Methyltrioctylammonium bromide

Catalog Number	ACM35675800
CAS	35675-80-0
Structure
Synonyms	Trioctylmethylammonium bromide
IUPAC Name	Methyl(trioctyl)azanium;bromide
Molecular Weight	448.62
Molecular Formula	C25H54BrN
Canonical SMILES	CCCCCCCC[N+](C)(CCCCCCCC)CCCCCCCC.[Br-]
InChI	InChI=1S/C25H54N.BrH/c1-5-8-11-14-17-20-23-26(4,24-21-18-15-12-9-6-2)25-22-19-16-13-10-7-3;/h5-25H2,1-4H3;1H/q+1;/p-1
InChI Key	QLPMKRZYJPNIRP-UHFFFAOYSA-M
Melting Point	37-40 °C
Purity	99%
Appearance	Yellow paste
Storage	Inert atmosphere, Room Temperature
Complexity	220
Covalently-Bonded Unit Count	2
Defined Atom Stereocenter Count	0
Exact Mass	447.34396
Heavy Atom Count	27
Hydrogen Bond Acceptor Count	1
Hydrogen Bond Donor Count	0
Monoisotopic Mass	447.34396
Physical State	White to light yellow paste
Rotatable Bond Count	21
Topological Polar Surface Area	0 Ų

Knowledge & Learning Case Study Q&A

Methyltrioctylammonium Bromide in Dye Extraction from Textile Effluents

Martínez-Rico O, et al. Microchemical Journal, 2024, 196, 109600.

Methyltrioctylammonium bromide is a key component in deep eutectic solvents (DESs) used for the extraction of various dyes from textile effluents. This study investigates its effectiveness in removing different classes of dyes-acid, direct, and reactive-from aqueous solutions, as well as its performance in synthetic industrial effluents. Methyltrioctylammonium bromide-based DESs offer an effective, environmentally friendly solution for extracting dyes from textile wastewater.
Materials and Methods
The study utilized four DESs combining methyltrioctylammonium salts (bromide and chloride) as hydrogen bond acceptors (HBAs) with octanoic and decanoic acids as hydrogen bond donors (HBDs). The specific DESs examined were N1888Br (1:2), N1888Br (1:2), N1888Cl (1:2), and N1888Cl (1:2). Two synthetic effluents were prepared: one containing individual dyes and another with industrial dye mixtures, along with two auxiliary agents common in textile processing-Sarabid DLC (a dye leveler) and Biavin BPA (a crease-prevention agent).
Results
The methyltrioctylammonium-based DESs demonstrated high extraction efficiencies, with the lowest efficiency recorded at 92%, which still resulted in complete decolorization. These solvents were effective across all dye classes and chromophore groups tested, including acid, direct, and reactive dyes, and also worked well with industrial dye mixtures. The presence of auxiliary agents generally did not impede the extraction process, except for a binding agent used in a separate stage of textile processing.

Methyltrioctylammonium Bromide Used in Liquid-Liquid Microextraction

Ahmadi R, et al. Microchemical Journal, 2019, 145, 501-507.

Methyltrioctylammonium bromide (MTOAB) is a quaternary ammonium compound that plays a significant role as a hydrogen bond acceptor (HBA) in the synthesis of hydrophobic deep eutectic solvents (DESs). This study focuses on the application of MTOAB in the spectrophotometric determination of methylene blue (MB) using a shaker-assisted liquid-liquid microextraction combined with back-extraction (SALLME-BE) technique.
DES Preparation
The hydrophobic DES was synthesized by mixing decanoic acid, serving as the hydrogen bond donor (HBD), with MTOAB in a mole ratio of 2:1. The mixture was heated at 35°C under continuous stirring until a transparent, homogeneous yellowish liquid was formed. This DES demonstrated effective extraction properties, crucial for isolating MB from complex aqueous environments.
SALLME-BE Procedure
The SALLME-BE method involved two main steps:
Extraction Process: A 10 mL MB solution containing 0.5 M NaOH was prepared in a centrifuge tube. 40 μL of the hydrophobic DES was added as the extraction solvent. The mixture was shaken at 700 rpm for 2 minutes. After centrifugation at 3900 rpm for 2 minutes, the DES accumulated on the surface as a separate layer. The DES, containing the extracted MB, was adsorbed to the tube wall and later collected by further centrifugation.
Back-Extraction Process: A stripping phase, composed of 70 μL of 2 M HCl solution mixed with ethanol in a 50:20 volume ratio, was added to the DES containing MB.
This mixture was again shaken and centrifuged, leading to the separation of the phases. The aqueous phase was then used for spectrophotometric measurement of MB, showing a maximum absorption wavelength (λmax) of 665 nm.

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