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Merck
CN

44570

Dowtherm® A

eutectic mixture of 26.5% diphenyl + 73.5% diphenyl oxide

Synonym(s):

Diphyl

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About This Item

NACRES:
NA.22
PubChem Substance ID:
57650233
UNSPSC Code:
12352100
MDL number:
MFCD00148859

Key Documents

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Product Name

Dowtherm® A, eutectic mixture of 26.5% diphenyl + 73.5% diphenyl oxide

InChI

1S/C12H10O.C12H10/c1-3-7-11(8-4-1)13-12-9-5-2-6-10-12;1-3-7-11(8-4-1)12-9-5-2-6-10-12/h1-10H;1-10H

SMILES string

c1ccc(cc1)-c2ccccc2.O(c3ccccc3)c4ccccc4

InChI key

MHCVCKDNQYMGEX-UHFFFAOYSA-N

refractive index

n20/D 1.590

mp

12-14 °C (lit.)

functional group

phenoxy
phenyl

Quality Level

100

Related Categories

Application

Dowtherm® A can be used as a high boiling solvent in cyclization reactions. For example, it is used to synthesize:      
  • 1-Hydroxy-5-methoxy-1,2-dihydrobenzo[f][2,7]naphthyridines from 2-chloro-3-formyl quinolines.     
  • Isoindolinone derivatives via intramolecular Diels–Alder cycloaddition reactions of substituted pyridazines.
  • Phosphorylated azaheterocycles from 2-diethoxyphosphoryl-3-methoxyacrylate via intramolecular cyclizations under thermal conditions.

General description

Dowtherm® A is a thermally stable organic heat transfer fluid composed of a eutectic mixture of highly stable compounds, biphenyl, and diphenyl oxide. Dowtherm® A is suitable for high-temperature heat transfer applications up to 400 °C. This fluid can be used in both liquid and vapor phase systems.

Legal Information

DOWTHERM is a registered trademark of The Dow Chemical Company or an affiliated company of Dow

pictograms

Exclamation markEnvironment
GHS07,GHS09

signalword

Warning

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1 - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

10 - Combustible liquids

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

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Certificates of Analysis (COA)

Lot/Batch Number
BCCN2579
BCCK1789
BCCG1348
BCCC0745
BCBZ6475

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Thermal neutron cross sections and diffusion parameters of diphenyl and Dowtherm-A using a synthetic scattering function.
Florido PC, et al.
Journal of Nuclear Materials, 185(1), 114-122 (1999)
An experimental study of small-diameter wickless heat pipes operating in the temperature range 200 C to 450 C.
Jouhara H and Robinson AJ.
Heat Transfer Engineering, 30(13), 1041-1048 (2009)
Hongwei Yao et al.
Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases, 20(1), 5-9 (2003-12-26)
To study injury of liver and kidney among the workers exposed to terephthalic acid(TPA), ethylene glycol(EG) and(or) dowtherm A(DOW), and research for early biological monitoring indexes. By using the method of occupational epidemiology, an investigation of industrial hygiene in a
F O Dorgelo et al.
International archives of occupational and environmental health, 56(2), 129-134 (1985-01-01)
A study was carried out in a nylon producing plant to determine exposure to Dowtherm A from frequently occurring leaks in the heating system. The daily exposure to both diphenyl and diphenylether of 20 workers was determined over seven consecutive
[2 cases of acute dinil poisoning].
A N Kapustina et al.
Gigiena truda i professional'nye zabolevaniia, (3)(3), 50-51 (1983-03-01)
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