1.04175

Carmine (C.I. 75470)

• Empirical Formula (Hill Notation): C₄₄H₃₇AlCaO₂₇ · 3H₂O
• CAS Number: 1390-65-4
• Molecular Weight: 1118.85

Properties

• form: solid
• Quality Level: 200
• composition: Dye, ≥50% spectrophotometric assay
• solubility: practically insoluble 1.3 g/L
• bulk density: 290 kg/m³
• application(s): diagnostic assay manufacturing; hematology; histology
• storage temp.: 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)
• InChI key: DGQLVPJVXFOQEV-UHFFFAOYSA-N

Description

General description

Carmine (C.I. 75470) (calcium-aluminium lacquer of carminic acid) for microscopy Certistain^®, is a dry dye that is used for the preparation of a staining solution for staining nuclei and for demonstration of glycogen in histological sections of human origin.
As a Certistain^® dye it is chemically quality-certified according to highest standards and strict specifications.

Application

(calcium-aluminium lacquer of carminic acid) for microscopy Certistain^®

Analysis Note

Identity
- aluminium:
passes test
- Calcium: passes test
- UV/VIS-Spectrum: passes test
Dye content (spectrophotometrically): ≥ 50 % (als C₂₂H₂₀O₁₃)
Absorption maximum λ 1 (Dimethyl sulfoxide): 565 - 570 nm
Absorption maximum λ 2 (Dimethyl sulfoxide): 525 - 532 nm
Spec. Absorptivity A 1%/1cm
- λ1<SUB>m</SUB><SUB>a</SUB><SUB>x</SUB>; 0.05 g/l; DMSO:
80 - 110
- λ2<SUB>m</SUB><SUB>a</SUB><SUB>x</SUB>; 0.05 g/l; DMSO: 105 - 150
TLC-Test: passes test
Water (according to Karl Fischer): ≤ 15 %
Sulfated ash: 10 - 17 %
Suitability for microscopy: passes test

Legal Information

CERTISTAIN is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable