Molecule structure of Direct Yellow 12 (CAS NO.2870-32-8):

IUPAC Name: Disodium 5-(4-ethoxyphenyl)diazenyl-2-[(Z)-2-[4-(4-ethoxyphenyl)diazenyl-2-sulfonatophenyl]ethenyl]benzenesulfonate 
Molecular Weight: 680.65898 g/mol
Molecular Formula: C₃₀H₂₆N₄Na₂O₈S₂
H-Bond Acceptor: 12
Rotatable Bond Count: 10
Exact Mass: 680.098745
MonoIsotopic Mass: 680.098745
Topological Polar Surface Area: 182
Heavy Atom Count: 46
Canonical SMILES: CCOC1=CC=C(C=C1)N=NC2=CC(=C(C=C2)C=CC3=C(C=C(C=C3)N=NC4=CC=C(C=C4)CC)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+]
Isomeric SMILES: CCOC1=CC=C(C=C1)N=NC2=CC(=C(C=C2)/C=C\C3=C(C=C(C=C3)N=NC4=CC=C(C=C4)CC)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+]
InChI: InChI=1S/C30H28N4O8S2.2Na/c1-3-41-27-15-11-23(12-16-27)31-33-25-9-7-21(29(19-25)43(35,36)37)5-6-22-8-10-26(20-30(22)44(38,39)40)34-32-24-13-17-28(18-14-24)42-4-2;;/h5-20H,3-4H2,1-2H3,(H,35,36,37)(H,38,39,40);;/q;2*+1/p-2/b6-5-,33-31?,34-32;;
InChIKey: YQMJDPHTMKUEHG-RPKDOIGLSA-L
EINECS: 220-698-2
Product Categories: Dyes and Pigments;Organics;Stilbenes

 Direct Yellow 12 (CAS NO.2870-32-8) is used for dyeing of cotton, linen, viscose fiber and cellulose fibers. It is also used fordyeing of leather and paper pulp.

WGK Germany: 3

 Direct Yellow 12 (CAS NO.2870-32-8) is also named as 2,2'-(1,2-Ethenediyl)bis(5-((4-ethoxyphenyl)azo)benzenesulfonic acid), disodium salt ; Airedale Yellow CHD ; Amanil Chrysophenine G ; Atlantic Chrysophenine YA ; Aurophenine O ; Benzanil Yellow CH ; Benzo Yellow LG ; C.I. 24895 ; C.I. Direct Yellow 12 ; Calcomine Brilliant Yellow ; Chrome Leather Yellow CH ; Chrysophenine ; Chrysophenine ESP ; Chrysophenine Extra ; Chrysophenine G ; Chrysophenine G Extra ; Chrysophenine GP ; Chrysophenine J ; Chrysophenine NS ; Direct Yellow CHD ; Direct Yellow CV ; Fixanol Yellow 3G ; Kayaku Chrysophenine GE ; Kayaku Chrysophenine GN ; Kayaku Chrysophenine GX ; Pontamine Yellow CH ; Shikiso Chrysophenine GX ; Tertrodirect Yellow CG ; Vondacel Yellow CG . Direct Yellow 12 (CAS NO.2870-32-8) is orange crystalline powder.