2. Rhodamine B
    1) C.I.: C.I BASIC VIOLET 10(45170)
    2) Structural formula:
    3) Molecular Formula: C28H31O3N2Cl
    4) Molecular Weight: 478.5
    5) Physical and chemical properites:
      Appearance is glisten bright green flaky crystal. Soluble in hot water and the solution shows pink. It is leuco precipitate when dissolved in sodium hydroxide solution.
    6) Specification:

    Appearance Bright green glisten uniform powder
    Shade Similar-Slight(Comparision with standard sample)
    Strength 100
    Insolubles 0.5%
    Fineness(through sift of 20 mesh) 100% passing through

    7) Application:

      For dyeing of paper, acrylic fibres, silk, leather and feather; Also can be used in food and analytical reagent of some metals.
    8) Packing: 25Kg net in iron drum lined with plastic bag.

3. Naphthol AS
    1) C.I.: C.I. Naphthol 2(37505)
    2) Structural formula:
    3) Molecular Formula: C17H13O2N
    4) Molecular Weight: 261.31
    5) Physical and chemical properties:
      Appearance is light cream-colored uniform powder. Initial melting point is more than 247. Soluble in alcohol and sodium hydroxide solution. And its solution is yellow clear liquid. It can couple with diazo salts of aromatic anilines to produce insoluble azoic dyes.
    6) Specification:

      Grade A Grade B
    Appearance Light yellow cream-colored or white cream-colored powder
    Contact 98.5% 98%
    I.M.p 247.2 247
    Insolubles in alkali solution 0.1% 0.2%
    Shade after coupled
    with scarlet red base G    		 Similar Similar
    Strenght after coupled
    with scarlet red base G    		 100¡À5  
    Content of Bon Acid 0.1% 0.1%

    7) Application

      For manufacturing orgnic pigments and dyeing and printing cotton fibre, viscose fibre and a part of synthsis fibre.
    8) Packing: 25Kg net in iron drum, woven bag, kraft paper bag, fibre drum, all lined with plastic bag.

4. Naphthol AS/D
    1) C.I.: C.I. Naphthol 18(37520)
    2) Structural formula
    3) Molecular Formula£ºC18H15O2N
    4) Molecular Weight: 277.34
    5) Physical and chemical properties:
      Cream-colored yellow uniform powder, initial melting point of dry product 193. Insoluble in water. It is yellow transparent solution when soluble in sodium hydroxide. It can couple with diazoic salt of aromatic amine series ot produce insoluble azoic dyes.
    6) Specifications

      Grade A Grade B
    Appearance Light yellow powder
    Shade Similar(comparison with the standard) Similar(comparison with the standard)
    Strenght 100 100
    Contact 98.5% 96.5%
    I.M.P of dry product 193 190
    Insolubles in alkali solution 0.2% 0.4%
    Content of Bon acid 0.1%
    Fineness(resdiue on
    sieve of 60 mesh)    		 5%  

    7) Application:

      For manufactureing azo dyes, dyeing and printing cotton fibre, viscose fibre and synthetic fibre.
    8) Packing: Woven bag, paper bag, polywood drum and iron drum all lined with plastic bag, net weight 25Kg.

5. Naphthol AS/PH
    1) C.I.: C.I. Naphthol 14(37558)
    2) Structural formula:
    3) Molecular Fromula: C19H17O3N
    4) Molecular weight: 307.35
    5) Physical and chemical properties:
      The apperance is buff powder, Insoluble in water and solium carbonate.
    6) Specification:

    Appearance buff powder
    Purity 98%
    Melting point 157-158
    Insolubles in alkali solution 0.5%

    7) Application:

      It is used as grounding and printing of cotton goods.
    8) Packing: 25Kg net in iron drum and woven bag lined with plastic bag.

6. Naphthol AS/OL
    1) C.I.: C.I Naphthol 20(37530)
    2) structural formula:
    3) Molecular Formula: C18H15O3N
    4) Molecular Weight: 293.34
    5) Phsical and chemical properties:
      The appearance is buff brown uniform powder. Initial melting point is 167. Insoluble in water. Soluble in alcohol. It is yellow transparent solution is sodium hydroxide solution.
    6) Specification:

      Grade A Grade B
    Appearance Brown to cream-colored uniform powder Brown to cream-colored uniform powder
    Shade Similar to the standard Similar to the standard
    I.M.P of dry product 160 159.5
    Contact 98% 97%
    Content of bon acid 0.1% 0.3%
    Insolubles in alkali solution 0.3% 0.6%
    Fineness(resdiue on sieve of 60 mesh) 5% 5%

    7) Application:

      For producing insoluble azoic dystuff and dyeing of cotton fibre and viscose fibre.
    8) Packing: Woven bag, kraft paper bag, fibre drum or iron drum all package lined with plastic bag net

7. Naphthol AS/BO
    1) C.I.: C.I. Naphthol 4(37560)
    2) Structural formula:
    3) Molecular Formula: C21H15O2N
    4) Molecular weight: 313.37
    5) Physical and chemical properties:
      Gream-colored powder, insoluble in water. Soluble in xylene. It shows yellow colored when caustic solution, melting point: 222-223.
    6) Specification:

    Appearance light cream-colored brown uniform powder
    Shade Similar to the standard
    Strenght 100
    Initial M.P. of dry product 217
    Insolubles in alkali solution 0.5%
    Moisture content 0.3%
    Fineness(residue on sieve of 60 mesh) 5%

    7) Application:

      For cotton dyeing and printing, intermediate for organic pigments.
    8) Packing: 25Kg net in woven bag, polywood drum.

8. Naphthol AS/BS
    1) C.I.: C.I Naphthol 17(37515)
    2) Structural:
    3) Molecular formula: C17H12O4N2
    4) Molecular Weight: 308.29
    5) Phsical and chemical prperties:
      The appearance is green powder, insoluble in water and sodium carbonate, soluble in acetic acid, showing yellow in sodium hydroxide solution. melting point: 246-247.
    6) Specification:

    Appearance pale yellow green uniform
    I.M.P of dry product 242
    Shade similar-slight(comparision with the standard)
    Strength 100
    Content 98%
    Insolubes in alkali solution 0.5%
    Fineness(residue on sieve of 60 mesh) 5%

    7) Application:

      The grounder of dyeing & printing for cottons and the intermediates for rapidcolors.
    8) Packing: Woven bag, draft paper bag, iron drum and fibre drum all lined with plastic bag. net wieght: 25Kg.