1.04211

Carminic acid (C.I. 75470)

• Empirische Formel (Hill-System): C₂₂H₂₀O₁₃
• CAS-Nummer: 1260-17-9
• Molekulargewicht: 492.39
• MDL-Nummer: MFCD00167028
• UNSPSC-Code: 12352106
• NACRES: NA.21

Eigenschaften

• Assay: ≥92%
• Qualitätsniveau: 200
• Form: solid
• pH-Wert: 1.6 (20 °C, 10 g/L in H₂O)
• mp (Schmelzpunkt): 136 °C (decomposition)
• Löslichkeit: 30 g/L
• Schüttdichte: 490 kg/m³
• Anwendung(en): diagnostic assay manufacturing; hematology; histology
• Lagertemp.: 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
• InChIKey: DGQLVPJVXFOQEV-NGOCYOHBSA-N

Beschreibung

Allgemeine Beschreibung

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.

Anwendung

GR for analysis and for microscopy

Hinweis zur 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

Sicherheitshinweise

• Lagerklassenschlüssel: 11 - Combustible Solids
• WGK: WGK 2