Description

Chromate, [2,4-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato][2,4-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-5-methyl-2-(4-sulfophenyl)-3H-pyrazol-3-onato]-, dihydrogen is a complex chromium-based azo dye compound, also known as Acid Black 172. This product is valued for its ability to provide deep, durable colorations with good light and wash fastness properties. It is primarily used by manufacturers in the textile and leather industries for dyeing and printing applications. Our supply ensures consistent quality and reliable performance for industrial-scale production.

Application

This specialized chromium complex dye is engineered for demanding coloration processes. Its primary and related applications include:

• Textile Dyeing: For dyeing wool, silk, and polyamide fibers to achieve deep black and navy shades.
• Leather Processing: Used in the dyeing of leather goods, providing rich color and good penetration.
• Ink Formulation: As a colorant component in the manufacture of specialty inks for various substrates.
• Paper Staining: For the coloration of specialty papers where high color strength is required.
• Research & Development: Serves as a chemical intermediate or reference standard in analytical and synthetic chemistry laboratories.

Basic Information

Item	Details
Product Name	Chromate, [2,4-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato][2,4-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-5-methyl-2-(4-sulfophenyl)-3H-pyrazol-3-onato]-, dihydrogen
CAS No.	72812-27-2
Molecular Formula	C32H20CrN8O12S
Molecular Weight	792.61 g/mol
Synonyms	Acid Black 172; C.I. 15711; Chromate(1-), [2,4-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)][2,4-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-5-methyl-2-(4-sulfophenyl)-3H-pyrazol-3-onato(3-)], hydrogen; Dihydrogen [2,4-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-onato][2,4-dihydro-4-[(2-hydroxy-4-nitrophenyl)azo]-5-methyl-2-(4-sulfophenyl)-3H-pyrazol-3-onato]chromate; Neolan Black WA; Airedale Black P2G; Telon Black KRL
EINECS	Contact for details

Quality Control

Our production of Acid Black 172 adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. All materials undergo rigorous testing, including spectrophotometric analysis for color strength and purity, and checks for heavy metal content. A Certificate of Analysis (COA) detailing specific test results is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (Color Strength)	≥ 95% (vs. Standard)
Moisture Content	≤ 5.0%
Ash Content	≤ 1.0%
Water Solubility	Conforms
Heavy Metals (as Pb)	≤ 50 ppm

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