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MilliporeSigma

294136

Sigma-Aldrich

Tetraoctylammonium bromide

98%, solid

Synonym(s):

TOAB

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5 G
$40.00
25 G
$128.00

About This Item

Linear Formula:
[CH3(CH2)7]4N(Br)
CAS Number:
Molecular Weight:
546.79
Beilstein/REAXYS Number:
4169176
EC Number:
MDL number:
UNSPSC Code:
12352107
PubChem Substance ID:
NACRES:
NA.22

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$40.00


Estimated to ship onJuly 09, 2025Details


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Product Name

Tetraoctylammonium bromide, 98%

Quality Level

assay

98%

form

solid

mp

95-98 °C (lit.)

SMILES string

[Br-].CCCCCCCC[N+](CCCCCCCC)(CCCCCCCC)CCCCCCCC

InChI

1S/C32H68N.BrH/c1-5-9-13-17-21-25-29-33(30-26-22-18-14-10-6-2,31-27-23-19-15-11-7-3)32-28-24-20-16-12-8-4;/h5-32H2,1-4H3;1H/q+1;/p-1

InChI key

QBVXKDJEZKEASM-UHFFFAOYSA-M

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This Item
42628886857140023
assay

98%

assay

≥98.0%

assay

≥99.0% (AT)

assay

98%

form

solid

form

solid

form

crystals

form

crystalline

Quality Level

200

Quality Level

200

Quality Level

100

Quality Level

200

mp

95-98 °C (lit.)

mp

102-106 °C (lit.)

mp

102-106 °C (lit.)

mp

285 °C (dec.) (lit.)

General description

Tetraoctylammonium bromide is an organic surface coating agent commonly used to control the size and shape during nanoparticle synthesis.[1]

Application

Tetraoctylammonium bromide (TOAB) has been used as a phase transfer agent to transfer gold tetrachloroaurate from aqueous phase to organic phase in a two-phase (organic-aqueous) method of alkanethiol stabilized gold nanoparticle synthesis.[2] It is also used to prepare TOAB-capped gold nanoparticles, which shows well-defined plasmon absorption compared to thiol-capped nanoparticles.[3]

pictograms

Corrosion

signalword

Danger

hcodes

Hazard Classifications

Eye Dam. 1 - Skin Irrit. 2

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

213.8 °F - closed cup

flash_point_c

101 °C - closed cup

ppe

dust mask type N95 (US), Eyeshields, Gloves


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Questions

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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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