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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 17462Generated: October 23, 2026

C.I. Direct Red 81 disodium salt

Einecs 280-228-7 · 7-(Benzoylamino)-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-2-naphthalenesulfonic acid sodium salt · 7-(benzoylamino)-4-hydroxy-3-[[4-[(4-sulphophenyl)azo]phenyl]azo]naphthalene-2-sulphonic acid, sodium salt · 7-(Benzoylamino)-4-hydroxy-3-((4-((4-sulphophenyl)azo)phenyl)azo)naphthalene-2-sulphonic acid, sodium salt · 2-Naphthalenesulfonic acid, 7-(benzoylamino)-4-hydroxy- 3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-, sodium salt

https://huagongshe.com/en/chemical/17462

C.I. Direct Red 81 disodium salt molecular structure

Identifiers & Physical Properties

CAS No.2610-11-9
Molecular formulaC29H19N5Na2O8S2
Average molar mass675.6 g/mol
Monoisotopic mass675.04704313 g/mol
SMILESO=C(Nc1ccc2c(O)c(N=Nc3ccc(N=Nc4ccc(S(=O)(=O)[O-])cc4)cc3)c(S(=O)(=O)[O-])cc2c1)c1ccccc1.[Na+].[Na+]
InChIKeyUFUQRRYHIHJMPB-UHFFFAOYSA-L
PubChem CID17462
ChEMBLCHEMBL3182005
ChEBICHEBI:88191
EC No.280-228-7
DTXSIDDTXSID5041726

Chemical & Physical Properties

Topological polar surface area230
Hydrogen bond donors2
Hydrogen bond acceptors12
Rotatable bonds6
Heavy atoms46
Formal charge0
Complexity1,220
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