Tetramethylammonium Sulfate: Properties, Uses & Lab Guide

Tetramethylammonium sulfate is a simple ionic compound composed of a quaternary ammonium cation and a sulfate anion, valued in research for its potential as a surfactant and as a convenient source of sulfate ions.

Chemical Class

Quaternary ammonium salt (ionic compound)

Cation

Tetramethylammonium (N(CH₃)₄⁺)

Anion

Sulfate (SO₄²⁻)

Primary Research Use

Surfactant and sulfate anion source in biochemical and chemical assays

Biological Activity

Quaternary amine component may permeate cell membranes, potentially leading to cell death

SKU

T122412

Chemical Identity and Properties

Tetramethylammonium sulfate is a simple ionic compound consisting of two tetramethylammonium cations (N(CH₃)₄⁺) paired with one divalent sulfate anion (SO₄²⁻). As a member of the quaternary ammonium salt family, it carries a permanent positive charge on the nitrogen atom, which is fully substituted with four methyl groups and bears no exchangeable proton. This structural feature distinguishes quaternary ammonium compounds from primary, secondary, and tertiary amines and confers high water solubility and ionic character. The compound is stable under standard laboratory storage conditions and can serve as a well-defined, stoichiometric source of sulfate anions in aqueous systems.

Research Applications

Tetramethylammonium sulfate finds utility in two principal research contexts: as a surfactant and as a sulfate ion source.

Surfactant Applications: Quaternary ammonium compounds are well-established cationic surfactants. Their amphiphilic character enables them to interact with biological membranes and charged surfaces. Tetramethylammonium sulfate may be employed in formulations requiring a cationic surfactant component, including surface modification studies and membrane interaction experiments.

Sulfate Anion Source: In synthetic chemistry and analytical assays requiring a defined concentration of sulfate ions, tetramethylammonium sulfate provides a highly soluble, non-interfering counterion relative to some metal sulfate salts. This can be advantageous when metal cations would otherwise complicate the experimental system.

Biological Studies: The quaternary amine moiety is reported to permeate cell membranes, which can alter membrane characteristics and ultimately lead to cell death. This property makes tetramethylammonium sulfate a candidate reagent for antimicrobial and membrane-disruption research.

Safe Handling and Storage Guidelines

As with all quaternary ammonium compounds, appropriate precautions should be observed when handling tetramethylammonium sulfate in the laboratory:

• Personal Protective Equipment (PPE): Wear chemical-resistant gloves, safety goggles, and a laboratory coat when weighing or preparing solutions of this compound.
• Ventilation: Conduct all handling in a well-ventilated area or under a fume hood, particularly when working with fine powders that may generate dust.
• Storage: Store in a tightly sealed container in a cool, dry environment away from incompatible materials. Follow the specific storage conditions stated on the product label and Safety Data Sheet (SDS).
• Disposal: Dispose of waste material in accordance with local, regional, and national regulations governing quaternary ammonium compounds.
• SDS Review: Always consult the current Safety Data Sheet provided by Aladdin Scientific before use.

Given the reported ability of quaternary amines to interact with cell membranes, avoid skin and eye contact and minimize inhalation exposure.

Preparation of Aqueous Solutions

Tetramethylammonium sulfate is an ionic compound with good water solubility, making it straightforward to prepare stock solutions for laboratory use. Follow these general steps:

1. Determine the required concentration and volume of your working solution before beginning.
2. Weigh the appropriate mass of tetramethylammonium sulfate using a calibrated analytical balance. Use a closed weighing vessel to minimize dust exposure.
3. Dissolve in high-purity water (e.g., HPLC-grade or Milli-Q water) with gentle stirring or vortexing. The compound should dissolve readily at room temperature.
4. Adjust pH if required by your experimental protocol, using appropriate acid or base. Note that the sulfate anion can act as a weak base in solution.
5. Bring to final volume using a calibrated volumetric flask for accurate concentration.
6. Filter if necessary through a 0.2 µm membrane filter for sterile or particulate-free applications.
7. Label and store the prepared solution in a sealed container at the temperature specified by your protocol.

Always verify the actual concentration by an appropriate analytical method when precision is critical.

Quality, Purity, and Ordering Information

Aladdin Scientific supplies tetramethylammonium sulfate (SKU: T122412) as a research-grade reagent. When selecting a lot for sensitive experiments, consider the following:

• Purity: Review the certificate of analysis (CoA) for the specific lot number to confirm purity and the absence of critical impurities relevant to your application. Lot-specific CoAs are available on request.
• Appearance: Tetramethylammonium sulfate is typically a white crystalline solid. Any discoloration or unusual odor should be noted and reported.
• Compatibility: Confirm that the grade and purity meet the requirements of your specific assay or protocol before use.
• Regulatory: This product is intended for research use only and is not approved for diagnostic, therapeutic, or food-use applications.

For ordering, technical inquiries, or to request a Safety Data Sheet, contact Aladdin Scientific through the official website or your regional representative.

Frequently asked questions

What is tetramethylammonium sulfate used for in research?

Tetramethylammonium sulfate serves primarily as a cationic surfactant and as a soluble source of sulfate anions in biochemical and chemical assays. Its quaternary amine component is also of interest in studies of cell membrane permeation and antimicrobial activity.

How does tetramethylammonium sulfate interact with cell membranes?

Quaternary ammonium compounds, including the tetramethylammonium cation, are believed to permeate cell membranes, leading to changes in membrane characteristics that can ultimately result in cell death. The precise molecular mechanism may vary depending on the cell type and concentration used.

What precautions should I take when handling tetramethylammonium sulfate in the lab?

Always wear appropriate PPE including chemical-resistant gloves, safety goggles, and a lab coat. Handle the compound in a well-ventilated area or fume hood to avoid dust inhalation. Consult the Safety Data Sheet (SDS) provided by Aladdin Scientific for full hazard information before use.

Is tetramethylammonium sulfate the same as tetramethylammonium chloride?

No, they are different salts. Both share the tetramethylammonium cation but differ in their anions—sulfate (SO₄²⁻) versus chloride (Cl⁻). This distinction affects their ionic strength contribution, solubility behaviour, and suitability for specific applications such as PCR enhancement or ion-pairing chromatography.

Where can I obtain the Safety Data Sheet and Certificate of Analysis for T122412?

The Safety Data Sheet (SDS) and lot-specific Certificate of Analysis (CoA) for tetramethylammonium sulfate (SKU: T122412) are available through the Aladdin Scientific official website or by contacting your regional Aladdin Scientific representative directly.

References

1. Aladdin Scientific product description for Tetramethylammonium sulfate (SKU: T122412). Aladdin Scientific internal product documentation.
2. General reference on quaternary ammonium compounds as cationic surfactants and their biological membrane interactions. Textbook-level knowledge; specific citation needed.

Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.