disodium 4,4'-[[2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylene]bis(azo)]bisnaphthalene-1-sulphon

Introduction：Basic information about disodium 4,4'-[[2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylene]bis(azo)]bisnaphthalene-1-sulphon, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.

disodium 4,4'-[[2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylene]bis(azo)]bisnaphthalene-1-sulphonate Basic information

• Product Name: disodium 4,4'-[[2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylene]bis(azo)]bisnaphthalene-1-sulphonate
• Synonyms: 1538 Brown;C.I.20285;Certicol Brown N Extra;Cetricol Brown RS;disodium 4,4'-[[2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylene]bis(azo)]bisnaphthalene-1-sulphonate;Disodium-4,4-(2,4-Dihydroxy-5-HydroxyMethyl-1,3-PhenyleneBisazo)-Di(Naphthalene-1-Sulfonate);Brown HT;1-Naphthalenesulfonic acid, 4,4-2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylenebis(azo)bis-, disodium salt
• CAS: 4553-89-3
• MF: C27H18N4Na2O9S2
• MW: 652.56276
• EINECS: 224-924-0
• Mol File: 4553-89-3.mol

disodium 4,4'-[[2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylene]bis(azo)]bisnaphthalene-1-sulphonate Chemical Properties

• Melting point: >300o C
• density: 0.816[at 20℃]
• vapor pressure: 0Pa at 25℃
• storage temp.: Hygroscopic, Refrigerator, Under inert atmosphere
• solubility: DMSO (Slightly, Heated, Sonicated), Methanol (Slightly)
• form: Solid
• color: Pale Brown to Black
• Water Solubility: 99.418g/L at 25℃
• Stability: Hygroscopic
• LogP: 4.496 at 25℃

Safety Information

• Toxicity: LD50 oral in rat: > 2gm/kg

disodium 4,4'-[[2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylene]bis(azo)]bisnaphthalene-1-sulphonate Usage And Synthesis

Chemical Properties

Brown powder or granules. Soluble in water. Insoluble in ethanol.

Uses

Chocolate Brown HT (CAS# 4553-89-3) is a synthetic organic food colourant, and a long-term carcinogen.

Preparation

4-Hydroxynaphthalene-1-sulfonic acid (2 Moore) diazo, and 4-(Hydroxymethyl)benzene-1,3-diol?coupled.

Flammability and Explosibility

Non flammable

Properties and Applications

red light brown. Soluble in water for brown. The strong sulfuric acid for red purple, diluted chocolate brown for red precipitate to brown precipitation and the solution. Its water solution and strong hydrochloric acid for dark chocolate brown precipitation and the solution; Add sodium hydroxide solution for product red.

disodium 4,4'-[[2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylene]bis(azo)]bisnaphthalene-1-sulphonate Preparation Products And Raw materials

• Raw materials: 1-Naphthol-4-sulfonic acid-->4-(hydroxymethyl)resorcinol