Carminic acid appears as dark purplish-brown mass or bright red or dark red powder. Darkens at 248 °F. Deep red color in water. Yellow to violet in acidic aqueous solutions. (NTP, 1992)
Carminic acid appears as dark purplish-brown mass or bright red or dark red powder. Darkens at 248 °F. Deep red color in water. Yellow to violet in acidic aqueous solutions. (NTP, 1992)
| Physical Description | Carminic acid appears as dark purplish-brown mass or bright red or dark red powder. Darkens at 248 °F. Deep red color in water. Yellow to violet in acidic aqueous solutions. (NTP, 1992) |
| Color/Form | Red monoclinic prisms from aqueous methanol |
| Melting Point | Decomposes at 277 °F (NTP, 1992) |
| Solubility | less than 1 mg/mL at 70 °F (NTP, 1992) |
| IUPAC Name | 3,5,6,8-tetrahydroxy-1-methyl-9,10-dioxo-7-[(2S,3R,4R,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]anthracene-2-carboxylic acid |
| Molecular Formula | C22H20O13 |
| Molecular Weight | 492.4 g/mol |
| CAS | 1260-17-9 |
| SMILES | CC1=C2C(=CC(=C1C(=O)O)O)C(=O)C3=C(C2=O)C(=C(C(=C3O)O)[C@H]4[C@@H]([C@H]([C@@H]([C@H](O4)CO)O)O)O)O |
| InChIKey | DGQLVPJVXFOQEV-JNVSTXMASA-N |
| Catalog No | KC.310099 |
| Pack sizes | 1gm · 5gm |