Pigment Red 166

N,N'-1,4-亚苯基-二[4-[(2,5-二氯苯基)偶氮]-3-羟基萘-2-甲酰胺]

Also known as: C.I. 20730, C.I. Pigment Red 166, Pigment Red 166, Pigment red 166 (C.I. 20730), 1,4-Bis[1-[(2,5-dichlorophenyl)azo]-2-hydroxynaphthalen-3-ylcarbonylamino]benzene, 1,4-Bis[[1-(2,5-dichlorophenylazo)-2-hydroxy-3-naphthoyl]amino]benzene, CroMophtal Scarlet R, Cromophtal Scarlet R, Cromophtal Scarlet R (CGY), Disazo Scarlet, N,N'-1,4-phenylenebis[4-(2,5-dichlorophenyl)azo]-3-hydroxy-2-Naphthalenecarboxamide, N,N'-phenylene-1,4-bis[4-[(2,5-dichlorophenyl)azo]-3-hydroxynaphthalene-2-carboxamide], P.R.166

Pigment Red 166 (CAS 3905-19-9) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C40H24Cl4N6O4 and a molecular weight of 794.46800 g/mol. It is also known as C.I. 20730, C.I. Pigment Red 166 and Pigment red 166 (C.I. 20730). Key properties include a boiling point of 902.5ºC at 760mmHg, a density of 1.5 and a flash point of 499.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

3905-19-9

Jingsj CID

J-1326425-3

Molecular Formula

C₄₀H₂₄Cl₄N₆O₄

Chinese Name

N,N'-1,4-亚苯基-二[4-[(2,5-二氯苯基)偶氮]-3-羟基萘-2-甲酰胺]

Molecular Weight

794.46800 g/mol

Category

Organic Bases

Last updated

8/21/2026