Description

Lithol Rubin Bca CAS NO 5858-81-1 is a high-performance, synthetic organic pigment belonging to the β-naphthol pigment class, valued for its clean, bluish-red shade and excellent color strength. This pigment is engineered to deliver superior lightfastness, heat stability, and chemical resistance, making it a critical component for demanding coloration applications. It is primarily sought after by manufacturers in the coatings, plastics, printing inks, and masterbatch industries who require consistent, vibrant, and durable red hues.

Application

• Industrial Coatings and Paints: Used in automotive finishes, industrial machinery coatings, and architectural paints for its weather resistance and color stability.
• Plastics and Polymers: An essential colorant for PVC, polyolefins (PP, PE), and engineering plastics, providing excellent dispersion and heat stability during processing.
• Printing Inks: Formulated into high-quality offset, gravure, and flexographic inks for packaging, publications, and decorative prints.
• Masterbatch Production: Supplied as a concentrated pigment for creating color masterbatches used in plastic molding and extrusion.
• Synthetic Fibers: Employed in the mass coloration of fibers where consistent shade and fastness properties are required.
• Specialty Applications: Suitable for coloring rubber, leather finishes, and other specialty materials requiring a durable red pigment.

Basic Information

Product Name	Lithol Rubin Bca
CAS No.	5858-81-1
Molecular Formula	C18H12N2O6SCa
Molecular Weight	424.44 g/mol
Synonyms	Pigment Red 57:1; C.I. 15850:1; Calcium 4-[(5-chloro-4-methyl-2-sulfophenyl)azo]-3-hydroxy-2-naphthalenecarboxylate; Lithol Rubine BCA; Permanent Carmine FBB; Red 57:1; Rubine Toner; Calcium Lithol Rubine; Naphthol AS-BI; CI 15850:1
EINECS	227-476-5

Quality Control

Our Lithol Rubin Bca is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Quality parameters such as color strength, hue, particle size distribution, and chemical purity are rigorously tested against established internal and industry standards. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials. For long-term storage, ensure the original packaging remains sealed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Red Powder
Identification (IR)	Conforms
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Moisture Content	≤ 2.0%
Water Soluble Matter	≤ 1.5%
Residue on Sieve (63 µm)	≤ 0.1%
pH Value (Aqueous Slurry)	6.0 - 8.0
Lightfastness	≥ 6 (ISO 105-B02)
Heat Stability	≥ 200°C

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