1.04211

Carminic acid (C.I. 75470)

• Fórmula empírica (notación de Hill): C₂₂H₂₀O₁₃
• Número de CAS: 1260-17-9
• Peso molecular: 492.39
• Número MDL: MFCD00167028
• Código UNSPSC: 12352106
• NACRES: NA.21

Propiedades

• Ensayo: ≥92%
• Nivel de calidad: 200
• Formulario: solid
• pH: 1.6 (20 °C, 10 g/L in H₂O)
• mp: 136 °C (decomposition)
• solubilidad: 30 g/L
• densidad aparente: 490 kg/m³
• aplicaciones: diagnostic assay manufacturing; hematology; histology
• temp. de almacenamiento: 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
• Clave InChI: DGQLVPJVXFOQEV-NGOCYOHBSA-N

Descripción

Descripción general

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.

Aplicación

GR for analysis and for microscopy

Nota de análisis

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

Información de seguridad

• Código de clase de almacenamiento: 11 - Combustible Solids
• Clase de riesgo para el agua (WGK): WGK 2