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Lithol Rubine BK

analytical standard

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Synonym(s):
E180, 3-Hydroxy-4-[(4-methyl-2-sulfophenyl)azo]-2-naphthoic acid calcium salt
Empirical Formula (Hill Notation):
C18H12CaN2O6S
CAS Number:
5281-04-9
Molecular Weight:
424.44
Colour Index Number:
15850
EC Number:
226-109-5
UNSPSC Code:
85151701
E Number:
E180
NACRES:
NA.24

grade

analytical standard

Quality Level

100

Assay

≥95.0% (HPLC)

shelf life

limited shelf life, expiry date on the label

technique(s)

HPLC: suitable
gas chromatography (GC): suitable

application(s)

cleaning products
cosmetics
food and beverages
personal care

format

neat

SMILES string

[Ca++].Cc1ccc(N=Nc2c(O)c(cc3ccccc23)C([O-])=O)c(c1)S([O-])(=O)=O

InChI

1S/C18H14N2O6S.Ca/c1-10-6-7-14(15(8-10)27(24,25)26)19-20-16-12-5-3-2-4-11(12)9-13(17(16)21)18(22)23;/h2-9,19H,1H3,(H,22,23)(H,24,25,26);/q;+2/p-2/b20-16-;

InChI key

WANIKCLUTOABTP-LRZQPWDCSA-L

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General description

Lithol Rubine BK (E-180) is a red mono azo dye, authorized as a food additive by the European Union. It belongs to the class of food dyes, which are used to give colorless foodstuffs a more characteristic appearance as well as to change the original colors to preferred artificial ones. E-180 is reported to be used in edible cheese rind, following the Quantum Satis (QS) principle.
This product is provided by Sigma-Aldrich as a neat standard for the precise quality control of food products. In the European Union, E numbers are used as codes for food color additives. E numbers 100-199 include not only artificial food colors derived from petroleum, but also natural additives originating from sources such as vegetables, insects, or mixtures made from natural foodstuffs.

Application

Lithol Rubine BK may be used as a chelating agent for the determination of mercury (II) in water samples by spectrophotometric method.
Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support.

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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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Encapsulation of water-soluble dye in spherical sol-gel silica matrices
Kim.S.M, et al.
Journal of Sol-Gel Science and Technology, 27, 355-361 (2003)
A Cloud Point Extraction to Comparative Determination of Mercury (II) in Various Water Samples by the Spectrophotometric Method
Nekouei S and Nekouei F
Orient. J. Chem., 30(2), 873-878 (2014)
Food Analysis by HPLC (2012)
Crystal structures of the hydration states of pigment red 57: 1
Barros AA and Cabral.OJ
Angewandte Chemie (International Edition in English), 51, 4735-4738 (2012)
Scientific Opinion on the re-evaluation of Litholrubine BK (E 180) as a food additive
EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS)
EFSA Journal, 8(5), 1586-1586 (2010)

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