Direct Black 173

C.I.直接黑173

Also known as: 2-Naphthalenesulfonic acid, 6-[(4-amino-2-hydroxyphenyl)azo]-3-[[4-[[4-[[7-[(4-amino-2-hydroxyphenyl)azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]phenyl]amino]-3-sulfophenyl]azo]-4-hydroxy-, trisodium salt, 2-Naphthalenesulfonic acid, 6-[2-(4-amino-2-hydroxyphenyl)diazenyl]-3-[2-[4-[[4-[2-[7-[2-(4-amino-2-hydroxyphenyl)diazenyl]-1-hydroxy-3-sulfo-2-naphthalenyl]diazenyl]phenyl]amino]-3-sulfophenyl]diazenyl]-4-hydroxy-, sodium salt (1:3), trisodium 6-[(4-amino-2-hydroxyphenyl)azo]-3-[[4-[[4-[[7-[(4-amino-2-hydroxyphenyl)azo]-1-hydroxy-3-sulphonato-2-naphthyl]azo]phenyl]amino]-3-sulphonatophenyl]azo]-4-hydroxynaphthalene-2-sulphonate, 4,4'-Bis[7-(4-amino-2-hydroxyphenylazo)-1-hydroxy-3-sodiosulfo-2-naphtylazo][1,1'-iminobisbenzene]-2-sulfonic acid sodium salt, 6-(4-Amino-2-hydroxyphenylazo)-3-[4-[p-[7-(4-amino-2-hydroxyphenylazo)-1-hydroxy-3-sodiosulfo-2-naphtylazo]phenylamino]-3-sodiosulfophenylazo]-4-hydroxy-2-naphthalenesulfonic acid sodium salt, C.I. Direct Black 173, EINECS 279-047-6

Direct Black 173 (CAS 79057-88-8) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C44H30N11Na3O13S3 and a molecular weight of 1085.94000 g/mol. It is also known as 2-Naphthalenesulfonic acid, 6-[(4-amino-2-hydroxyphenyl)azo]-3-[[4-[[4-[[7-[(4-amino-2-hydroxyphenyl)azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]phenyl]amino]-3-sulfophenyl]azo]-4-hydroxy-, trisodium salt, 2-Naphthalenesulfonic acid, 6-[2-(4-amino-2-hydroxyphenyl)diazenyl]-3-[2-[4-[[4-[2-[7-[2-(4-amino-2-hydroxyphenyl)diazenyl]-1-hydroxy-3-sulfo-2-naphthalenyl]diazenyl]phenyl]amino]-3-sulfophenyl]diazenyl]-4-hydroxy-, sodium salt (1:3) and trisodium 6-[(4-amino-2-hydroxyphenyl)azo]-3-[[4-[[4-[[7-[(4-amino-2-hydroxyphenyl)azo]-1-hydroxy-3-sulphonato-2-naphthyl]azo]phenyl]amino]-3-sulphonatophenyl]azo]-4-hydroxynaphthalene-2-sulphonate. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

79057-88-8

Jingsj CID

J-937893-9

Molecular Formula

C₄₄H₃₀N₁₁Na₃O₁₃S₃

Chinese Name

C.I.直接黑173

Molecular Weight

1085.94000 g/mol

Category

Organic Compounds

Last updated

8/21/2026