1.04211

Carminic acid (C.I. 75470)

• Formula empirica (notazione di Hill): C₂₂H₂₀O₁₃
• Numero CAS: 1260-17-9
• Peso molecolare: 492.39
• Numero MDL: MFCD00167028
• Codice UNSPSC: 12352106
• NACRES: NA.21

Proprietà

• Saggio: ≥92%
• Livello qualitativo: 200
• Stato: solid
• pH: 1.6 (20 °C, 10 g/L in H₂O)
• Punto di fusione: 136 °C (decomposition)
• Solubilità: 30 g/L
• Densità bulk: 490 kg/m³
• applicazioni: diagnostic assay manufacturing; hematology; histology
• Temperatura di conservazione: 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; DGQLVPJVXFOQEV-NGOCYOHBSA-N

Descrizione

Descrizione generale

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.

Applicazioni

GR for analysis and for microscopy

Risultati analitici

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

Informazioni sulla sicurezza

• Codice della classe di stoccaggio: 11 - Combustible Solids
• Classe di pericolosità dell'acqua (WGK): WGK 2