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3257-28-1

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Basic Information
CAS No.: 3257-28-1
Name: disodium 6-[(2,4-dimethyl-6-sulphonatophenyl)azo]-5-hydroxynaphthalene-1-sulphonate
Molecular Structure:
Molecular Structure of 3257-28-1 (disodium 6-[(2,4-dimethyl-6-sulphonatophenyl)azo]-5-hydroxynaphthalene-1-sulphonate)
Formula: C18H16 N2 O7 S2 . 2 Na
Molecular Weight: 480.44
Synonyms: 1-Naphthalenesulfonicacid, 6-[(2,4-dimethyl-6-sulfophenyl)azo]-5-hydroxy-, disodium salt (9CI); C.I.Food Red 2 (7CI); C.I. Food Red 2, disodium salt (8CI); Scarlet GN SpeciallyPure (6CI); Acid Scarlet GNA; Acid Scarlet JN Extra Pure A; C.I. 14815; CilefaRed G; E 125; E 125 (dye); Eurocert Scarlet GN; Food Red 2; Food Red No. 2; LRed Z 3000; Salmon Red Geigy; Scarlet GN
Density: g/cm3
Boiling Point: °Cat760mmHg
Flash Point: °C
Safety: Low toxicity by intravenous route. When heated to decomposition it emits toxic vapors of NOx and SOx.
PSA: 172.62000
LogP: 4.02380
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Chemistry

Chemistry informtion about C.I. Food Red 2, Disodium Salt (CAS NO.3257-28-1) is:
IUPAC Name: Disodium (6z)-6-[(2,4-Dimethyl-6-Sulfonatophenyl)Hydrazinylidene]-5-Oxonaphthalene-1-Sulfonate
Synonyms: Disodium 6-[(2,4-Dimethyl-6-Sulphonatophenyl)Azo]-5-Hydroxynaphthalene-1-Sulphonate ; Ci 14815 ; Cifoodred2 ; Scarletgn ; 1-Naphthalenesulfonic Acid, 6-[(2,4-Dimethyl-6-Sulfophenyl)Azo]-5-Hydroxy-, Disodium Salt ; 5-Hydroxy-6-[(2,4-Dimethyl-6-Sodiosulfophenyl)Azo]Naphthalene-1-Sulfonic Acid Sodium Salt ; E-125 ; Scharlach Gn
Product Categories: Organics
MF: C18H14N2Na2O7S2
MW: 480.4225
EINECS: 221-856-3
Following is the molecular structure of C.I. Food Red 2, Disodium Salt (CAS NO.3257-28-1) is:

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 oral > 5gm/kg (5000mg/kg)   Annales Pharmaceutiques Francaises. Vol. 15, Pg. 402, 1957.
rat LD50 intraperitoneal > 2gm/kg (2000mg/kg)   Annales Pharmaceutiques Francaises. Vol. 15, Pg. 402, 1957.
rat LD50 intravenous 1gm/kg (1000mg/kg)   Annales Pharmaceutiques Francaises. Vol. 15, Pg. 402, 1957.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Low toxicity by intravenous route. When heated to decomposition it emits toxic vapors of NOx and SOx.