Description

C.I. Acid Orange 172 is a high-performance synthetic dye belonging to the acid dye class, valued for its strong colorfastness and excellent solubility in aqueous systems. This product is engineered to deliver consistent, vibrant orange hues with superior leveling properties and good light and wash fastness. It is primarily used by manufacturers in the textile, leather, and paper industries seeking reliable and efficient dyeing solutions for polyamide and protein-based fibers.

Application

• Textile Dyeing: Primary application for dyeing nylon, wool, and silk fibers, providing bright and durable orange shades.
• Leather Finishing: Used in the coloration of leather goods, offering good penetration and uniform color.
• Paper Staining: Employed for tinting specialty papers, including decorative and packaging materials.
• Ink Formulation: A colorant component in the manufacture of inks for various printing applications.
• Biomolecule Staining: Potential use in laboratory settings for staining proteins or other biological materials in analytical techniques.

Basic Information

Product Name	C.I. Acid Orange 172
CAS No.	134687-49-3
Molecular Formula	C32H24N8Na2O8S2
Molecular Weight	774.75 g/mol
Synonyms	Acid Orange 172; C.I. 18272; Acid Leather Orange RL; Nylosan Orange E-RL; Telon Orange RL; Erionyl Orange R-FG; Acid Orange RL; Sodium 4,4'-(1,3,4-thiadiazole-2,5-diyl)bis[(3-methyl-4-oxo-5-sulfo-4,5-dihydro-1H-pyrazol-1-yl)azo]dibenzenesulfonate
EINECS	Contact for details

Quality Control

Our C.I. Acid Orange 172 is produced under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting purity, heavy metal content, and other relevant specifications are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Orange to Reddish-Orange Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 30.0%
Heavy Metals (as Pb)	≤ 50 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.