Orange B

Orange B
Names
	IUPAC name Disodium 4-[N'-[3-ethoxycarbonyl-5-oxo-1-(4-sulfonatophenyl)-4-pyrazolylidene]hydrazino]-1-naphthalenesulfonate
	Other names C.I. Acid Orange 137; CI 19235
Identifiers
CAS Number	15139-76-1 ;
3D model (JSmol)	Interactive image;
ChemSpider	16735944 ;
ECHA InfoCard	100.035.622
EC Number	239-201-5;
PubChem CID	5362511;
UNII	RGU455OS50 ;
CompTox Dashboard (EPA)	DTXSID7044219 ;
	InChI InChI=1S/C22H18N4O9S2.2Na/c1-2-35-22(28)20-19(21(27)26(25-20)13-7-9-14(10-8-13)36(29,30)31)24-23-17-11-12-18(37(32,33)34)16-6-4-3-5-15(16)17;;/h3-12,27H,2H2,1H3,(H,29,30,31)(H,32,33,34);;/q;2+1/p-2/b24-23+;; Key: LLTKITSFUJSOCC-KPOOZVEVSA-L ; InChI=1/C22H18N4O9S2.2Na/c1-2-35-22(28)20-19(21(27)26(25-20)13-7-9-14(10-8-13)36(29,30)31)24-23-17-11-12-18(37(32,33)34)16-6-4-3-5-15(16)17;;/h3-12,27H,2H2,1H3,(H,29,30,31)(H,32,33,34);;/q;2+1/p-2/b24-23+;; Key: LLTKITSFUJSOCC-AQVGDJFIBI;
	SMILES [Na+].[Na+].[O-]S(=O)(=O)c4ccc(/N=N/c2c(nn(c1ccc(cc1)S([O-])(=O)=O)c2O)C(=O)OCC)c3ccccc34;
Properties
Chemical formula	C22H16N4Na2O9S2
Molar mass	590.49 g/mol
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Orange B is a food dye from the azo dye group. It is approved by the United States Food and Drug Administration (FDA) for use only in hot dog and sausage casings or surfaces, only up to 150 parts per million of the finished food weight.^[1] It is typically prepared as a disodium salt.^[1]

Orange B was first listed as an approved food dye by the FDA in 1966. In 1978, the FDA proposed removing it from the list citing concerns about the presence of carcinogenic contaminants (specifically 2-naphthylamine). Around the same time, the only supplier in the United States, the William J. Stange Company, stopped manufacturing it. Despite not having been used in any food products since then, it was not removed from the list.^[2]

References

^ ^a ^b "Code of Federal Regulations: Title 21, Section 74.250". U.S. Food and Drug Administration. Retrieved 24 December 2012.
^ Hathcock, John N. (1982). Nutritional Toxicology. New York: Academic Press. pp. 407–408. ISBN 012332601X.

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[21CFR74.250-1] "Code of Federal Regulations: Title 21, Section 74.250". U.S. Food and Drug Administration. Retrieved 24 December 2012.

[Hathcock1982-2] Hathcock, John N. (1982). Nutritional Toxicology. New York: Academic Press. pp. 407–408. ISBN 012332601X.

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