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Chemical structure of Diphenyl Oxide | 101-84-8
CAS: 101-84-8
SKU: S3391
Diphenyl Oxide | SKU: S3391
Synonyms:Diphenyl ether; Phenyl ether; Oxydibenzene; Biphenyl oxide
Chemical structure of Diphenyl Oxide | 101-84-8
Diphenyl Oxide, also known as diphenyl ether or phenyl ether, is a white crystalline aromatic compound with a distinctive geranium-like odor, supplied by Sarchem Labs for synthesis, formulation, and specialty chemical applications. Two benzene rings joined through a central oxygen give it excellent thermal and chemical stability, which is why it’s a long-standing component of high-temperature heat-transfer fluids as well as fragrance and flavor formulations. Every lot ships with a Certificate of Analysis and Safety Data Sheet.
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Specifications

Boiling Point258°C
ColorWhite
Linear Formula(C6H5)2O
Formula Weight170.21
Physical FormCrystal-Lump at 20°C
Chemical Name or MaterialPhenyl Ether
UN Number3077
Molecular FormulaC12H10O
Molecular Weight170.21 g/mol
CAS Number101-84-8
EC Number202-981-2
MDL NumberMFCD00003034
PubChem CID7583
InChIKeyUSIUVYZYUHIAEV-UHFFFAOYSA-N

Applications

High-temperature heat-transfer fluid component (often as a eutectic blend with biphenyl)
Fragrance and flavor fixative (geranium-type odor profile) in perfumery formulation
Chemical synthesis intermediate
Plasticizer and specialty solvent applications
Reference/research compound in aromatic ether chemistry

Product Description

What is Diphenyl Oxide?

Diphenyl Oxide is an aromatic ether formed by linking two phenyl rings through a single oxygen atom (C12H10O). This simple but thermally robust structure gives it a high boiling point (258°C) and strong resistance to thermal and oxidative breakdown, properties that set it apart from many other aromatic solvents and make it useful in demanding high-temperature applications.

Uses of Diphenyl Oxide

Its outstanding thermal stability is why diphenyl oxide (often blended eutectically with biphenyl) has long served as a heat-transfer fluid in industrial process heating systems operating at high temperatures. Separately, its distinctive geranium-like fragrance makes it a valued fixative and note component in perfumery and flavor formulation. It also serves as a chemical synthesis intermediate and specialty solvent in select formulation work.

Safety Information

  • Hazard Statement: H410 (Very toxic to aquatic life with long-lasting effects)
  • Classification: Aquatic Acute 1; Aquatic Chronic 1
  • PPE: Chemical-resistant gloves, safety goggles
  • Handling: Prevent release to waterways given its aquatic toxicity classification; store in a tightly sealed container

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FAQs: Diphenyl Oxide

Mainly as a high-temperature heat-transfer fluid component, a fragrance/flavor fixative in perfumery, and a chemical synthesis intermediate.

Yes — diphenyl oxide and diphenyl ether are the same compound (CAS 101-84-8, C12H10O); "phenyl ether" and "oxydibenzene" are also synonyms for it.

Yes — it's classified H410 (very toxic to aquatic life with long-lasting effects), so it should never be released to drains or waterways and must be disposed of per local environmental regulations.

Molecular weight 170.21 g/mol; boiling point 258°C, consistent with its use in high-temperature heat-transfer applications.

Yes, for every lot (SKU S3391), confirming identity and purity before use.