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1.00211

Sigma-Aldrich

Carminic acid (C.I. 75470)

GR for analysis and for microscopy

Synonym(s):

Carminic acid (C.I. 75470)

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About This Item

Empirical Formula (Hill Notation):
C22H20O13
CAS Number:
1260-17-9
Molecular Weight:
492.39
MDL number:
MFCD00167028
UNSPSC Code:
41116130
EC Index Number:
215-023-3

Quality Level

400

Assay

≥92%

form

solid

pH

1.6 (20 °C, 10 g/L in H2O)

mp

136 °C (decomposition)

solubility

30 g/L

bulk density

490 kg/m3

εmax

160-187 at 492-495 nm in hydrochloric acid at 0.014 g/L

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)/t7-,14-,19+,20-,21-/m1/s1

InChI key

DGQLVPJVXFOQEV-NGOCYOHBSA-N

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General description

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 is a CE certified IVD product and has a constant dye content and a reliable high quality, which is one of the major precondition for a reproducible diagnostic staining. For more details, please see instructions for use (IFU). The IFU can be downloaded from this webpage.

Application

Carminic acid (C.I. 75470) For staining nuclei in histological sections. Used to prepare staining solutions.
CAS 1260-17-9, pH 1.6 (10 g/l, H₂O, 20 °C).

Analysis Note

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 (λmax; 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

Regulatory Information

监管及禁止进口产品

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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