Description

Calcium Hydrogen 3-[(4-Hydroxy-3-Sulphonatophenyl)(4-Oxo-3-Sulphonato-2,5-Cyclohexadien-1-Ylidene)Methyl]Benzoate is a high-purity, water-soluble colorant belonging to the triphenylmethane dye class, known for its brilliant and stable hue. This compound is valued for its excellent tinctorial strength and compatibility in complex formulations, providing reliable and consistent coloration. It is primarily utilized by manufacturers in the pharmaceutical, cosmetic, and specialty chemical industries where precise and safe coloring is a critical requirement.

Application

• Pharmaceutical Coloring Agent: Used in the coating of tablets and capsules, as well as in liquid oral suspensions and syrups.
• Cosmetic and Personal Care Formulations: Imparts color to soaps, shampoos, creams, and other topical products.
• Industrial Dye for Specialty Chemicals: Employed in the coloration of inks, coatings, and detergents.
• Laboratory Reagent and Biological Stain: Serves as a staining agent in microbiological and histological applications.
• Food Contact Material Colorant: Suitable for coloring packaging materials and polymers intended for food contact (subject to specific regional compliance).

Basic Information

Product Name	Calcium Hydrogen 3-[(4-Hydroxy-3-Sulphonatophenyl)(4-Oxo-3-Sulphonato-2,5-Cyclohexadien-1-Ylidene)Methyl]Benzoate
CAS No.	63494-80-4
Molecular Formula	C22H14CaO11S2
Molecular Weight	566.53 g/mol
Synonyms	Calcium Hydrogen 3-[(4-Hydroxy-3-Sulphonatophenyl)(4-Oxo-3-Sulphonato-2,5-Cyclohexadien-1-Ylidene)Methyl]Benzoate; Calcium Hydrogen 3-[(4-Hydroxy-3-Sulfonatophenyl)(4-Oxo-3-Sulfonato-2,5-cyclohexadien-1-ylidene)methyl]benzoate; FD&C Violet No. 2 Calcium Lake; Acid Violet 43 Calcium Salt; C.I. 60730; D&C Violet No. 2; Violet 2 Calcium Lake
EINECS	Contact for details

Quality Control

Our production of Calcium Hydrogen 3-[(4-Hydroxy-3-Sulphonatophenyl)(4-Oxo-3-Sulphonato-2,5-Cyclohexadien-1-Ylidene)Methyl]Benzoate adheres to stringent quality management systems. Each batch is tested against rigorous in-house specifications to ensure high purity, color strength, and batch-to-batch consistency. Relevant quality standards, including those for pharmaceutical (USP/EP) and cosmetic use, are followed. A comprehensive Certificate of Analysis (COA) documenting identity, purity, and heavy metal content 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark violet to purple powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0

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