Description

Orange I is a synthetic azo dye widely recognized for its vibrant orange color. This compound is valued for its consistent color strength and stability, making it a reliable choice for demanding industrial applications. It serves as a critical colorant and indicator in sectors such as textiles, biological research, and analytical chemistry.

Application

• As a biological stain for microscopic analysis in histology and cytology.
• Used as a pH indicator in various laboratory and analytical procedures.
• Employed as a colorant for textiles, particularly for dyeing silk and wool fibers.
• Acts as a model compound in environmental studies for azo dye degradation research.
• Utilized in the manufacture of inks and specialty printing applications.
• Applied in educational and research laboratories for teaching and experimental protocols.

Basic Information

Product Name	Orange I
CAS No.	523-44-4
Molecular Formula	C16H11N2NaO4S
Molecular Weight	350.32 g/mol
Synonyms	Acid Orange 20; Tropaeolin OO; Sodium 4-[(2,4-dihydroxyphenyl)azo]benzenesulfonate; C.I. 14600; Orange I sodium salt; 4-[(2,4-Dihydroxyphenyl)azo]benzenesulfonic acid sodium salt; Tropaeolin O; Wool Orange
EINECS	208-341-8

Quality Control

Our Orange I is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets high-purity standards for consistent performance. Certificates of Analysis (COA) detailing purity, identity, and other critical parameters 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 incompatible materials and sources of heat.

Specification

Item	Specification
Appearance	Orange to brownish-orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0

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