C.I. Food Blue 2

Description

Food Blue 2 · CAS 2650-18-2 · C37H36N2O9S3.2H3N. UNII 86R7G3C26F.

Identification

CAS Registry Number	2650-18-2
PubChem CID	17559
Molecular formula	C37H36N2O9S3.2H3N
IUPAC name	diazanium;2-[[4-[ethyl-[(3-sulfonatophenyl)methyl]amino]phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]benzenesulfonate
UNII (FDA)	86R7G3C26F

Computed Descriptors

Molecular Weight	783.0
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	10
Rotatable Bond Count	9
Exact Mass	782.21139245
Monoisotopic Mass	782.21139245
Topological Polar Surface Area	205
Heavy Atom Count	53
Formal Charge	0
Complexity	1510

Physical description & handling notes

• Wet Solid; Dry Powder; Liquid
• Solid; [MSDSonline]
• Reddish-violet powder or granules with a metallic lustre /sodium salt/
• Soluble in water (5% at 20 °C and 98 °C) and in ethanol
• STABILITY OF LIQ FORMULATIONS CONTAINING BRILLIANT BLUE FCF (7-11.5 MO PERIOD) DECR AT AMBIENT TEMP; MOST IMPORTANT FACTOR DIFFUSE LIGHT
• Present at 0.001 wt% in a typical shampoo colorant /from table/

Regulatory Status

Regulatory & Food Contact	CIR / INCI: Cosmetic colorant
GHS notification summary	61.3% (166 / 271)

GHS Hazard Classification

GHS notification summary	61.3% (166 / 271)
Reported hazard statements	H319 (38.4%)

Documented Uses

• Used as a dye (wool, silk, nylon, paper, hair rinses, drug solutions, and soap), wood stain, biological stain, and indicator; [HSDB]
• Pulp and Paper Processing [Category: Industry]
• Painting (Pigments, Binders, and Biocides) [Category: Paint]
• Textiles (Printing, Dyeing, or Finishing) [Category: Industry]
• Dressing Hair [Category: Other]
• Dyeing wool, silk, nylon, paper, soap; wood stain; biological stain; indicator

Synonyms

C.I. Acid Blue 9; Erioglaucine A; Alphazurine FG; Erioglaucine; Erioglaucine E; Japan Blue 205; Alphazurine FGND; Neptune Blue WF; Fenazo Blue XR; Patent Blue AE; Calcocid Blue EG; Kiton Blue AR; Xylene Blue VSG; Neptune Blue BRA; Patent Blue 2Y; Calcocid Blue 2G

Frequently Asked Questions

What are the CAS number and molecular formula of Food Blue 2?

CAS 2650-18-2; molecular formula C37H36N2O9S3.2H3N; molecular weight — g/mol.

What other names is Food Blue 2 known by?

C.I. Acid Blue 9, Erioglaucine A, Alphazurine FG, Erioglaucine, Erioglaucine E, Japan Blue 205.

What is the regulatory status of Food Blue 2?

Documented regulatory listings: CIR / INCI: Cosmetic colorant.

Is Food Blue 2 classified as hazardous?

61.3% of GHS notifications report no hazard classification (166 of 271).

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.