Acid Blue 9 (diammonium salt)

酸性蓝9

Also known as: Benzenemethanaminium, N-ethyl-N-[4-[[4-[ethyl[(3-sulfophenyl)methyl]amino]phenyl](2-sulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-3-sulfo-, inner salt, diammonium salt, C.I. 42090 (diammonium salt), Erioglaucine A (diammonium salt), Food Blue 2 (diammonium salt), Diammonium 2-[(Z)-{4-[ethyl(3-sulfonatobenzyl)amino]phenyl}{(4Z)-4-[ethyl(3-sulfonatobenzyl)iminio]-2,5-cyclohexadien-1-ylidene}methyl]benzenesulfonate, Alphazurine FG (diammonium salt), Acid Brilliant Blue FCF (diammonium salt)

Acid Blue 9 (diammonium salt) (CAS 2650-18-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C37H42N4O9S3 and a molecular weight of 782.946 g/mol. It is also known as Benzenemethanaminium, N-ethyl-N-[4-[[4-[ethyl[(3-sulfophenyl)methyl]amino]phenyl](2-sulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-3-sulfo-, inner salt, diammonium salt, C.I. 42090 (diammonium salt) and Erioglaucine A (diammonium salt). Key property: a melting point of 283 °C (dec.)(lit.). No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

2650-18-2

Jingsj CID

J-11575-9

Molecular Formula

C₃₇H₄₂N₄O₉S₃

Chinese Name

酸性蓝9

Molecular Weight

782.946 g/mol

Category

Organic Acids

Last updated

8/21/2026