Chemical World

Naphthol AS/BO|Naphthol 4

Naphthol AS/BO

C.I Naphthol 4(37560)

Azoic Dyes

Structural formula:

Molecular formula: C₂₁H₁₅O₂N

Molecular weight: 313.37

Physical and chemical properties:

Appearance is gream-colored powder, insoluble in water. Sodium in xylene. It shows yellow colored when in caustic solution. Melting point: 222-223°C.

Specification:

Appearance: light cream-colored brown uniform powder

Shade: similar to the standard

Strength: 100

I.M.P. of dry product: ≥217°C

Insolubles in alkali solution: ≤0.5%

Moisture content: ≤0.3%

Fineness: ≤5%(residue through 60mesh)

Application: For cotton dyeing and printing, intermediate for organic pigments.

Packing: In 25kgs net in woven bags, polywood drums or iron drums all lined with plastic bag.

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Naphthol AS/D|Naphthol 18

Naphthol AS/D

C.I Naphthol 18(37520)

Azoic Dyes

Structural formula:

Molecular formula: C₁₈H₁₅O₂N

Molecular weight: 277.34

Physical and chemical properties:

Appearance is cream-colored yellow uniform powder, initial melting point of dry product 193°C. Insoluble in water. It is yellow transparent solution when soluble in sodium hydroxide. It can couple with diazoic salts of aromatic amine series to produce insoluble azoic dyes.

Specification:

Appearance: Light yellow powder

Shade: similar to the standard

Strength: 100

Content: ≥98.5%

I.M.P. of dry product: 193°C

Insolubles in alkali solution: ≤0.2%

Content of Bon acid: ≤0.1%

Fineness: ≤5%(residue through 60mesh)

Application: For manufacturing azo dyes, dyeing and printing cotton fibre, viscose fibre and synthetic fibre.

Packing: In 25kgs woven bags, kraft paper bags, polywood drums and iron drums all lined with plastic bag.

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Naphthol AS|Naphthol 2

Naphthol AS

C.I Naphthol 2(37505)

Azoic Dyes

Structural formula:

Molecular formula: C₁₇H₁₃O₄N₂

Molecular weight: 261.31

Physical and chemical properties:

Appearance is light cream-colored uniform powder. Initial melting point is more than 247°C. 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.

Specification:

Appearance: light yellow cream-colored powder

Content: ≥98.5%

I.M.P. of dry product: ≥247.2°C

Insolubles in alkali solution: ≤0.1%

Shade after coupled with scarlet red base G: similar

Strength after coupled with scarlet red base G: 100±5

Content of Bon acid: ≤0.1%

Fineness: ≤5%(residue through 60mesh)

Application: For manufacturing organic pigments and dyeing and printing cotton fibre, viscose fibre and a part of synthsis fibre.

Packing: In 25kgs net in iron drums, woven bags, kraft paper bags, fibre drums, all lined with plastic bag.

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Rhodamine 6GCP-N|Basic Red 1:1

Rhodamine 6GCP-N(Basic Red 1:1)

Basic Dyes

Specification:

CAS No.: 3068-39-1

Appearance: powder

PH: 2.5

Opticaidensity(%): 100±5

Shade: Approximatetothe standard

Insolubles: <0.5%

Purity: ≥95%

Application: Of the same category with Rhodamine 6GCP, but more soluble in low-polarity organic solution. Applicadle in like manner but selective on solvent type.

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Rhodamine 6GCP|Basic Red 1

Rhodamine 6GCP(Basic Red 1)

Basic Dyes

Specification:

CAS No.: 989-38-8

Appearance: Granule powder

PH: 3.2

Opticaidensity(%): 100±5

Shade: Approximatetothe standard

Insolubles: <0.5%

Purity: ≥95%

Application: Soluble in alcohol and organic solvent. Red and yellowish in color. Applicable to dyeing of lake pigment, leather and paper.

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Tags: Basic Red 1, Rhodamine 6GCP

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