Description

C.I. Acid Orange 36 is a synthetic azo dye belonging to the acid dye class, widely recognized for its vibrant orange hue and good lightfastness. This dye is valued for its strong affinity to protein fibers like wool, silk, and nylon, providing excellent color yield and wash-fastness. It is a critical component for manufacturers in the textile, leather, and paper industries seeking durable and vivid coloration.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and polyamide (nylon) fibers, producing bright orange shades with good leveling properties.
• Leather Finishing: Used in the coloration of leather goods, offering good penetration and uniform color for products like upholstery, bags, and apparel.
• Paper Staining: Employed in the production of specialty papers, including decorative papers and packaging materials, to achieve consistent orange tones.
• Ink Formulation: A pigment source in the manufacture of inks for various printing applications, valued for its color strength.
• Biological Staining (Histology): In some formulations, it can be used as a stain in microscopic analysis for tissue samples.
• Wood Staining: Applied to impart an orange color to wood surfaces in furniture and decorative woodworking.

Basic Information

Product Name	C.I. Acid Orange 36
CAS No.	12221-50-0
Molecular Formula	C16H11N4NaO4S
Molecular Weight	378.34 g/mol
Synonyms	Acid Orange 36; Acid Leather Orange PR; C.I. 18050; Acid Orange A; Acid Orange PR; Acid Fast Orange A; Acid Leather Orange A; Mordant Orange 1; Sodium 4-[(2,4-dihydroxyphenyl)azo]benzenesulfonate
EINECS	235-409-5

Quality Control

Our production of C.I. Acid Orange 36 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and conformance to specification is provided with each shipment.

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 and incompatible materials.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Conforms
pH (1% Solution)	6.0 - 8.0
Ash Content	Max. 1.0%

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