Quinaldine Red is a synthetic organic dye known for its deep red to purple color and distinctive chromogenic properties. It is also known as 1-Ethyl-2-p-dimethylaminostyrylquinoline iodide and has the chemical formula C₂₁H₂₃IN₂. It generally occurs as a dark red to purple crystalline solid and has a conjugated molecular structure that gives it strong light absorption in the visible region. These optical properties allow Quinaldine Red to produce noticeable color responses and support its use as a pH indicator and fluorescent probe in analytical and research applications.
CAS No.: 117-92-0
Synonyms: 1-Ethyl-2-p-dimethylaminostyrylquinoline iodide; 2-(p-Dimethylaminostyryl)quinoline ethiodide; α-(p-Dimethylaminophenylethylene)quinolineethiodide; 2-(p-(4-Dimethylamino)styryl)-1-ethylquinolinium iodide; 2-(2-(4-(Dimethylamino)phenyl)ethenyl)-1-ethylquinolinium iodide; 2-(2-(4-(dimethylamino)phenyl)ethenyl)-1-ethyl-quinolinium iodide; 2-(p-(dimethylamino)styryl)-1-ethyl-quinolinium iodide (8CI); 4-[(E)-2-(1-ethylquinolin-1-ium-2-yl)ethenyl]-N,N-dimethylaniline iodide.
| Physical Properties | |
| Chemical formula | C21H23IN2 |
| IUPAC Name | 2-{(1E)-2-[4-(Dimethylamino)phenyl]ethen-1-yl} -1-ethylquinolin-1-ium iodide |
| Molecular weight | 430.333 g/mol |
| Appearance | Dark green to black solid |
| Solubility | Soluble in water (partly), alcohol, and ethanol |
| Flash Point | 93.3 °C |
| Density | 4.61 g/cm3 |
| Storage | Store at room temperature |
| Chemical Properties | |
| Color | Green |
| Physical State | Solid |
| Melting Point | 240 °C |
| Pictograms : |  |
| Hazard Statements : | H315: Causes skin irritation H319: Causes serious eye irritation H335: May cause respiratory irritation |
| Precautionary Statements: | P233: Keep container tightly closed. P260: Do not breathe dust/fume/gas/mist/vapours/spray. P261: Avoid breathing dust/fume/gas/mist/vapours/spray. P264: Wash hands thoroughly after handling P271: Use only outdoors or in a well-ventilated area. P280: Wear protective gloves/protective clothing/eye protection/face protection. P302+P352: IF ON SKIN: Wash with plenty of soap and water. P304+P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. |
Quinaldine Red is a synthetic organic dye known for its deep red to purple color and distinctive chromogenic properties. It is also known as 1-Ethyl-2-p-dimethylaminostyrylquinoline iodide and has the chemical formula C₂₁H₂₃IN₂. It generally occurs as a dark red to purple crystalline solid and has a conjugated molecular structure that gives it strong light absorption in the visible region. These optical properties allow Quinaldine Red to produce noticeable color responses and support its use as a pH indicator and fluorescent probe in analytical and research applications.
CAS No.: 117-92-0
Synonyms: 1-Ethyl-2-p-dimethylaminostyrylquinoline iodide; 2-(p-Dimethylaminostyryl)quinoline ethiodide; α-(p-Dimethylaminophenylethylene)quinolineethiodide; 2-(p-(4-Dimethylamino)styryl)-1-ethylquinolinium iodide; 2-(2-(4-(Dimethylamino)phenyl)ethenyl)-1-ethylquinolinium iodide; 2-(2-(4-(dimethylamino)phenyl)ethenyl)-1-ethyl-quinolinium iodide; 2-(p-(dimethylamino)styryl)-1-ethyl-quinolinium iodide (8CI); 4-[(E)-2-(1-ethylquinolin-1-ium-2-yl)ethenyl]-N,N-dimethylaniline iodide.
| Physical Properties | |
| Chemical formula | C21H23IN2 |
| IUPAC Name | 2-{(1E)-2-[4-(Dimethylamino)phenyl]ethen-1-yl} -1-ethylquinolin-1-ium iodide |
| Molecular weight | 430.333 g/mol |
| Appearance | Dark green to black solid |
| Solubility | Soluble in water (partly), alcohol, and ethanol |
| Flash Point | 93.3 °C |
| Density | 4.61 g/cm3 |
| Storage | Store at room temperature |
| Chemical Properties | |
| Color | Green |
| Physical State | Solid |
| Melting Point | 240 °C |
| Pictograms : | |
| Hazard Statements : | H315: Causes skin irritation H319: Causes serious eye irritation H335: May cause respiratory irritation |
| Precautionary Statements: | P233: Keep container tightly closed. P260: Do not breathe dust/fume/gas/mist/vapours/spray. P261: Avoid breathing dust/fume/gas/mist/vapours/spray. P264: Wash hands thoroughly after handling P271: Use only outdoors or in a well-ventilated area. P280: Wear protective gloves/protective clothing/eye protection/face protection. P302+P352: IF ON SKIN: Wash with plenty of soap and water. P304+P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. |
Quinaldine Red is a synthetic organic dye used as a pH indicator, fluorescent probe, and colorimetric reagent. It is also used in protein studies including protein melting temperature (Tm) analysis, biological staining, and selected industrial applications.
Quinaldine Red is also known as 1-Ethyl-2-p-dimethylaminostyrylquinoline iodide. Its chemical formula is C₂₁H₂₃IN₂ and it is mainly used as a pH indicator and fluorescent probe.
