Description

Aluminum(+3) Cation: 6-Oxido-5-(4-Sulfonatophenyl)Diazenyl-Naphthalene -2-Sulfonate is a high-purity, water-soluble aluminum lake pigment, also known as Aluminum Lake of Acid Red 52. This compound is valued for its exceptional color strength, stability, and compatibility, making it a critical component for creating vibrant, non-bleeding colors. It is primarily used by manufacturers in the pharmaceutical, cosmetic, and food industries seeking reliable and compliant colorants for tablets, coatings, and decorative applications.

Application

• Pharmaceutical Tablets & Capsules: Used as a colorant in film coatings and for the direct coloring of tablet cores, providing excellent opacity and batch-to-batch consistency.
• Cosmetic Formulations: Imparts stable pink to red hues in lipsticks, blushes, eye shadows, and other decorative makeup products.
• Food Supplement Coatings: Applied in the coating of nutritional supplements and vitamin tablets where a bright, appealing color is required.
• Industrial Inks & Pigments: Serves as a specialized pigment in certain printing inks and artist colors requiring good lightfastness and solubility properties.
• Biomedical Staining: Potential use as a histological stain or marker in laboratory research due to its chromophoric properties.

Basic Information

Product Name	Aluminum(+3) Cation: 6-Oxido-5-(4-Sulfonatophenyl)Diazenyl-Naphthalene -2-Sulfonate
CAS No.	68921-43-7
Molecular Formula	C22H14AlN3O8S2
Molecular Weight	547.48 g/mol
Synonyms	Acid Red 52 Aluminum Lake; C.I. 45100 Aluminum Lake; Aluminum Lake of Acid Red 52; Eosin Y Aluminum Lake; Phloxine B Aluminum Lake; [6-Oxo-5-[(4-sulfophenyl)diazenyl]-2-naphthalenesulfonato(3-)]aluminum; Aluminum 2-(2,4,5,7-tetrabromo-6-oxido-3-oxo-3H-xanthen-9-yl)benzoate (common mis-association).
EINECS	Contact for details

Quality Control

Our Aluminum Lake of Acid Red 52 is manufactured under strict quality management systems. Each batch is tested to ensure compliance with relevant purity and safety standards for its intended applications, including those for pharmaceuticals and cosmetics. A comprehensive Certificate of Analysis (COA) detailing identity, assay, heavy metal limits, and other critical parameters is provided with every shipment.

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 strong oxidizing agents and excessive heat. The container must be kept tightly sealed to protect the contents from moisture.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Assay (Aluminum Content)	4.5 - 6.0 %
Loss on Drying	≤ 10.0 %
Residue on Ignition	25.0 - 35.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm
Water Solubility	Practically insoluble

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