Description

2-(2,4,5,7-Tetrabromo-3,6-Dihydroxyxanthen-9-Yl)Benzoic Acid, Lead Salt is a specialized organometallic pigment and colorant salt derived from a brominated xanthene dye. This compound is valued for its intense color properties and stability, making it a critical component in high-performance applications where consistent pigmentation is required. It is primarily sought after by manufacturers in the plastics, coatings, and specialty inks industries for producing vibrant, durable colors.

Application

• Plastics and Polymer Coloring: Used as a high-stability pigment for coloring engineering plastics, PVC, and synthetic fibers.
• Industrial Coatings and Paints: Imparts durable and vibrant color to industrial paints, automotive coatings, and protective finishes.
• Specialty Printing Inks: A key component in high-quality inks for packaging, security printing, and decorative applications.
• Masterbatch Production: Serves as a concentrated colorant for creating pigment masterbatches used in various polymer processing.
• Research and Chemical Synthesis: Utilized as a reagent or intermediate in the development of novel dyes and functional materials.

Basic Information

Product Name	2-(2,4,5,7-Tetrabromo-3,6-Dihydroxyxanthen-9-Yl)Benzoic Acid, Lead Salt
CAS No.	1326-05-2
Molecular Formula	C20H8Br4O5Pb
Molecular Weight	933.91 g/mol
Synonyms	Lead tetrabromofluorescein; C.I. Pigment Red 90:1; Tetrabromofluorescein lead salt; Eosin lead salt; 2',4',5',7'-Tetrabromo-3,6-dihydroxy-spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, lead salt; Eosin Y, lead salt; Bromoeosin lead salt; D&C Red No. 90, Aluminum Lake (related compound)
EINECS	215-389-0

Quality Control

Our production of 2-(2,4,5,7-Tetrabromo-3,6-Dihydroxyxanthen-9-Yl)Benzoic Acid, Lead Salt adheres to stringent quality protocols to ensure batch-to-batch consistency and performance. Each lot is analyzed for critical parameters including purity, heavy metal content (excluding lead as part of the structure), and color strength. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

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). Keep away from strong alkalis and incompatible organic solvents. Due to its composition, ensure proper handling procedures for lead-containing compounds are followed.

Specification

Item	Specification
Appearance	Red to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 1.0%
Heavy Metals (as Pb, total)	Reported on COA
Color Strength	± 5% of standard

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