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  •  
    Intermediates
    Yellow Pigments
    Red Pigments
    Bluish Green Pigments
    Inorganic Pigments
    Oil-soluble Pigments
    Intermediate

    Product Name
    Appearance
    MP
    Assay
    H-ACID(DRY POWDER)
    white powder
     
    ≥ 85%
    H-ACID(DRY POWDER)
    white paste
     
    ≥ 42%
    3.3-DICHLOROBENZIDINE
    HYDROCHLORIDE
    white crystal
     
    ≥ 72%
    FAST SCARLET BASE G
    C.I.AZOIC DIAZO COMPONENT 12
    light yellow powder
    103°C
    ≥ 88%
    FAST SCARLET BASE b
    C.I.AZOIC DIAZO COMPONENT 5
    orange yellow powder
    137°C
    ≥ 98%
    FAST SCARLET BASE GL
    C.I.AZOIC DIAZO COMPONENT 8
    orange red powder
    113°C
    ≥ 98.5%
    FAST BORDEAUX GP BASE
    C.I.AZOIC DIAZO COMPONENT 1
    orange red powder
    120°C
    ≥ 98%
    1-AMINO 8-NAPHTHALl, 3,6-DISULPHONIC ACID      
     

    1-Amino 8-naphthal, 3,6-disulphonic Acid

    Structural Formula:
    Molecular Formula: C10H8O7NS2Na
    Molecular Weight: 341.3

    Physical and Chemical Properties:

    (1)the solubility in water is 0.17% (20°C);
    (2)the solubility in water is 2.40% (60C°C);
    (3)insoluble in alcohol and aether;
    (4)soluble in solutions of alkali, sodium carbonate and ammonia;
    (5)the dilute solutiono f H-acid appears blue red fluorescence;
    (6)H-acid can couple in both acid and alkali condition;
    (7)a. the alkali solution of H-acid fast becomes dark in air; b. to produce yellow crystalline diazo compound when reacting with nitrous acid; c. diazo compounds are soluble in soda and alkali solution; d. appears light violet when dissolving in soda solution, appears dark green when dissolving in alkali solution.

    Main Uses: used to produce all kinds of azo dyes, used to dye wools, textiles, papers and paper textiles; also used to synthesize pharmaceutical.

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