Description

Acid Red 27 is a synthetic, water-soluble azo dye widely recognized for its vibrant red color. It is a critical component for imparting consistent and durable coloration across various industrial and consumer products. This dye is essential for manufacturers in the textile, paper, and ink industries, as well as for specialized applications in biological staining and cosmetics where a safe, approved colorant is required.

Application

• Textile Dyeing: Used for coloring wool, silk, and nylon fibers, providing good wash and light fastness.
• Paper Coloring: Imparts a bright red hue to paper products, including tissues, packaging, and specialty papers.
• Ink Manufacturing: A key pigment for writing inks, stamp pad inks, and other aqueous-based ink formulations.
• Biological Staining: Employed in histology and microscopy as a staining agent for cell structures.
• Cosmetics & Personal Care: Used as a color additive in soaps, shampoos, and other cosmetic products where regulations permit.
• Leather Dyeing: Applied for coloring leather goods, offering a range of red shades.
• Food Contact Materials: Suitable for coloring packaging and other materials intended for food contact, subject to local regulatory compliance.

Basic Information

Product Name	Acid Red 27
CAS No.	915-67-3
Molecular Formula	C18H14N2Na2O7S2
Molecular Weight	480.42 g/mol
Synonyms	Amaranth; FD&C Red No. 2; E123; C.I. 16185; Acid Red 27 disodium salt; Trisodium 3-hydroxy-4-[(4-sulfo-1-naphthyl)azo]-2,7-naphthalenedisulfonate; 1-(4-Sulfo-1-naphthylazo)-2-naphthol-3,6-disulfonic acid trisodium salt
EINECS	213-022-2

Quality Control

Our Acid Red 27 is produced under a strict quality management system. Each batch is tested to ensure it meets high-purity standards and consistent color strength. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and heavy metal content, supporting compliance with relevant industry and regulatory guidelines.

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	Dark red to maroon powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 85% (as dye content)
Loss on Drying	≤ 10.0 %
Sulfated Ash	≤ 30.0 %
Water Insoluble Matter	≤ 0.2 %
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm

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