Organic Intermediate Color Paste for Paper Making

Product Description

Product Description
 

Basic Information

• CAS No.: 1325-37-7
• C.I. Number: 40000
• Molecular Formula: C16H10N2Na2O7S2
• Molecular Weight: 452.37

Properties

• Appearance: Usually a uniform brown powder. When dissolved in water, it presents a reddish-yellow to reddish-brown color; slightly soluble in fibrin, and insoluble in other organic solvents.

Chemical Properties

• It has a certain resistance to acids and alkalis. In aqueous solution:
  • Turns olive-yellow when in contact with concentrated hydrochloric acid;
  • Forms a golden-orange precipitate when reacting with concentrated sodium hydroxide;
  • Shows a green color in the presence of copper ions;
  • Turns slightly dark yellow when exposed to iron ions;
  • Exhibits a pale yellow color when in contact with zinc ions and ammonium ions.

Uses

• Mainly used for dyeing fibers such as cotton, linen, viscose rayon, acetate fiber and jute. It is also applicable for coloring inks, leather and paper.

Safety

• Hazard Code: Xi (Irritant)
• Risk Phrases: R36/37/38 (Irritating to eyes, respiratory system and skin)
• Safety Phrases:
  • S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
  • S36: Wear suitable protective clothing.

Key Terminology Notes

• C.I. Number: Abbreviation for "Color Index Number", an international standard classification system for dyes, pigments and colorants (managed by the Society of Dyers and Colourists, SDC, and the American Association of Textile Chemists and Colorists, AATCC), used to uniquely identify color products.
• Viscose rayon: A type of regenerated cellulose fiber, commonly used in textiles due to its soft texture and good moisture absorption.
• Risk Phrases (R-phrases) / Safety Phrases (S-phrases): Legacy European Union hazard communication terms (now gradually replaced by GHS labels, but still widely used in industry) to indicate potential risks and corresponding protective measures.

Specification 
 
Yellow solution,can be used with any water dilution ratio,fiber to the high lignin content pulp or used repeatedly with good dyeing rate,long time storage stability,excellent color fastness,color paper,leather box for Hanging noodles version of paper,kraft paper packaging paper.

 

Appearance	Yellow liquid
Strength	100±3
The viscosity of 25 DEG C=MPAs	50
Proportion of 20 degree	1.05-1.25
PH value	8-10.5
Insoluble matter	0.5

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