Description

Ponceau Sx is a synthetic, water-soluble azo dye widely recognized for its vibrant red color. This compound is valued for its strong tinctorial strength and good stability in various formulations. It serves as a critical colorant in the food, cosmetic, and biological staining industries, where precise and consistent coloration is essential for product quality and analytical accuracy.

Application

• Food Coloring Agent: Used to impart a stable red color in candies, beverages, and confectionery products.
• Cosmetic & Personal Care: Employed as a color additive in lipsticks, soaps, and other cosmetic formulations.
• Biological Staining: Functions as a histological stain for proteins on nitrocellulose membranes (e.g., in Western blotting) and for general tissue staining.
• Ink & Dye Manufacturing: Acts as a key pigment in the production of inks, textile dyes, and paper colorants.
• Pharmaceuticals: Used as a colorant in tablet coatings and liquid medicinal preparations for product identification.
• Laboratory Reagent: Serves as an analytical reagent and pH indicator in various chemical and biochemical assays.

Basic Information

Product Name	Ponceau Sx
CAS No.	4548-53-2
Molecular Formula	C22H12N4Na2O7S2
Molecular Weight	538.46 g/mol
Synonyms	Acid Red 112; C.I. 27195; Food Red 1; Ponceau SX; FD&C Red No. 4; 2-Naphthalenesulfonic acid, 7-hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-, disodium salt; Brilliant Ponceau 5R; New Coccine
EINECS	224-909-9

Quality Control

Our Ponceau Sx is manufactured under a strict quality management system. Each batch is tested to ensure compliance with relevant standards such as FCC (Food Chemicals Codex) for food-grade applications and meets specifications for color strength, purity, and heavy metal content. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles 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 room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 85.0% (as colorant)
Loss on Drying	≤ 10.0 %
Water Insoluble Matter	≤ 0.2 %
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm
Lead (Pb)	≤ 10 ppm

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