Description

Rosin CAS NO 12698-87-2 is a natural solid resin derived primarily from pine trees, consisting of a complex mixture of resin acids, predominantly abietic acid and its isomers. This versatile material is valued for its tackifying, adhesive, and film-forming properties, making it a crucial ingredient in numerous industrial formulations. Key industries that rely on rosin include adhesives, coatings, inks, rubber, and soldering fluxes.

Application

• Adhesives & Sealants: A primary tackifier in pressure-sensitive adhesives (PSAs), hot-melt adhesives, and sealants for tapes, labels, and packaging.
• Coatings & Inks: Used as a hard resin to improve gloss, adhesion, and drying time in printing inks, varnishes, and protective coatings.
• Rubber Compounding: Acts as a processing aid and tackifier in the manufacture of tires, conveyor belts, and other rubber products.
• Soldering Fluxes: A core component in flux formulations for electronics assembly, where it cleans metal surfaces and promotes solder flow.
• Paper Sizing: Employed in the papermaking process to improve water resistance and printability of paper products.
• Chewing Gum Base: Serves as a texturizing and softening agent in the food-grade gum base industry.
• Soaps & Detergents: Used in the production of rosin soaps and as an emulsifier in various cleaning formulations.
• Musical Instruments: Applied to violin bows and other string instrument bows to create necessary friction.

Basic Information

Product Name	Rosin
CAS No.	12698-87-2
Molecular Formula	Mixture (C19H29COOH typical)
Molecular Weight	~302.5 g/mol (for abietic acid)
Synonyms	Colophony; Gum Rosin; Pine Resin; Wood Rosin; Tall Oil Rosin; Rosin Gum; Abietic Acid Resin; Ester Gum (modified forms); UNII-72T7AE7E0F; FEMA 2918
EINECS	235-708-1

Quality Control

Our Rosin is produced and tested to meet stringent quality standards for industrial applications. We offer various grades, including gum rosin, wood rosin, and tall oil rosin, with specifications tailored to end-use requirements. Certificates of Analysis (COA) documenting parameters such as acid value, softening point, color grade, and impurity levels are available for every batch to ensure consistency and performance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat sources and open flames. Under proper storage conditions, the product is stable for extended periods.

Specification

Item	Specification
Appearance	Translucent, pale yellow to amber solid
Acid Value (mg KOH/g)	150 - 180
Saponification Value (mg KOH/g)	160 - 190
Softening Point (Ring & Ball, °C)	70 - 85
Color (Gardner Scale)	WG - WW (or as per grade)
Ash Content (%)	≤ 0.05
Unsaponifiable Matter (%)	≤ 8.0

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