7-Amino-alpha-tetralone: Handling, Storage & Use Protocol

7-Amino-alpha-tetralone is a bicyclic aromatic amine building block widely employed in medicinal chemistry and organic synthesis, requiring careful handling, appropriate solvent selection, and controlled storage conditions to maintain reagent integrity and researcher safety.

Chemical Name

7-Amino-alpha-tetralone (7-amino-3,4-dihydronaphthalen-1(2H)-one)

CAS Number

29174-03-6

Molecular Formula

C₁₀H₁₁NO

Molecular Weight

161.20 g/mol

Appearance

Solid (powder or crystalline)

Recommended Storage

Store at 2–8 °C, protected from light and moisture

Aladdin SKU

A182867

Safety Precautions and Personal Protective Equipment

7-Amino-alpha-tetralone contains a primary aromatic amine functional group. Aromatic amines as a class may pose potential sensitization or toxicity risks; therefore, appropriate precautions must be taken before handling this compound.

• PPE: Wear nitrile gloves, a laboratory coat, and safety goggles at all times when handling the compound.
• Ventilation: Work in a well-ventilated fume hood to minimize inhalation of dust or vapors.
• Skin and Eye Contact: Avoid direct contact. In the event of skin or eye exposure, flush thoroughly with copious amounts of water for at least 15 minutes and seek medical advice.
• Disposal: Dispose of waste material in accordance with local institutional and regulatory guidelines for aromatic amine-containing compounds.

Note: Always consult the Safety Data Sheet (SDS) for A182867 before use. Flag for review: specific GHS hazard classifications should be confirmed against the current SDS.

Solution Preparation and Solvent Compatibility

Proper dissolution of 7-Amino-alpha-tetralone is essential for reproducible experimental results. Follow the steps below to prepare stock and working solutions.

1. Equilibrate to room temperature: Allow the sealed vial to warm to room temperature before opening to prevent condensation and moisture uptake.
2. Weigh accurately: Tare a clean, dry microcentrifuge tube or weighing vessel. Transfer the required amount of compound using a spatula, avoiding prolonged exposure to air.
3. Select an appropriate solvent: 7-Amino-alpha-tetralone is expected to be soluble in common organic solvents such as dimethyl sulfoxide (DMSO), ethanol, methanol, and dichloromethane. Solubility in aqueous buffers alone is expected to be limited due to the lipophilic bicyclic scaffold. For biological assays requiring aqueous media, prepare a concentrated stock in DMSO (e.g., 10–100 mM) and dilute into buffer; ensure the final DMSO concentration is compatible with the biological system (typically ≤0.1–1%).
4. Vortex and sonicate: Mix the solution by vortexing and, if necessary, briefly sonicate in a water bath until complete dissolution is observed.
5. Filtration: If particulates remain, filter through a 0.2 µm PTFE syringe filter before use.

Flag for review: Specific solubility values (mg/mL) for A182867 have not been confirmed from the source material and should be verified experimentally or against the product specification sheet.

Storage and Stability Guidelines

Maintaining the chemical integrity of 7-Amino-alpha-tetralone requires adherence to appropriate storage conditions.

• Temperature: Store the bulk solid at 2–8 °C in a refrigerator dedicated to chemical storage.
• Light protection: Keep the compound in amber vials or wrapped in aluminum foil, as aromatic amines can be susceptible to photo-oxidation.
• Moisture control: Store under an inert atmosphere (nitrogen or argon) or with a desiccant (e.g., silica gel) to prevent hydrolysis or oxidation of the amine group.
• Prepared solutions: Stock solutions in DMSO may be aliquoted and stored at −20 °C to minimize freeze-thaw cycles. Avoid repeated freeze-thaw of the same aliquot.
• Shelf life: Consult the Certificate of Analysis (CoA) supplied with product A182867 for the confirmed expiry date. Visually inspect the material before each use; discoloration may indicate degradation.

Flag for review: Specific stability data and confirmed shelf-life duration for A182867 should be sourced from the CoA or technical data sheet.

Application Notes and Use in Synthesis

7-Amino-alpha-tetralone (7-amino-3,4-dihydronaphthalen-1(2H)-one) is a versatile bicyclic building block combining a tetralone (benzocyclohexanone) scaffold with a primary aromatic amine. This dual functionality makes it valuable in multiple research contexts:

• Medicinal chemistry: The aminotetralone scaffold is present in or serves as a precursor to pharmacologically active compounds. The aromatic amine enables acylation, sulfonylation, reductive amination, and coupling reactions to generate amide, sulfonamide, urea, and imine derivatives.
• Heterocyclic synthesis: The amine and adjacent carbonyl (ketone) groups can be exploited to form condensed heterocycles such as benzimidazoles, quinolines, and related ring systems via cyclization reactions.
• Fluorescent probe development: Aminotetralone cores have been explored in the design of fluorescent probes and dyes, leveraging the push-pull electronic character of the amine-substituted aromatic ketone.
• Structure-activity relationship (SAR) studies: As a rigid, chiral-capable scaffold, it is used in SAR campaigns targeting CNS and other receptor classes.

Flag for review: Specific literature examples citing A182867 or CAS 29174-03-6 in published pharmacological studies should be confirmed and cited with verified DOIs/PMIDs.

Quality Control and Verification Before Use

Before commencing experiments with 7-Amino-alpha-tetralone (A182867), researchers should perform the following quality checks to ensure compound identity and purity:

1. Review the Certificate of Analysis (CoA): Confirm the lot-specific purity (typically reported by HPLC or GC), identity (confirmed by NMR or MS), and expiry date. Download the CoA directly from the Aladdin Scientific product page for A182867.
2. Visual inspection: The compound should appear as a uniform solid. Clumping, discoloration, or unusual odor may indicate degradation or improper storage.
3. TLC or HPLC check: For critical applications, run a quick TLC using an appropriate mobile phase (e.g., EtOAc/hexane) or an HPLC purity check against a reference standard to confirm compound integrity prior to use.
4. NMR verification: If identity confirmation is required, acquire a ¹H NMR spectrum in a deuterated solvent (e.g., DMSO-d₆ or CDCl₃) and compare with the reported spectrum or the CoA data.
5. Weigh under inert atmosphere if hygroscopic behavior is suspected: If the material shows signs of moisture uptake, dry under vacuum over P₂O₅ or molecular sieves before accurate weighing.

Flag for review: Specific CoA purity thresholds and NMR reference data for A182867 should be drawn from the official Aladdin product documentation.

Frequently asked questions

What solvents are recommended for dissolving 7-Amino-alpha-tetralone?

7-Amino-alpha-tetralone is expected to dissolve well in polar organic solvents such as DMSO, ethanol, methanol, and dichloromethane. For aqueous biological assays, prepare a concentrated DMSO stock solution and dilute into the aqueous medium, keeping the final DMSO concentration below 1% where possible. Specific solubility values should be verified against the product data sheet or by experimental determination.

How should 7-Amino-alpha-tetralone (A182867) be stored to maintain stability?

Store the solid compound at 2–8 °C, protected from light and moisture, preferably under an inert atmosphere of nitrogen or argon. Prepared stock solutions in DMSO should be aliquoted and stored at −20 °C to minimize freeze-thaw cycling. Always check the Certificate of Analysis for the lot-specific expiry date.

What are the main research applications of 7-Amino-alpha-tetralone?

7-Amino-alpha-tetralone is primarily used as a building block in medicinal chemistry and organic synthesis. Its aromatic amine group enables diverse coupling reactions (acylation, sulfonylation, reductive amination), and the bicyclic scaffold is used in heterocyclic ring-forming reactions and structure-activity relationship studies. It has also been explored in fluorescent probe development.

Is 7-Amino-alpha-tetralone hazardous, and what PPE is required?

As an aromatic amine, 7-Amino-alpha-tetralone should be handled with caution due to the potential sensitization or toxicity associated with this chemical class. Wear nitrile gloves, a laboratory coat, and safety goggles, and work in a fume hood. Consult the current SDS for A182867 for precise GHS hazard classifications and first-aid measures.

How can I confirm the identity and purity of A182867 before use?

Review the lot-specific Certificate of Analysis (CoA) available on the Aladdin Scientific product page, which reports purity by HPLC or GC and identity by NMR or MS. For additional verification, perform a TLC or HPLC purity check and acquire a ¹H NMR spectrum in DMSO-d₆ or CDCl₃ for comparison with the reference data.

References

1. Aladdin Scientific. Product page and Certificate of Analysis for 7-Amino-alpha-tetralone, SKU A182867. Aladdin Scientific Corp.
2. March, J. Advanced Organic Chemistry: Reactions, Mechanisms, and Structure. 4th ed. Wiley-Interscience, 1992. (General reference for aromatic amine reactivity.)
3. Clayden, J.; Greeves, N.; Warren, S. Organic Chemistry. 2nd ed. Oxford University Press, 2012. (General reference for tetralone and amine chemistry.)

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