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Diphenyl ether

Diphenyl ether
Diphenyl ether structure
Chemical Name:
Diphenyl ether
FEMA 3667;NSC 19311;AKOS 90362;phenyloxide;Oxydiphenyl;Oxydibenzol;PHENYL ETHER;Phenyl oxide;Oxydibenzene;DIPHENYL OXID
Molecular Formula:
Formula Weight:
MOL File:

Diphenyl ether Properties

Melting point:
26 °C
Boiling point:
259 °C(lit.)
1.073 g/mL at 25 °C(lit.)
vapor density 
>5.86 (25 °C, vs air)
vapor pressure 
<1 mm Hg ( 20 °C)
refractive index 
n20/D 1.579(lit.)
Flash point:
>230 °F
storage temp. 
alcohol: soluble(lit.)
Specific Gravity
Relative polarity
Weak geranium.
Odor Threshold
explosive limit
Water Solubility 
JECFA Number
Henry's Law Constant
2.13 at 20 °C (approximate - calculated from water solubility and vapor pressure)
Exposure limits
NIOSH REL: TWA 1 ppm (7 mg/m3), IDLH 100 ppm; OSHA PEL: TWA 1 ppm; ACGIH TLV: TWA 0.1, STEL 2 ppm (adopted).
CAS DataBase Reference
101-84-8(CAS DataBase Reference)
Substances Added to Food (formerly EAFUS)
EWG's Food Scores
NIST Chemistry Reference
Diphenyl ether(101-84-8)
EPA Substance Registry System
Phenyl ether (101-84-8)
  • Risk and Safety Statements
Signal word  Danger
Hazard statements  H303-H401-H319-H411-H225-H301+H311+H331-H370
Precautionary statements  P305+P351+P338-P210-P260-P280-P301+P310+P330-P308+P311-P403+P233-P273-P264-P280i-P337+P313
Hazard Codes  N,Xi,T
Risk Statements  51/53-36/37/38-39/23/24/25-23/24/25-36/38-36
Safety Statements  60-61-57-37/39-26-45-36/37
RIDADR  UN 3077 9/PG 3
WGK Germany  2
RTECS  KN8970000
Autoignition Temperature 610 °C
HS Code  2909 30 10
HazardClass  9
PackingGroup  III
Toxicity LD50 orally in Rabbit: 2450 mg/kg LD50 dermal Rabbit > 7940 mg/kg
NFPA 704
1 0

Diphenyl ether price More Price(19)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 240834 Diphenyl ether ReagentPlus , ≥99% 101-84-8 5g $30.3 2019-12-02 Buy
Sigma-Aldrich 240834 Diphenyl ether ReagentPlus , ≥99% 101-84-8 100g $61.5 2019-12-02 Buy
TCI Chemical P0177 Phenyl Ether >99.0%(GC) 101-84-8 25g $14 2020-06-24 Buy
TCI Chemical P0177 Phenyl Ether >99.0%(GC) 101-84-8 500g $22 2020-06-24 Buy
Alfa Aesar A15791 Diphenyl ether, 99% 101-84-8 500g $26.2 2020-06-24 Buy

Diphenyl ether Chemical Properties,Uses,Production


Diphenyl ether (diphenyl oxide) is a colorless liquid with a floral odor. It is a white, crystalline solid at temperatures below 80ºF (27ºC). It has low volatility, low solubility in water, and is stable at high temperatures. Avoid contact with oxidizing materials.
Liquid diphenyl oxide is used primarily in industry. It is used in the industrial setting as a heat transfer fluid. It is the major component of Dowtherm A® (an eutectic mixture of phenyl ether and biphenyl) and further as a chemical intermediate in the production of surface-active agents and hightemperature lubricants, and in perfumery due to its geranium-like odour (ACG99b). It is also used as a chemical intermediate in the manufacture of surfactants and fire retardants.
Diphenyl oxide (DPO) is manufactured using the direct phenol method.
synthesis of diphenyl ether

Chemical Properties

Diphenyl oxide is a practically colorless crystalline solid with a strong geranium-like odor. clear pale yellowish liquid after melting. It is almost completely insoluble in water, but dissolves in most of the common organic solvents. Its high thermal stability at temperatures as high as 350 to 400°C. together with its noncorrosiveness and general chemical inertness make it eminently suitable as a component of high-boiling heat transfer media.

Chemical Properties

Diphenyl Ether has not been observed in nature. It is a colorless liquid or a crystalline solid (mp 26.8°C) with an odor reminiscent of geranium leaves. Diphenyl ether is obtained as a by-product in the production of phenol by high-pressure hydrolysis of chlorobenzene. Because of its stability and low price, diphenyl ether is used in large quantities in soap perfumes.

Chemical Properties

Diphenyl ether has a harsh, floral-green, metallic geranium-type odor.

Physical properties

Colorless solid or liquid with a geranium-like odor. An experimentally determined odor threshold concentration of 100 ppbv was reported by Leonardos et al. (1969).


Reported found in muscat grapes, grilled beef, green tea, potato chips, buckwheat, Bourbon vanilla and lemon balm.


Phenyl Ether is an Impurity of Propofol (P829750).


Diphenyl ether is widely used as a heat transfer agent and a dye carrier. It can be used alone or as a mixture with other materials. Because of its reactivity, It can also be used as a raw material or chemical intermediate to produce commercial products. Diphenyl ether is used in the production of:
  1. Diphenyl ether is employed as a processing aid in the production of polyesters. It acts as a chemical intermediate in the production of surface active agents and high temperature lubricants, fire retardants like polybrominated diphenyl ethers (PBDEs) and fragrance for detergents.
  2. Heat transfer media – like DOWTHERMTM fluids used for heating industrial processes
  3. Alkylated diphenyl oxides – used to make surfactants, greases and lubricants
  4. Halogenated diphenyl oxides – used in insecticides, wood preservatives, and flame retardants for appliance casings in consumer electronic products
  5. High temperature solvents
  6. Coatings
  7. Textile dye labeling
  8. Plastics – like ethylene-propylene-diene monomer (EPDM) rubber that is used for membrane roofing materials
  9. Diphenyl ether plays a vital role in the Ferrario reaction to produce phenoxathiin, which finds application in polyamide and polyimide production. Involving similar reactions, diphenyl ether is a significant side product in the high-pressure hydrolysis of chlorobenzene in the production of phenol.
  10. Diphenyl ether is found in alcoholic beverages. Diphenyl ether is present in muscat grapes, green tea, vanilla, lemon balm, buckwheat, potato chips and grilled beef. Diphenyl ether is a flavouring ingredient.


ChEBI: An aromatic ether in which the oxygen is attached to two phenyl substituents. It has been found in muscat grapes and vanilla.


By heating potassium phenolate with bromobenzene or with chlorobenzene at elevated temperatures.

Aroma threshold values

Aroma characteristics at 1.0%: grassy, musty, powdery, dry, terpy, ocimenelike, aromatic and hoplike with green juniper berry nuances.

Taste threshold values

Taste characteristics at 10 ppm: dry chemical, floral rosey with carrot, tropical and hoplike terpy notes and a green vegetative and woody nuance.

General Description

Colorless liquid with a mild pleasant odor. May float or sink in water. Freezing point is 81°F.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Diphenyl oxide can react with oxidizing materials. . A vigorous reaction occurred between the ether and chlorosulfuric acid.

Health Hazard

Inhalation may cause nausea because of disagreeable odor. Contact of liquid with eyes causes mild irritation. Prolonged exposure of skin to liquid causes reddening and irritation. Ingestion produces nausea.

Fire Hazard

Diphenyl oxide is combustible.

Chemical Reactivity

Reactivity with Water No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

Safety Profile

Moderately toxic by ingestion. Prolonged exposure damages liver, spleen, kidneys, and thyroid, and upsets gastrointestinal tract. A skin and eye irritant. Combustible when exposed to heat or flame; can react with oxidizing materials. For explosion hazard, see ETHERS. To fight fire, use water, foam, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes

Purification Methods

Crystallise the ether from 90% EtOH. Melt it, wash it with 3M NaOH and water, dry it with CaCl2 and fractionally distil it under reduced pressure. Fractionally recrystallise it from its melt and store over P2O5. [Beilstein 6 IV 562.]

Diphenyl ether Preparation Products And Raw materials

Raw materials

Preparation Products

Diphenyl ether Suppliers

Global( 314)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Dalian Richfortune Chemicals Co., Ltd
86-411-84821380; China 338 57
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 21837 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 22625 55
Shanghai Zheyan Biotech Co., Ltd.
18017610038 CHINA 3623 58
career henan chemical co
+86-371-86658258 CHINA 30043 58
13867897135 CHINA 925 58
+86 18953170293
+86 0531-67809011 CHINA 2995 58
Chemwill Asia Co.,Ltd.
86-21-51861608;;; CHINA 23977 58
Hubei Jusheng Technology Co.,Ltd.
027-59599243 CHINA 28231 58
Haihang Industry Co.,Ltd
+86 531 8582 1093 CHINA 10157 58

View Lastest Price from Diphenyl ether manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2020-07-07 OEM Diphenyl ether
US $1.00 / KG 1KG 99% 100 Ton/Tons per Month Factory supply Phenyl Ether cas no 101-84-8 Hebei Xibaijie Biotechnology Co., Ltd.
2020-07-07 New Diphenyl ether
US $1.00 / KG 1KG 99% 100 Ton/Tons per Month Factory supply Phenyl Ether cas no 101-84-8 Hebei Xibaijie Biotechnology Co., Ltd.
2020-07-08 Diphenyl ether
US $5.00 / ASSAYS 1ASSAYS 99% 100 Ton/Tons per Month Factory supply Phenyl Ether cas no 101-84-8 Hebei Xibaijie Biotechnology Co., Ltd.

Diphenyl ether Spectrum

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