229253

Carminic acid

≥90% (HPLC)

• Synonyme(s) : Natural Red 4
• Formule empirique (notation de Hill): C₂₂H₂₀O₁₃
• Numéro CAS: 1260-17-9
• Poids moléculaire : 492.39
• Numéro C.I. (Colour Index): 75470
• Numéro Beilstein : 71651
• Numéro CE : 215-023-3
• Numéro MDL: MFCD00167028
• Code UNSPSC : 12171500
• ID de substance PubChem : 24853740
• Nomenclature NACRES : NA.47

Propriétés

• Niveau de qualité: 100
• Pureté: ≥90% (HPLC)
• Forme: powder
• Activité optique: [α]20/D +3.1°, c = 1 in H₂O
• Couleur: purple to red-purple; red to very dark red
• Pf: 136 °C
• Solubilité: 1 N acetic acid: 1%, clear to hazy, red
• λmax: 495 nm
• ε (coefficient d'extinction): ≥13000 at 222-228 nm in ethanol at 0.03 g/L; ≥18000 at 275-281 nm in ethanol at 0.03 g/L
• Application(s): diagnostic assay manufacturing; hematology; histology
• Température de stockage: room temp
• Chaîne SMILES: Cc1c(C(O)=O)c(O)cc2C(=O)c3c(O)c(O)c([C@@H]4O[C@H](CO)[C@@H](O)[C@H](O)[C@H]4O)c(O)c3C(=O)c12
• InChI: 1S/C22H20O13/c1-4-8-5(2-6(24)9(4)22(33)34)13(25)10-11(15(8)27)16(28)12(18(30)17(10)29)21-20(32)19(31)14(26)7(3-23)35-21/h2,7,14,19-21,23-24,26,28-32H,3H2,1H3,(H,33,34)/t7-,14-,19+,20-,21+/m1/s1
• Clé InChI: DGQLVPJVXFOQEV-JNVSTXMASA-N

Description

Description générale

Carmine is a cochineal product usually furnished as an aluminum and calcium salt of carminic acid. Carminic acid is used for human-medical cell diagnosis and serves the purpose of the histological investigation of sample material of human origin. It is suitable for staining nuclei in histological sections. It is utilized in various staining methods including the procedure for detection of glycogen and mucous substances (Best′s carmine), for nuclear staining, or vital staining.

Application

Carminic acid (CI 75470) is used in Orth′s lithium carmine technique for nuclear staining, Best′s stain for glycogen, and Southgates′s mucicarmine method.

Informations sur la sécurité

• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 2
• Équipement de protection individuelle: Eyeshields, Gloves, type N95 (US)