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Acid Red 151

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  • Name Acid Red 151
  • EINECS229-029-9
  • CAS No. 6406-56-0
  • Density1.41 g/cm3
  • PSA135.25000
  • LogP7.36110
  • Solubilityyet soluble in water, ethanol is orange red, and soluble in glycol ethylene ether, insoluble in other organic solvents
  • Melting PointN/A
  • FormulaC22H15N4O4S.Na
  • Boiling Point855.43℃[at 101 325 Pa]
  • Molecular Weight454.441
  • Flash PointN/A
  • Transport InformationN/A
  • Appearancekermesinus powder
  • Safety
  • Risk CodesN/A
  • Molecular Structure
    Molecular Structure of 6406-56-0 (ACID RED 151)
  • Hazard SymbolsN/A
  • SynonymsN/A

Acid Red 151 Specification

The Acid Red 151, with the CAS registry number 6406-56-0, is also known as Sodium 4-(4-(2-hydroxynaphthalenylazo)phenylazo)benzenesulphonate. It belongs to the product categories of Dyes and Pigments; Organics. Its EINECS number is 229-029-9. This chemical's molecular formula is C22H15N4O4S.Na and molecular weight is 454.43. What's more, its systematic name is Sodium 4-({4-[(2-hydroxy-1-naphthyl)diazenyl]phenyl}diazenyl)benzenesulfonate. This chemical is suitable for dyeing of nylon, silk, wool and wool fabric.

Physical properties of Acid Red 151 are: (1)#H bond acceptors: 8; (2)#H bond donors: 2; (3)#Freely Rotating Bonds: 6; (4)Polar Surface Area: 135.25 Å2.

Preparation of m-Toluamide: this chemical can be prepared by 4-aminoazophenyl-4 '-sulfonic acid and 2-naphthol. First diazotize the former, and then couple with the latter, amd finally the product is got.

You can still convert the following datas into molecular structure:
(1)SMILES: [Na+].[O-]S(=O)(=O)c1ccc(cc1)N=Nc2ccc(cc2)N=Nc3c4ccccc4ccc3O
(2)Std. InChI: InChI=1S/C22H16N4O4S.Na/c27-21-14-5-15-3-1-2-4-20(15)22(21)26-25-17-8-6-16(7-9-17)23-24-18-10-12-19(13-11-18)31(28,29)30;/h1-14,27H,(H,28,29,30);/q;+1/p-1
(3)Std. InChIKey: QERXHBDEEFLTOL-UHFFFAOYSA-M

The toxicity data is as follows:  

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD50 oral 7736mg/kg (7736mg/kg) SENSE ORGANS AND SPECIAL SENSES: CHROMODACYRORREA: EYE

KIDNEY, URETER, AND BLADDER: OTHER CHANGES IN URINE COMPOSITION
National Technical Information Service. Vol. OTS0571003.

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