1.04211

Carminic acid (C.I. 75470)

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

Propriedades

• Ensaio: ≥92%
• Nível de qualidade: 200
• Formulário: solid
• pH: 1.6 (20 °C, 10 g/L in H₂O)
• pf: 136 °C (decomposition)
• solubilidade: 30 g/L
• densidade volumétrica: 490 kg/m³
• aplicação(ões): diagnostic assay manufacturing; hematology; histology
• temperatura de armazenamento: 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
• chave InChI: DGQLVPJVXFOQEV-NGOCYOHBSA-N

Descrição

Descrição geral

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.

Aplicação

GR for analysis and for microscopy

Nota de análise

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

Informações de segurança

• Código de classe de armazenamento: 11 - Combustible Solids
• Classe de risco de água (WGK): WGK 2