Description

Calcium 3-Hydroxy-4-[(5-Sulphonato-1-Naphthyl)Azo]-2-Naphthoate is a high-purity azo dye complex salt, also known as Calcium Lake Red C. This compound is valued for its excellent color strength, stability, and compatibility in demanding formulations. It is primarily utilized by manufacturers in the food, cosmetic, and pharmaceutical industries seeking a reliable and compliant pigment.

Application

• Primary use as a colorant (Lake Red C) in food products, including confectionery, beverages, and dairy.
• Pigment for cosmetic and personal care formulations, such as lipsticks, blushes, and soaps.
• Coloring agent in pharmaceutical tablets and coatings where a stable, non-migrating color is required.
• Industrial applications in inks and specialty coatings that require good light and heat fastness.
• Used in the coloration of plastic and polymer materials for consumer goods.
• Potential application as a staining agent or indicator in laboratory and diagnostic settings.

Basic Information

Product Name	Calcium 3-Hydroxy-4-[(5-Sulphonato-1-Naphthyl)Azo]-2-Naphthoate
CAS No.	84051-93-4
Molecular Formula	C21H12CaN2O7S
Molecular Weight	460.46 g/mol
Synonyms	Calcium Lake Red C; CI 16035:1; Food Red 7:1; Calcium 3-hydroxy-4-[(5-sulfo-1-naphthalenyl)azo]-2-naphthalenecarboxylate; Pigment Red 57:1 (related calcium salt); Calcium salt of 3-Hydroxy-4-[(5-sulfo-1-naphthyl)azo]-2-naphthoic acid; FD&C Red No. 40 Calcium Lake; E129 Lake
EINECS	Contact for details

Quality Control

Our Calcium 3-Hydroxy-4-[(5-Sulphonato-1-Naphthyl)Azo]-2-Naphthoate is manufactured under strict quality management systems. Production adheres to relevant standards for color additives, including potential compliance with FCC (Food Chemicals Codex), EU food additive regulations (E129), and Japanese Standards (JSFA). Every batch is tested for identity, purity, and heavy metal content. Certificates of Analysis (COA) documenting full specifications 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Red to reddish-brown powder
Identification (IR)	Conforms to standard
Assay (Color Content)	≥ 90.0%
Loss on Drying	≤ 10.0%
Water-soluble Matter	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm
Lead (Pb)	≤ 10 ppm
Mercury (Hg)	≤ 1 ppm

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