Product Name

  • Name

    ACID RED 1

  • EINECS 223-098-9
  • CAS No. 3734-67-6
  • Article Data1
  • CAS DataBase
  • Density 1.37-1.774[at 20℃]
  • Solubility soluble in water and slightly soluble in ethanol
  • Melting Point
  • Formula C18H13N3Na2O8S2
  • Boiling Point 794.21℃[at 101 325 Pa]
  • Molecular Weight 509.428
  • Flash Point
  • Transport Information
  • Appearance Red powder or granules
  • Safety 22-24/25
  • Risk Codes
  • Molecular Structure Molecular Structure of 3734-67-6 (ACID RED 1)
  • Hazard Symbols
  • Synonyms 1-Naphthol-3,6-disulfonicacid, 8-acetamido-2-phenylazo-, disodium salt (6CI);C.I. Acid Red 1, disodium salt (8CI);1379 Red;Acetyl Red J;Acid Bright Red;Acid Brilliant Red;Acid Fast Red EG;AcidGeranine 2G;Acid Geranine 2GN;Acid Leather Red KG;Acid Phloxine GA;Acid Red GN;Acid Rose 2GL;Acidine Red G;Ahcocid Carmine 2G;Amacid Phloxine G;Amecid Floxine 2GN;AmidoNaphthol Red G;Amido Red 2G;Atul Acid Geranine G;AzoGeranine;Azo Geranine 2GA;Azo PhloxineGA-CF;Azonaphthol Red J;Azophloxine;Concorde Acid Red 3B;Dermacid Pink B;Dyacid Rose 2G;Edicol Supra Geranine 2GS;Egacid Red G;Erio Floxine 2G;Eurocert Red 2G311826;Fabracid Red S 2G;Fast Red 2GL;Food Red 10;Hexacol Red 2G;Intracid Red 2G Conc;Kiton Red 2G;
  • PSA 205.21000
  • LogP 4.96200

Synthetic route

C12H9NO8S2(2-)*2Na(1+)

C12H9NO8S2(2-)*2Na(1+)

aniline
62-53-3

aniline

azophloxine
3734-67-6

azophloxine

Conditions
ConditionsYield
Stage #1: aniline With hydrogenchloride In water; N,N-dimethyl-formamide at 25℃;
Stage #2: With sodium nitrite In water; N,N-dimethyl-formamide
Stage #3: C12H9NO8S2(2-)*2Na(1+) In water; N,N-dimethyl-formamide at 25℃; for 0.00888889h;		98.2%
azophloxine
3734-67-6

azophloxine

dihydrogen peroxide
7722-84-1

dihydrogen peroxide

Conditions
ConditionsYield
With TiO2; NaF; formic acid In water Kinetics; Irradiation (UV/VIS); aq. NaF added to TiO2; aq. suspn. of Acid Red 1 on fluorinated TiO2 in presence of formic acid irradiated (315-400 nm) at 35°C underatmospheric conditions; monitored by spectrophotometrically and by fluorimetric analysis;
titanium(IV) oxide In water Kinetics; Irradiation (UV/VIS); aq. suspn. of Acid Red 1 contg. TiO2 irradiated (315-400 nm) at 35°C under atmospheric conditions; monitored by spectrophotometrically and by fluorimetric analysis;
With 2-propanol; titanium(IV) oxide In water Kinetics; Irradiation (UV/VIS); aq. suspn. of Acid Red 1 contg. TiO2 and 2-propanol irradiated (315-400 nm) at 35°C underatmospheric conditions; monitored by spectrophotometrically and by fluorimetric analysis;
azophloxine
3734-67-6

azophloxine

carbon dioxide
124-38-9

carbon dioxide

Conditions
ConditionsYield
With dihydrogen peroxide at 70℃; pH=6.7; Kinetics; Reagent/catalyst; pH-value; Temperature;
azophloxine
3734-67-6

azophloxine

A

carbon dioxide
124-38-9

carbon dioxide

B

Ammonium

Ammonium

C

Nitrate

Nitrate

D

Sulfate
14808-79-8

Sulfate

Conditions
ConditionsYield
With ferrous(II) sulfate heptahydrate; sulfuric acid; water; oxygen; sodium sulfate at 35℃; pH=3.0; Kinetics; Mechanism; Reagent/catalyst; Electrochemical reaction; UV-irradiation;
...Expand
azophloxine
3734-67-6

azophloxine

A

C10H9NO7S

C10H9NO7S

B

C10H9NO8S

C10H9NO8S

C

C9H9NO7S

C9H9NO7S

D

C9H9NO6S

C9H9NO6S

Conditions
ConditionsYield
With CdS99.98Sm0.02 for 1.5h; pH=6; Kinetics; Reagent/catalyst; Irradiation;
...Expand
azophloxine
3734-67-6

azophloxine

A

aniline
62-53-3

aniline

B

benzene-1,2-dicarboxylic acid
88-99-3

benzene-1,2-dicarboxylic acid

Conditions
ConditionsYield
With dihydrogen peroxide In water at 60℃; for 12h; pH=2; Kinetics; Catalytic behavior; Reagent/catalyst; pH-value; Temperature;

Acid Red 1 Consensus Reports

Reported in EPA TSCA Inventory.

Acid Red 1 Specification

The IUPAC name of C.I. Acid Red 1, disodium salt is disodium 5-acetamido-4-oxo-3-(phenylhydrazinylidene)naphthalene-2,7-disulfonate. With the CAS registry number 3734-67-6, it is also named as 2,7-Naphthalenedisulfonic acid, 5-(acetylamino)-4-hydroxy-3-(phenylazo)-, disodium salt; Acid red 1; Red 2G. The product's categories are dyes and pigments; organics. It is red powder or granules which is soluble in water and slightly soluble in ethanol. When heated to decomposition it emits toxic vapors of NOx and SOx. In addition, people should not breathe dust and avoid contact with skin and eyes.

The other characteristics of this product can be summarized as: (1)#H bond acceptors: 11 ; (2)#H bond donors: 4 ; (3)#Freely Rotating Bonds: 6 ; (4)Rotatable Bond Count: 3 ; (5)Tautomer Count: 31 ; (6)Exact Mass: 508.993945 ; (7)MonoIsotopic Mass: 508.993945 ; (8)Topological Polar Surface Area: 202 ; (9)Heavy Atom Count: 33 ; (10)Complexity: 975.

Preparation of C.I. Acid Red 1, disodium salt: Aniline which is diazotized is coupling with 8-acetyl-1-hydroxy naphthalene 3,6-disulfonic acid. Then, we can get the product by salting and refined.

Uses of C.I. Acid Red 1, disodium salt: It is mainly used to dye all kind of natural fibres like wool, cotton and silk as well as to synthetics like polyesters, acrylic and rayon. And it is also used as edible red pigment.

People can use the following data to convert to the molecule structure. 
1. SMILES: [Na+].[Na+].CC(=O)Nc2cc(cc3cc(c(/N=N/c1ccccc1)c(O)c23)S([O-])(=O)=O)S([O-])(=O)=O;
2. InChI: InChI=1/C18H15N3O8S2.2Na/c1-10(22)19-14-9-13(30(24,25)26)7-11-8-15(31(27,28)29)17(18(23)16(11)14)21-20-12-5-3-2-4-6-12;;/h2-9,23H,1H3,(H,19,22)(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2/b21-20+;;.

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