Description

Mordant Orange 37 is a synthetic organic dye belonging to the mordant dye class, primarily used for coloring textiles and other materials. Its significance lies in its ability to form stable, wash-fast complexes with metal ions like chromium, resulting in vibrant and durable orange hues. This product is essential for industrial applications in the textile dyeing and leather finishing sectors, where consistent color quality and fastness properties are critical.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve orange shades with excellent light and wash fastness when used with appropriate metal mordants.
• Leather Coloring: Used in the finishing process to impart durable orange colors to leather goods.
• Wood Staining: Employed for coloring wood, providing a transparent, penetrating orange stain.
• Paper Coloring: Suitable for specialty paper products requiring specific, stable orange tones.
• Biological Staining (Histology): Potential use as a stain in microscopic techniques for tissue analysis, though specific protocols must be verified.
• Ink Formulation: A component in the manufacture of specialty inks for industrial marking or artistic purposes.

Basic Information

Product Name	Mordant Orange 37
CAS No.	6441-98-1
Molecular Formula	C16H11N3Na2O8S2
Molecular Weight	499.38 g/mol
Synonyms	Acid Orange 37; C.I. 18745; Mordant Orange 1; Eriochrome Orange R; Chrome Orange R; C.I. Mordant Orange 37; Sodium 4-[(2,4-dihydroxy-5-nitrophenyl)azo]naphthalene-1-sulfonate; 1-Naphthalenesulfonic acid, 4-[(2,4-dihydroxy-5-nitrophenyl)azo]-, disodium salt
EINECS	229-233-9

Quality Control

Our Mordant Orange 37 is manufactured under strict quality control protocols to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and fastness properties. A Certificate of Analysis (COA) detailing purity, physical properties, and performance specifications is provided with every shipment to guarantee it meets the requirements for industrial dyeing applications.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%
Fastness Properties (on wool)	Light: 5-6; Wash: 4-5

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