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144991

Sigma-Aldrich

1,7-Dibromoheptane

97%

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Synonym(s):
Heptamethylene dibromide
Linear Formula:
Br(CH2)7Br
CAS Number:
Molecular Weight:
257.99
Beilstein/REAXYS Number:
1734575
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Quality Level

assay

97%

form

liquid

refractive index

n20/D 1.503 (lit.)

bp

255 °C (lit.)

density

1.51 g/mL at 25 °C (lit.)

SMILES string

BrCCCCCCCBr

InChI

1S/C7H14Br2/c8-6-4-2-1-3-5-7-9/h1-7H2

InChI key

LVWSZGCVEZRFBT-UHFFFAOYSA-N

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1 of 4

This Item
D41007H11807H2201
1,7-Dibromoheptane 97%

144991

1,7-Dibromoheptane

1,6-Dibromohexane 96%

D41007

1,6-Dibromohexane

1,6-Hexanediol 97%

H11807

1,6-Hexanediol

1,7-Heptanediol 95%

H2201

1,7-Heptanediol

Quality Level

100

Quality Level

200

Quality Level

200

Quality Level

100

form

liquid

form

liquid

form

-

form

liquid

refractive index

n20/D 1.503 (lit.)

refractive index

n20/D 1.507 (lit.)

refractive index

-

refractive index

n20/D 1.455 (lit.)

bp

255 °C (lit.)

bp

243 °C (lit.)

bp

250 °C (lit.)

bp

259 °C (lit.)

density

1.51 g/mL at 25 °C (lit.)

density

1.586 g/mL at 25 °C (lit.)

density

-

density

0.951 g/mL at 25 °C (lit.)

Application

1,7-Dibromoheptane was used in the synthesis of random thermotropic liquid crystalline copolyether and ternary copolyether. It was also used in the synthesis of thermotropic liquid crystalline dendrimer exhibiting a nematic phase.

pictograms

Skull and crossbones

signalword

Danger

hcodes

Hazard Classifications

Acute Tox. 2 Oral

Storage Class

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk_germany

WGK 3

flash_point_f

235.4 °F - closed cup

flash_point_c

113 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter


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Functional polymers and sequential copolymers by phase transfer catalysis. 24. The influence of molecular weight on the thermotropic properties of a random copolyether based on 1, 5-dibromopentane, 1, 7-dibromoheptane, and 4, 4'-dihydroxy-a-methylstilbene.
Percec V, et al.
Journal of Polymer Science Part A: Polymer Chemistry, 25(7), 1943-1965 (1987)
Liquid crystalline polyethers based on conformational isomerism. 6. Influence of copolymer composition of a ternary copolyether based on 1-(4-hydroxyphenyl)-2-(2-methyl-4-hydroxyphenyl) ethane, 1, 5-dibromopentane, 1, 7-dibromoheptane, and 1, 9-dibromononane on its mesomorphic phase transitions.
Percec V and Tsuda Y.
Macromolecules, 23(1), 5-12 (1990)
Synthesis and characterization of a thermotropic nematic liquid crystalline dendrimeric polymer.
Percec V and Kawasumi M.
Macromolecules, 25(15), 3843-3850 (1992)
Yuan-Ping Pang et al.
PloS one, 4(2), e4349-e4349 (2009-02-06)
Aphids, among the most destructive insects to world agriculture, are mainly controlled by organophosphate insecticides that disable the catalytic serine residue of acetylcholinesterase (AChE). Because these agents also affect vertebrate AChEs, they are toxic to non-target species including humans and

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