Description

Maddercolour CAS NO 12640-73-2 is a high-purity, natural dye extract derived from the roots of the *Rubia tinctorum* plant, valued for its distinctive and stable red hue. This compound is essential for industries requiring authentic, non-synthetic colorants with historical and artisanal significance. It is primarily sought after by manufacturers in the natural textile dyeing, artist pigments, cosmetics, and food colorant sectors where provenance and natural sourcing are critical.

Application

• Natural Textile Dyeing: Used for coloring wool, silk, and cotton, prized for its rich, fast red shades in sustainable fashion and artisanal fabric production.
• Artist Pigments & Inks: A key component in high-quality watercolors, oil paints, and printing inks for fine arts and restoration work.
• Cosmetics & Personal Care: Employed as a natural colorant in lipsticks, blushes, and other makeup products where synthetic dyes are undesirable.
• Food & Beverage Coloring: Used as a natural food additive (where approved) to provide red and pink hues to confectionery, beverages, and dairy products.
• Histological Staining: Applied in biological and medical laboratories as a staining agent for tissue samples.
• Wood & Leather Staining: Provides a traditional, warm red finish for fine woodworking and leather goods.

Basic Information

Product Name	Maddercolour CAS NO 12640-73-2
CAS No.	12640-73-2
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Madder Lake; Madder Red; Alizarin Red; Natural Red 8; CI 75330; Rose Madder; Rubia tinctorum extract; Garancine
EINECS	Contact for details

Quality Control

Our Maddercolour is produced and tested under stringent quality management systems to ensure batch-to-batch consistency and purity. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as color strength, purity, and heavy metal content. Quality standards are aligned with relevant guidelines for natural colorants, including those for cosmetics and food applications where specified.

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). Keep away from excessive heat and incompatible materials.

Specification

Item	Specification
Appearance	Red to reddish-brown powder
Identification (IR)	Conforms to standard
Assay (Color Value)	≥ 95%
Loss on Drying	≤ 5.0%
Ash Content	≤ 2.0%
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm
Solubility	Soluble in alkaline solutions; sparingly soluble in water

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