Para-Dimethylaminobenzaldehyde is an aromatic organic compound containing both amine and aldehyde functional groups. It is also known as 4-(dimethylamino) benzaldehyde and is of benzaldehyde class. Its structure contains a dimethylamino group positioned para to the aldehyde group on the aromatic ring. The electron-donating nature of the dimethylamino group contributes to its characteristic reactivity and chromogenic behavior. Para-Dimethylaminobenzaldehyde readily forms colored products through reactions with certain nitrogen containing compounds. It is a key component of Ehrlich’s reagent and Kovac’s reagent for the detection of indoles and can also react with pyrroles and amines to produce characteristic colored derivatives.
CAS No.: 100-10-7
Synonyms: p-Dimethylaminobenzaldehyde, 4-Formyl-N,N-dimethylaniline, N,N-Dimethyl-4-formylaniline, DMAB.
| Physical Properties | |
| Chemical formula | C9H11NO |
| IUPAC Name | 4-(dimethylamino)benzaldehyde |
| Molecular weight | 149.19 g/mol |
| Solubility | Slightly soluble in water |
| Flash Point | 164 °C |
| Appearance | Off-white or pale yellow crystalline powder |
| Storage | Store at room temperature |
| Chemical Properties | |
| Color | Pale Yellow |
| Physical State | Solid |
| Melting Point | 72 -75 °C |
| Boiling Point | 176 °C |
| Odor | Characteristic odor |
| Pictograms : |  |
| Hazard Statements : | H302: Harmful if swallowed. H315: Causes skin irritation. H319: Causes serious eye irritation. |
| Precautionary Statements: | P264: Wash skin thoroughly after handling. P270: Do not eat, drink or smoke when using this product. P280: Wear protective gloves/ eye protection/ face protection. P301 + P312 + P330: IF SWALLOWED: Call a POISON CENTER/ doctor if you feel unwell. Rinse mouth. P337 + P313: If eye irritation persists: Get medical advice/ attention. |
Para-Dimethylaminobenzaldehyde is an aromatic organic compound containing both amine and aldehyde functional groups. It is also known as 4-(dimethylamino) benzaldehyde and is of benzaldehyde class. Its structure contains a dimethylamino group positioned para to the aldehyde group on the aromatic ring. The electron-donating nature of the dimethylamino group contributes to its characteristic reactivity and chromogenic behavior. Para-Dimethylaminobenzaldehyde readily forms colored products through reactions with certain nitrogen containing compounds. It is a key component of Ehrlich’s reagent and Kovac’s reagent for the detection of indoles and can also react with pyrroles and amines to produce characteristic colored derivatives.
CAS No.: 100-10-7
Synonyms: p-Dimethylaminobenzaldehyde, 4-Formyl-N,N-dimethylaniline, N,N-Dimethyl-4-formylaniline, DMAB.
| Physical Properties | |
| Chemical formula | C9H11NO |
| IUPAC Name | 4-(dimethylamino)benzaldehyde |
| Molecular weight | 149.19 g/mol |
| Solubility | Slightly soluble in water |
| Flash Point | 164 °C |
| Appearance | Off-white or pale yellow crystalline powder |
| Storage | Store at room temperature |
| Chemical Properties | |
| Color | Pale Yellow |
| Physical State | Solid |
| Melting Point | 72 -75 °C |
| Boiling Point | 176 °C |
| Odor | Characteristic odor |
| Pictograms : | |
| Hazard Statements : | H302: Harmful if swallowed. H315: Causes skin irritation. H319: Causes serious eye irritation. |
| Precautionary Statements: | P264: Wash skin thoroughly after handling. P270: Do not eat, drink or smoke when using this product. P280: Wear protective gloves/ eye protection/ face protection. P301 + P312 + P330: IF SWALLOWED: Call a POISON CENTER/ doctor if you feel unwell. Rinse mouth. P337 + P313: If eye irritation persists: Get medical advice/ attention. |
Para-Dimethylaminobenzaldehyde (DMAB) is primarily used as the active component in Ehrlich’s and Kovac’s reagents for detecting indoles, primary amines, and pyrroles. It is also used for hydrazine determination, microbiological identification of certain bacteria, clinical testing for urobilinogen and porphobilinogen, Schiff base synthesis and as a chemical intermediate in organic synthesis
Para-Dimethylaminobenzaldehyde is also known as 4-(dimethylamino)benzaldehyde. It is also known by abbreviations such as DMAB and PDAB and is closely associated with Ehrlich’s reagent, where it serves as the principal active reagent. Its molecular formula is C₉H₁₁NO.
Para-Dimethylaminobenzaldehyde (DMAB) is used in Ehrlich’s and Kovac’s reagents for the detection of indole. In an acidic medium, it reacts with the electron-rich indole ring, especially at the C-2 position to give a red or pink-to-red colored product. The appearance of this characteristic color indicates the presence of indole compounds in the sample.
