Description

Orchil Red is a synthetic organic dye belonging to the azine class, known for its vibrant red colorant properties. This compound is valued for its ability to impart consistent and stable coloration in specialized industrial applications. It is primarily utilized by manufacturers in the textile, biological staining, and specialty chemical synthesis sectors where precise color quality is critical.

Application

• Textile Dyeing: Used as a colorant for dyeing natural and synthetic fibers, particularly in niche or historical reproduction fabrics.
• Biological Staining: Serves as a histological stain in microscopy for visualizing cellular and tissue structures in laboratory settings.
• Indicator Chemistry: Employed in the formulation of pH indicators and other diagnostic chemical reagents.
• Specialty Ink Production: A key component in manufacturing inks for security printing, artistic applications, or specialty markings.
• Research & Development: Used as a standard or intermediate in chemical research, particularly in dye chemistry and photochemical studies.
• Educational Demonstrations: Applied in academic laboratories for teaching principles of dyeing and color chemistry.

Basic Information

Product Name	Orchil Red
CAS No.	6226-81-9
Molecular Formula	C28H31N2O6+ • Cl-
Molecular Weight	503.01 g/mol (for cation)
Synonyms	Orcein; Natural Red 28; C.I. 1242; Orchil; Orcin; Orceine; Orchil dye; Lacmus; 5,5'-[(3,3'-Dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[6-amino-4-hydroxy-2-naphthalenesulfonic acid] (related structure); Azine dye Red
EINECS	228-299-5

Quality Control

Our Orchil Red is produced and tested under a rigorous quality management system to ensure batch-to-batch consistency and performance. Each lot is analyzed for key parameters including color strength, purity, and solubility. A comprehensive Certificate of Analysis (COA) documenting these results is provided with every shipment 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 a controlled room temperature (15-25°C). Keep away from heat sources and incompatible materials.

Specification

Item	Specification
Appearance	Dark red to brownish-red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Loss on Drying	Max. 5.0%
Solubility	Soluble in water and ethanol
Ash Content	Max. 1.0%
Heavy Metals (as Pb)	Max. 20 ppm

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