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Sigma-Aldrich

Dowtherm® A

eutectic mixture of 26.5% diphenyl + 73.5% diphenyl oxide

Synonym(s):

Diphyl

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About This Item

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

Quality Level

100

refractive index

n20/D 1.590

mp

12-14 °C (lit.)

SMILES string

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

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

InChI key

MHCVCKDNQYMGEX-UHFFFAOYSA-N

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.

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.

Legal Information

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

Pictograms

Exclamation markEnvironment
GHS07,GHS09

Signal Word

Warning

Hazard Statements

H315 - H319 - H335 - H410

Hazard Classifications

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

Target Organs

Respiratory system

Storage Class Code

10 - Combustible liquids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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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
V M Sheĭbak et al.
Gigiena i sanitariia, (4)(4), 81-82 (2008-12-23)
Experiments on rats were carried out to study the effect of dinil on the animals on chronic intake of the agent in the quantities exceeding the maximum permissible concentrations by many times. Despite few biochemical changes, there was a certain
[2 cases of acute dinil poisoning].
A N Kapustina et al.
Gigiena truda i professional'nye zabolevaniia, (3)(3), 50-51 (1983-03-01)
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
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)
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