Description

Sillitin Z CAS NO 39443-41-9 is a high-purity, synthetic precipitated silica, also known as silicon dioxide, valued for its exceptional reinforcing and thickening properties. This versatile inorganic material is engineered to provide superior performance as a functional filler and rheology modifier in a wide range of industrial applications. It is an essential component for manufacturers in the rubber, plastics, coatings, and personal care industries seeking to enhance product durability, stability, and processing characteristics.

Application

• Rubber Industry: Acts as a high-performance reinforcing filler in silicone rubber, tires, and industrial rubber goods to improve tensile strength, tear resistance, and abrasion.
• Plastics & Polymers: Used as a filler and anti-blocking agent in films, cables, and engineering plastics to enhance mechanical properties and surface quality.
• Coatings & Inks: Serves as a matting agent, anti-settling agent, and rheology modifier to control gloss, prevent sagging, and improve suspension in paints and printing inks.
• Personal Care & Cosmetics: Functions as a viscosity regulator, absorbent, and gentle abrasive in toothpastes, creams, and powders.
• Adhesives & Sealants: Provides thixotropy, reinforcement, and improved bonding strength in various adhesive formulations.
• Food & Pharmaceuticals: Employed as an anti-caking agent, carrier, or viscosity enhancer in powdered food products and certain pharmaceutical preparations (subject to appropriate grade availability).
• Animal Feed: Used as a flow aid and anti-caking agent in premixes and mineral feed supplements.

Basic Information

Product Name	Sillitin Z
CAS No.	39443-41-9
Molecular Formula	SiO₂
Molecular Weight	60.08 g/mol
Synonyms	Precipitated Silica; Synthetic Amorphous Silica; Silicon Dioxide (precipitated); Silica, amorphous; Hydrophilic Silica; Zeosil; Ultrasil; Hi-Sil; FK; Tixosil; Aerosil (fumed type, related); Food Additive E551; CAS 7631-86-9 (for amorphous silica, general)
EINECS	Contact for details

Quality Control

Our Sillitin Z is manufactured under a stringent quality management system. Each batch undergoes rigorous testing for key parameters including purity, particle size distribution, surface area, and loss on drying to ensure consistent performance and compliance with relevant industry standards. Certificates of Analysis (COA) documenting these 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 room temperature (15-25°C). Keep away from strong acids and strong alkalis. This material is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	White, fine powder
Identification (IR)	Conforms
Assay (SiO₂)	≥ 98.0 %
Loss on Drying (105°C)	≤ 7.0 %
Loss on Ignition (1000°C)	≤ 10.0 %
pH (5% suspension)	6.0 - 8.0
Surface Area (BET)	Contact for details
Particle Size (D50)	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm

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