FD&C Blue No. 1

Brilliant blue FCF (Blue 1) is a synthetic organic compound used primarily as a blue colorant for processed foods, medications, dietary supplements, and cosmetics. It is classified as a triarylmethane dye and is known under various names, such as FD&C Blue No. 1 or acid blue 9. It is denoted by E number E133 and has a color index of 42090. It has the appearance of a blue powder and is soluble in water and glycerol, with a maximum absorption at about 628 nanometers. It is one of the oldest FDA-approved color additives, having been permanently listed for use in food and ingested drugs in 1969. It is generally considered nontoxic and safe for consumption.

Brilliant blue FCF

Names
IUPAC name disodium;2-[[4-[ethyl-[(3-sulfonatophenyl)methyl]amino]phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]benzenesulfonate
Other names FD&C Blue No.1 Acid blue 9 D&C Blue No. 4 Atracid Blue FG Acilan Turquoise Blue AE Aizen Brilliant Blue FCF Alzen Food Blue No. 1 Erioglaucine Eriosky blue Patent Blue AR Xylene Blue VSG C.I. 42090 CI Food Blue 2 Basacid Blue 755 Sulfacid Brilliant Blue 5 J Neolan Blue E-A Brilliant Blue FD Brilliant Blue Lake Blue #1 Lake Bucacid Azure Blue
Identifiers
CAS Number	3844-45-9 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:82411
ChEMBL	ChEMBL423337 N
ChemSpider	18556 Y
ECHA InfoCard	100.021.219
EC Number	223-339-8
E number	E133 (colours)
KEGG	C19352
PubChem CID	19700
UNII	H3R47K3TBD Y
CompTox Dashboard (EPA)	DTXSID2020189
InChI InChI=1S/C37H36N2O9S3.2Na/c1-3-38(25-27-9-7-11-33(23-27)49(40,41)42)31-19-15-29(16-20-31)37(35-13-5-6-14-36(35)51(46,47)48)30-17-21-32(22-18-30)39(4-2)26-28-10-8-12-34(24-28)50(43,44)45;;/h5-24H,3-4,25-26H2,1-2H3,(H2-,40,41,42,43,44,45,46,47,48);;/q;2*+1/p-2 Y Key: SGHZXLIDFTYFHQ-UHFFFAOYSA-L Y InChI=1/C37H36N2O9S3.2Na/c1-3-38(25-27-9-7-11-33(23-27)49(40,41)42)31-19-15-29(16-20-31)37(35-13-5-6-14-36(35)51(46,47)48)30-17-21-32(22-18-30)39(4-2)26-28-10-8-12-34(24-28)50(43,44)45;;/h5-24H,3-4,25-26H2,1-2H3,(H2-,40,41,42,43,44,45,46,47,48);;/q;2*+1/p-2 Key: SGHZXLIDFTYFHQ-NUQVWONBAU
SMILES CCN(CC1=CC(=CC=C1)S(=O)(=O)[O-])C2=CC=C(C=C2)C(=C3C=CC(=[N+](CC)CC4=CC(=CC=C4)S(=O)(=O)[O-])C=C3)C5=CC=CC=C5S(=O)(=O)[O-].[Na+].[Na+]
Properties
Chemical formula	C37H34N2Na2O9S3
Molar mass	792.85 g/mol
Melting point	283 °C (decomposes)
Solubility in water	soluble
Hazards
NFPA 704 (fire diamond)	2 1 0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references