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Chemical Structure| 81-77-6 Chemical Structure| 81-77-6

Structure of Pigment blue 60
CAS No.: 81-77-6

Chemical Structure| 81-77-6

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Product Details of [ 81-77-6 ]

CAS No. :81-77-6
Formula : C28H14N2O4
M.W : 442.42
SMILES Code : O=C(C1=C2NC3=C(C(C4=O)=C(C(C5=C4C=CC=C5)=O)C=C3)NC2=CC=C16)C7=C(C=CC=C7)C6=O
MDL No. :MFCD00046964
InChI Key :UHOKSCJSTAHBSO-UHFFFAOYSA-N
Pubchem ID :6690

Safety of [ 81-77-6 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302
Precautionary Statements:P264-P270-P301+P312+P330-P501

Application In Synthesis of [ 81-77-6 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 81-77-6 ]

[ 81-77-6 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 50-00-0 ]
  • [ 130-14-3 ]
  • [ 532-02-5 ]
  • [ 81-77-6 ]
  • poly(formaldehyde-co-1-naphtalene sulfonic acid sodium salt-co-2-naphtalene sulfonic acid sodium salt); pigment blue 60; mixture of [ No CAS ]
YieldReaction ConditionsOperation in experiment
A one-liter flask equipped with a stirrer, thermometer, condenser and drying tube is charged with 200 ml concentrated (95-98%) sulfuric acid. 15 g C. I. Pigment Blue 60 (CIBANONE Blue RS PT 9860, Ciba Specialty Chemicals Inc.) are added at a temperature below 45oC and the mixture is stirred for 15 minutes at 40-45oC to completely dissolve the pigment. 10.7 g of a wet naphthalene sulfonic acid sodium salt presscake with a solid content of 58%, a mixture containing 80% 1-naphthalene sulfonic acid sodium salt and 20% 2- naphthalene sulfonic acid sodium salt (Shanghai Shen Li Chemical Factory) are added at a temperature below 50oC and the mixture is stirred for 10 minutes at 40-450C FOLLOWED by the rapid addition of 1.6 g para formaldehyde. The reaction mixture is stirred for one hour at 60-65oC then poured into 2.5 liter ice water. The dark bluish precipitate is stirred for 1 hour at 5-20oC, and then filtered. The dark bluish press cake is washed with water to a pH of 1.5-3. 0 and kept as presscake. About 0.5 g of the press cake are RESLURRIED in 20 ml hot water yielding a blue colored liquid which is filtered through paper to remove little aggregated material. The filtrate is blue and appears like a dye solution. However, the electron micrograph shows the indanthrone pigment in nanosize particle form with an average particle size of from 10 to 30 nm.
 

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