Tianjin Yueguo Chemical  Co., Ltd

  • DSD Acid
  • Optical brightener CBS-X (FBA 351)
  • Sulfanilic acid
  • Sodium sulphanilate
  • Cyanuric chloride
  • Aniline
  • Acid black 210
  • Acid black 234
  • Products

    DSD Acid

    【Chemical name】: 4,4-Diaminostilbene-2,2-disulfonic acid
    【Commodity name】: DSD Acid
    【Structural Formula】:

    【Molecular Formula】: C14H14N2O6S2
    【Molecular Weight】: 370.4
    【Physical and chemical properties】:
    1) Light yellow paste or powder, soluble in alcohol and ether insoluble in water, readily soluble in a aqueous solution of alkali.
    2) Easy be oxidated to red in air, it has properties of aromatic acid and aromatic amine.
    【Specifications】

    Item
    Specifications
    Appearance
    Light yellow paste or powder
    Total Amido Value
    45.0% min
    Total drying Amido Value
    95.0% min
    Alkali Insolubility(paste)
    0.08% max
    Alkali Insolubility(powder)
    0.10% max
    Benzyl Content
    0.25% max

    【Main Usage】: Used in manufacture of fluorescent whitening agent. Direct chrysophenine G. Direct yellow R and used asinsect preventive ect.
    【Packing】: For powders 25kg net poly-woven bags or as the customers requirements.
    For paste 40kg net poly-woven bags or as the customers requirements.