1.04211

Carminic acid (C.I. 75470)

• Formule empirique (notation de Hill): C₂₂H₂₀O₁₃
• Numéro CAS: 1260-17-9
• Poids moléculaire : 492.39
• Numéro MDL: MFCD00167028
• Code UNSPSC : 12352106
• Nomenclature NACRES : NA.21

Propriétés

• Pureté: ≥92%
• Niveau de qualité: 200
• Forme: solid
• pH: 1.6 (20 °C, 10 g/L in H₂O)
• Pf: 136 °C (decomposition)
• Solubilité: 30 g/L
• Masse volumique apparente: 490 kg/m³
• Application(s): diagnostic assay manufacturing; hematology; histology
• Température de stockage: 2-30°C
• 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-NGOCYOHBSA-N

Description

Description générale

The dye Carminic acid (C.I. 75470) GR for analysis and for microscopy, is a dry dye used to prepare dye-solutions. Together with a mordant solution of lithium, aluminium or boron it is used as a lake for staining. Carminic acid is applied for various stainings, e.g. for the detection of glycogen and mucous substances (Best′s carmine), for nucelar staining or for vital staining. The dye has a constant dye content and a reliable high quality, which is one of the major precondition for a reproducible diagnostic staining.

Application

GR for analysis and for microscopy

Remarque sur l'analyse

Assay (spectrophotometrically; calculated on dried substance)≥ 92 %Identity (UV/VIS-Spectrum)passes testAbsorption maximum λ max (Hydrochloric acid 0.06 mol/l)492 - 495 nmSpec. Absorptivity A 1%/1cm (λ_max; 0.014 g/l; Hydrochloric acid 0.06 mol/l; calc. on dried substance)160 - 187Loss on drying (110 °C)≤ 10 %Suitability for microscopypasses test

Informations sur la sécurité

• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 2