Description

Bi-Lawsone is a synthetic derivative of lawsone, the primary coloring component of henna, known for its distinctive orange-red hue. This compound is valued for its enhanced stability and purity profile compared to its natural counterpart, making it a critical ingredient for consistent coloration. It is primarily utilized by manufacturers in the cosmetics, hair dyes, and personal care industries seeking reliable and high-quality natural colorants.

Application

• Hair Coloring Products: A key pigment in permanent, semi-permanent, and temporary hair dyes, providing rich, natural-looking auburn to red tones.
• Cosmetic Formulations: Used in lipsticks, blushes, and other color cosmetics as a natural-origin color additive.
• Temporary Skin Staining: Employed in the production of body art paints, henna cones, and festival makeup for temporary decorative tattoos.
• Textile Dyeing: Acts as a natural dye for protein-based fibers like silk and wool in niche textile applications.
• Research & Development: Serves as a reference standard and intermediate in chemical and pharmaceutical research.

Basic Information

Product Name	Bi-Lawsone
CAS No.	33440-64-1
Molecular Formula	C10H6O4
Molecular Weight	190.15 g/mol
Synonyms	2-Hydroxy-1,4-naphthoquinone dimer; Bis-lawsone; Lawsone dimer; Henna dimer; CI 75480 (related); Natural Orange 6 (related); 1,4-Naphthoquinone, 2-hydroxy-, dimer
EINECS	Contact for details

Quality Control

Our Bi-Lawsone is produced under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is tested against stringent in-house specifications, which typically include identity confirmation, assay, and impurity profiling. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your formulation requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C). Due to its light-sensitive and easily oxidized nature, it is recommended to store the product under an inert atmosphere for long-term preservation and to minimize exposure to air upon opening.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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