4-Diethylaminobenzaldehyde
4-Diethylaminobenzaldehyde (CAS 120-21-8) is a chemical compound with the linear formula (C2H5)2NC6H4CHO and a molecular weight of 177.24 g/mol. This aromatic aldehyde is characterised by its diethylamino group attached to the benzene ring. It serves as a valuable building block in organic synthesis, finding utility in the preparation of various chemical intermediates and specialised organic molecules. Available at 99% assay, it is suitable for research and development purposes.

Organic Synthesis Intermediate
Utilised as a key building block in the synthesis of more complex organic molecules. Its reactive aldehyde group and the presence of the diethylamino substituent enable diverse chemical transformations.
Dye and Pigment Precursor
Can serve as a precursor in the synthesis of certain dyes and pigments, leveraging its aromatic structure and functional groups for chromophore development.
Research and Development
Employed in laboratory settings for exploratory chemical research, method development, and the creation of novel compounds within academic and industrial R&D departments.
| Molecular weight | 177.24 |
|---|---|
| Linear formula | (C2H5)2NC6H4CHO |
| Assay | 99% |
| Boiling point | 174 °C/7 mmHg(lit.) |
| Melting point | 37-41 °C(lit.) |

Hazard statements
- H311Toxic in contact with skin
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P312Call a POISON CENTER if you feel unwell
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Flash point | 113 °C / 235.4 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4-Diethylaminobenzaldehyde used for?
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4-Diethylaminobenzaldehyde (CAS 120-21-8) is primarily used as a building block in organic synthesis and as a precursor in the development of dyes and pigments, as well as in research and development laboratories.
What are the CAS number and molecular formula for 4-Diethylaminobenzaldehyde?
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The CAS number is 120-21-8, and its linear formula is (C2H5)2NC6H4CHO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Diethylaminobenzaldehyde with a minimum assay of 99%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade unless explicitly stated in the product documentation. It is supplied for research and industrial use.
How should 4-Diethylaminobenzaldehyde be handled safely?
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Handling requires appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, faceshields, and gloves. Ensure adequate ventilation. Refer to the Safety Data Sheet for comprehensive handling instructions and hazard information, as it is classified as harmful if swallowed, causes skin irritation, causes serious eye irritation, and may cause respiratory irritation.
Is 4-Diethylaminobenzaldehyde a controlled substance?
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Based on the provided data, 4-Diethylaminobenzaldehyde is not listed as a controlled substance.
How is 4-Diethylaminobenzaldehyde packed and shipped?
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Tech Serve Solutions exports chemicals globally. Packaging is designed to maintain product integrity and comply with international shipping regulations. Specific packaging details are available upon request.
How can I request a quote or sample for 4-Diethylaminobenzaldehyde?
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To request a quote or a sample of 4-Diethylaminobenzaldehyde, please contact our sales department through the website or direct inquiry channels, providing your contact details and required quantity.
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