
Acid Red 52 is a synthetic dye belonging to the azo dye class, It is soluble in water and has a typical absorption spectrum that includes strong absorption in the visible range, contributing to its intense red hue. Acid Red 52 is often used in various applications requiring a red colorant.

CAS No.:3520-42-1
Synonyms: C.I. Acid Red 52; Sulforhodamine B sodium salt; Lissamine Rhodamine; Acid Rhodamine B; Xylene Red B; Amido Rhodamine B; Acid Red XB.Â
| Physical Properties | |
| Chemical formula | C27H29N2NaO7S2 |
| IUPAC Name | sodium;4-[3-(diethylamino)-6-diethylazaniumylidenexanthen-9-yl]benzene-1,3-disulfonate |
| Molecular weight | 580.7g/mol |
| Solubility | Water & Ethanol |
| Density | 1.38g/cm³ |
| Chemical Properties | |
| Color | Dark Red to Brown |
| State | Powder |
| Melting point | 205-210°C |
| λmax | 554 nm |
| pH | 2-3 |
| Pictograms : | ![]() |
| Hazard Statements : | H319: Causes serious eye irritation. |
| Precautionary statements : | P264: Wash hands, forearms, and exposed areas thoroughly after handling. P280: Wear protective gloves/ eye protection/ face protection P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present, and easy to do. Continue rinsing. P337 + P313: If eye irritation persists: Get medical advice/attention. |
Acid Red 52 is a synthetic dye belonging to the azo dye class, It is soluble in water and has a typical absorption spectrum that includes strong absorption in the visible range, contributing to its intense red hue. Acid Red 52 is often used in various applications requiring a red colorant.

CAS No.:3520-42-1
Synonyms: C.I. Acid Red 52; Sulforhodamine B sodium salt; Lissamine Rhodamine; Acid Rhodamine B; Xylene Red B; Amido Rhodamine B; Acid Red XB.Â
| Physical Properties | |
| Chemical formula | C27H29N2NaO7S2 |
| IUPAC Name | sodium;4-[3-(diethylamino)-6-diethylazaniumylidenexanthen-9-yl]benzene-1,3-disulfonate |
| Molecular weight | 580.7g/mol |
| Solubility | Water & Ethanol |
| Density | 1.38g/cm³ |
| Chemical Properties | |
| Color | Dark Red to Brown |
| State | Powder |
| Melting point | 205-210°C |
| λmax | 554 nm |
| pH | 2-3 |
| Pictograms : | ![]() |
| Hazard Statements : | H319: Causes serious eye irritation. |
| Precautionary statements : | P264: Wash hands, forearms, and exposed areas thoroughly after handling. P280: Wear protective gloves/ eye protection/ face protection P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present, and easy to do. Continue rinsing. P337 + P313: If eye irritation persists: Get medical advice/attention. |
Acid Red 52 is generally used as a dye in textiles and cosmetics.
Acid Red 52 is a synthetic dye with the chemical formula C27H29N2NaO7S2. It is commonly used in textiles and cosmetics.