Description

Acid Red 87 is a synthetic, water-soluble xanthene dye known for its vibrant pink to red color. This high-purity colorant is valued for its strong tinctorial strength and good solubility in aqueous and certain solvent systems. It serves as a critical component for manufacturers in the pharmaceutical, cosmetic, and specialty chemical industries seeking reliable and consistent coloring agents.

Application

• Pharmaceutical Coloring: Used as a colorant in tablet coatings, capsules, syrups, and topical ointments.
• Cosmetic and Personal Care: Imparts color to lipsticks, soaps, shampoos, and other beauty products.
• Biological Staining: Employed as a histological stain in laboratory settings for microscopic analysis.
• Ink Manufacturing: A key pigment for specialty inks, including those for security printing and flexographic applications.
• Food Contact Materials: Used to color packaging materials and other articles where direct food additive use is not intended.
• Industrial Dyeing: Applied for coloring paper, leather, and certain types of textiles.

Basic Information

Product Name	Acid Red 87
CAS No.	548-26-5
Molecular Formula	C20H2Br4Na2O5
Molecular Weight	691.86 g/mol
Synonyms	Eosin Y; Eosin Yellowish; Bromoeosin; Acid Red 87; C.I. 45380; Eosin Y, water soluble; 2',4',5',7'-Tetrabromofluorescein disodium salt; Eosin Yellowish-(YS)
EINECS	208-953-6

Quality Control

Our Acid Red 87 is manufactured under a strict quality management system. Each batch is tested to ensure it meets stringent specifications for identity, purity, and color strength. A comprehensive Certificate of Analysis (COA) detailing assay, heavy metal content, and other critical parameters is provided with every shipment to guarantee supply reliability and batch-to-batch consistency for your formulations.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Red to brownish-red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 85.0%
Loss on Drying	Max. 10.0%
Sulfated Ash	Max. 30.0%
Heavy Metals (as Pb)	Max. 20 ppm
Water Solubility	Freely soluble
Absorbance (λ max)	517 - 521 nm

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