Description

cis-Rubixanthin CAS NO 29558-16-5 is a specific geometric isomer of the naturally occurring carotenoid pigment rubixanthin. This compound is valued for its role as a potent colorant and its potential bioactive properties. It is primarily sought after by manufacturers in the nutraceutical, food, and cosmetic industries for applications requiring stable, natural coloration and antioxidant functionality.

Application

• Natural Food Colorant: Used to impart yellow to orange hues in beverages, confectionery, and dairy products.
• Dietary Supplement Formulation: Incorporated into capsules and tablets for its potential antioxidant and pro-vitamin A activity.
• Cosmetic and Personal Care: Functions as a coloring agent and skin-conditioning ingredient in creams, lotions, and makeup.
• Animal Feed Additive: Enhances the coloration of poultry skin and egg yolks, and supports animal health.
• Pharmaceutical Excipient: Employed as a natural colorant in tablet coatings and medicinal syrups.
• Research and Development: Serves as a reference standard and biochemical reagent in analytical and nutritional studies.

Basic Information

Product Name	cis-Rubixanthin
CAS No.	29558-16-5
Molecular Formula	C₄₀H₅₆O
Molecular Weight	536.88 g/mol
Synonyms	(3R)-beta,psi-Caroten-3-ol; Rubixanthin; (3R)-beta,psi-Caroten-3-ol, cis-; cis-(3R)-beta,psi-Caroten-3-ol; Natural Yellow 27; Carotenol; Provitamin A carotenoid
EINECS	Contact for details

Quality Control

Our cis-Rubixanthin is produced and tested under a strict quality management system. Each batch is analyzed to ensure it meets high-purity standards suitable for food, cosmetic, and nutraceutical applications. A comprehensive Certificate of Analysis (COA) detailing purity, isomer profile, and safety parameters is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) at 2-8°C to minimize oxidation and degradation. Keep the container in a cool, dry, and well-ventilated area away from heat sources and incompatible materials.

Specification

Item	Specification
Appearance	Orange to red-orange powder or crystals
Identification (HPLC/UV)	Conforms to reference standard
Assay (HPLC)	≥ 95.0% (Total Carotenoids)
cis-Isomer Content (HPLC)	≥ 90.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 10 ppm
Residual Solvents (GC)	Meets ICH guidelines
Microbiological Analysis	Meets standard specifications for food/phyto ingredients

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