odor profile well under harsh manufacturing and usage conditions, helping the fragrance remain “foam-stable” and last longer on fabric and on skin.
Diphenyl Oxide is typically a colorless or nearly colorless liquid (it may be slightly viscous at room temperature depending on conditions), and it dissolves well in fragrance oils, blending easily with most essential oils and synthetic aromatics. Because its odor is very strong and highly diffusive, perfumers usually dose it at low levels to avoid overpowering subtler notes, while maximizing its advantages in diffusion, stability, and its characteristic “clean-up” effect on the overall composition.
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