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HomeProduct name listDirect Blue 78

Direct Blue 78

  • CAS NO.:2503-73-3
  • Empirical Formula: C42H25N7Na4O13S4
  • Molecular Weight: 1055.90608
  • MDL number: MFCD00230743
  • EINECS: 219-708-8
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-05-09 09:30:37
Direct Blue  78 Structural

What is Direct Blue 78?

Preparation

2-Aminobenzene-1,4-disulfonic acid diazo, and 8-Aminonaphthalene-2-sulfonic acid first coupling, its product to diazo, and Naphthalen-1-amine second coupling, again diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid third coupling.

Flammability and Explosibility

Not classified

Properties and Applications

blue. Soluble in water for blue, solubility of 15 g/L (60 ℃), 30 g/L (97 ℃), soluble in soluble fiber element, slightly soluble in alcohol, insoluble in other organic solvents. The strong sulfuric acid in Red sauce for galleries to, diluted Red sauce for; In the light of nitric acid for palm gray. The dye solution to join strong hydrochloric acid for red light blue; Add thick sodium hydroxide solution for red light purple. Water-soluble good, colored light to blue. Dye in bath of copper, iron ion colored light basic unchanged. SDC classification for class B. Neutral white is very good, alkaline white. Mainly used for cotton or viscose dyeing and printing directly, and disperse dyestuffs with bath dyeing polyester/cotton blended fabric. Can also be used for paper, leather and biological dyeing.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 4 4-5 4-5 2-3 2-3
AATCC 5 4-5 5 3 3

Properties of Direct Blue 78

Density  1.383[at 20℃]
vapor pressure  0Pa at 25℃
Water Solubility  10g/L at 20℃
EPA Substance Registry System C.I. Direct Blue 78, tetrasodium salt (2503-73-3)

Safety information for Direct Blue 78

Computed Descriptors for Direct Blue 78

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