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144991

Sigma-Aldrich

1,7-Dibromoheptane

97%

Synonym(s):

Heptamethylene dibromide

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About This Item

Linear Formula:
Br(CH2)7Br
CAS Number:
4549-31-9
Molecular Weight:
257.99
Beilstein:
1734575
EC Number:
224-910-4
MDL number:
MFCD00000274
UNSPSC Code:
12352100
PubChem Substance ID:
24848695
NACRES:
NA.22

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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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
GHS06

Signal Word

Danger

Hazard Statements

H300

Hazard Classifications

Acute Tox. 2 Oral

Storage Class Code

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

WGK

WGK 3

Flash Point(F)

235.4 °F - closed cup

Flash Point(C)

113 °C - closed cup

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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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)
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)
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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