Description

Thearubigin CAS NO 12698-96-3 is a complex polyphenolic pigment primarily responsible for the characteristic reddish-brown color and astringency in black tea. This compound is a key quality marker, directly influencing the color intensity, mouthfeel, and overall sensory profile of tea-based products. It is an essential ingredient for manufacturers in the food, beverage, and nutraceutical industries seeking to standardize color, enhance flavor complexity, or develop functional ingredients with antioxidant properties.

Application

• Food & Beverage Coloring: As a natural colorant for tea beverages, ready-to-drink teas, flavored waters, confectionery, and dairy products.
• Tea Product Standardization: Used to adjust and standardize the color and astringency of instant tea powders, tea concentrates, and blended tea products.
• Nutraceutical & Dietary Supplements: Incorporated into capsules and tablets for its associated antioxidant and potential bioactive properties.
• Flavor & Fragrance Industry: Serves as a base material for creating authentic tea flavor profiles and nuances in various applications.
• Cosmetic Formulations: Utilized in natural skincare products for its coloring properties and potential antioxidant benefits.
• Research & Development: Acts as a reference standard or raw material in biochemical, nutritional, and food science research.

Basic Information

Product Name	Thearubigin
CAS No.	12698-96-3
Molecular Formula	Complex polymeric polyphenol (Variable)
Molecular Weight	Variable (Polymeric mixture)
Synonyms	Thearubigins; Tea Red Pigment; Black Tea Pigment; TR; Tea Polyphenol Polymer; Oxidized Tea Polyphenols; Theaflavin Gallate Polymers; Camellia sinensis Polymerized Polyphenols
EINECS	Contact for details

Quality Control

Our Thearubigin is produced and tested to meet stringent quality standards suitable for food and nutraceutical applications. Each batch is analyzed for key parameters including color strength (spectrophotometry), polyphenol profile (HPLC), and purity. We ensure compliance with relevant food safety regulations. Certificates of Analysis (COA) detailing batch-specific results are available upon request.

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). This material is light-sensitive (store away from light) and easily oxidized (store under inert atmosphere); prolonged exposure to air, light, or elevated temperatures should be avoided to maintain stability and color integrity.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to standard
Assay (Total Polyphenols)	≥ 90.0% (by UV-Vis)
Color Value (E1cm1% at 460 nm)	≥ 150
Loss on Drying	≤ 5.0%
Ash	≤ 2.0%
Heavy Metals (as Pb)	≤ 10 ppm
Microbiological Analysis	Meets standard food-grade limits

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