Carminic acid

SIAL/229253 - ≥90% (HPLC)

Synonym: Natural Red 4

CAS Number: 1260-17-9
Empirical Formula (Hill Notation): C₂₂H₂₀O₁₃
Molecular Weight: 492.39
EC Number: 215-023-3
MDL Number: MFCD00167028
Linear Formula: C₂₂H₂₀O₁₃
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-229253-1G	1 g	$317.00 1/EA	Add To Favorites
45-229253-5G	5 g	$1060.00 1/EA	Add To Favorites

This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 229253-1G

Properties
Descriptions
Safety Info.
Basic Data

ε (extinction coefficient)	≥13000 at 222-228 nm in ethanol at 0.03 g/L
	≥18000 at 275-281 nm in ethanol at 0.03 g/L
λ_max	495 nm
application(s)	diagnostic assay manufacturing hematology histology
assay	≥90% (HPLC)
color	purple to red-purple
	red to very dark red
form	powder
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-JNVSTXMASA-N
mp	136 °C
optical activity	[α]20/D +3.1°, c = 1 in H₂O
Quality Level	100
SMILES string	Cc1c(C(O)=O)c(O)cc2C(=O)c3c(O)c(O)c([C@@H]4O[C@H](CO)[C@@H](O)[C@H](O)[C@H]4O)c(O)c3C(=O)c12
solubility	1 N acetic acid: 1%, clear to hazy, red
storage temp.	room temp

Application:	Carminic acid (CI 75470) is used in Orth’s lithium carmine technique for nuclear staining, Best’s stain for glycogen, and Southgates’s mucicarmine method.
General description:	Carmine is a cochineal product usually furnished as an aluminum and calcium salt of carminic acid. Carminic acid is used for human-medical cell diagnosis and serves the purpose of the histological investigation of sample material of human origin. It is suitable for staining nuclei in histological sections. It is utilized in various staining methods including the procedure for detection of glycogen and mucous substances (Best’s carmine), for nuclear staining, or vital staining.
Packaging:	1, 5 g in glass bottle

RIDADR	NONH for all modes of transport
WGK Germany	WGK 2

Purity	≥90% (HPLC)
mp	136 °C
Storage Temp.	room temp
Colour Index Number	75470
UNSPSC	12171500

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