Ethyl Silicate 28 Density 0.929-0.935 g/cm³ Specs

Technical Specifications: Ethyl Silicate 28 Density 0.929-0.935 g/cm³ Compliance

Procurement of Ethyl Silicate 28 requires strict adherence to physical constants that dictate hydrolysis rates and final silica network formation. The specific gravity, typically measured at 20°C, serves as a primary indicator of monomeric purity and the extent of pre-polymerization. For industrial-grade tetraethyl orthosilicate derivatives yielding 28% silica, the density must fall within the narrow range of 0.929-0.935 g/cm³. Deviations outside this window often signal contamination with higher oligomers or residual ethanol, which compromises the stoichiometry of sol-gel processes.

Quality assurance protocols at NINGBO INNO PHARMCHEM CO.,LTD. utilize gas chromatography-mass spectrometry (GC-MS) to verify composition alongside physical property testing. The material appears as a colorless transparent liquid with high volatility and a characteristic alcoholic odor due to the ethoxy groups. Upon complete hydrolysis, the theoretical yield of silicon dioxide (SiO₂) is approximately 28 wt.%, defining the product classification. Acidity levels are maintained below 0.001% (as HCl) to prevent premature catalytic condensation during storage.

The following table outlines the critical parameter benchmarks required for high-performance binder applications, comparing target specifications against typical industry ranges for this class of silicon ester:

Parameter	Target Specification	Typical Industry Range	Test Method
Appearance	Colorless Transparent Liquid	Colorless to Slightly Hazy	Visual / APHA
Density (20°C)	0.929 - 0.935 g/cm³	0.928 - 0.936 g/cm³	ASTM D4052
SiO₂ Content	28 ± 0.5 wt.%	27 - 29 wt.%	Gravimetric Analysis
Purity (GC)	> 99.5%	> 98.0%	GC-MS
Acidity (as HCl)	< 0.001%	< 0.005%	Titration
Viscosity (25°C)	0.97 cps	0.90 - 1.10 cps	Brookfield
Boiling Point	~168°C	165 - 170°C	ASTM D86

Maintaining the density within the 0.929-0.935 g/cm³ window is critical for consistency in crosslinking agent applications. Variations in density directly correlate to the average molecular weight of the silicate species present. Lower density may indicate higher ethanol content, while higher density suggests advanced condensation into ethyl polysilicate chains, which alters reactivity with inorganic substrates.

Industrial Applications for Ethyl Silicate 28 in Refractory Binders and Silica Coating

The primary function of this material is to serve as a liquid source of silica for binding inorganic fillers. In precision casting and foundry engineering, the hydrolysis of TEOS generates polymeric SiO₂ structures that firmly bind refractory fillers. These structures adhere effectively to substrates such as glass, ceramics, and metals, improving mechanical and chemical resistance. The resulting thin SiO₂ film is highly heat-resistant, making it indispensable for ceramic shell and core production.

In the coatings sector, the material acts as a binder for heat-, chemical-, and weather-resistant formulations. It forms a fast-drying, water-repellent film with low shrinkage and stable gloss. A specific high-value application involves zinc-rich primers, where the silicate matrix provides cathodic protection while maintaining thermal stability. Engineers developing these systems should reference the Ethyl Silicate 28 Zinc Rich Primer Formulation Guide to optimize pigment volume concentration and hydrolysis ratios for maximum corrosion resistance.

Additionally, the product functions as a water scavenger in sealants and a source of finely divided silica for polymer additives. In food packaging films, it enhances transparency and creates a gas barrier, extending product shelf life. The versatility of the silica binder extends to organic synthesis reagents and as a dehydrator in chemical processing where moisture sensitivity is a critical control parameter.

Critical Storage Protocols to Maintain Ethyl Silicate 28 Stability and Density

Chemical stability is contingent upon strict exclusion of moisture. Ethyl Silicate 28 is prone to hydrolysis upon contact with atmospheric humidity, leading to polymerization and eventual gelation. Storage must be executed in tightly closed original containers made of compatible materials, typically lined steel or specific grades of stainless steel. Exposure to light, heat, or peroxides can accelerate polymerization, resulting in viscosity increases and precipitation of silica solids.

Warehousing environments should maintain a cool, dry atmosphere with temperature control to prevent thermal decomposition. The boiling point of approximately 168°C indicates significant volatility; therefore, ventilation systems must manage vapor accumulation to stay within safety limits. Inventory management should follow a first-in, first-out (FIFO) protocol to ensure the material is utilized within its optimal stability window. While storage beyond the labeled date does not automatically render the product unusable, quality assurance checks on density and clarity are mandatory before deployment in sensitive formulations.

Containers must be inspected regularly for integrity. Any breach in the seal allows moisture ingress, which initiates the condensation reaction prematurely. This reaction generates ethanol as a by-product, potentially altering the internal pressure of the container and shifting the chemical equilibrium of the hydrolyzed silicate mixture.

Bulk Procurement Logistics and Packaging Options for Ethyl Silicate 28

Supply chain efficiency for hazardous chemicals requires standardized packaging that ensures safety during transit and handling. Standard export packaging includes 25 kg steel cans for laboratory and pilot-scale trials, 190 kg steel drums for medium-volume production, and 850 kg intermediate bulk containers (IBCs) for large-scale industrial consumption. All packaging units are labeled with batch-specific data, including manufacturing dates and stability endpoints.

For facilities requiring consistent supply chains for global manufacturer standards, NINGBO INNO PHARMCHEM CO.,LTD. provides logistical support tailored to hazardous material regulations. When evaluating supply options, procurement managers should verify the compatibility of the Ethyl Silicate 28 tetraethyl orthosilicate binder solution with existing intake infrastructure. Bulk transfers should utilize closed-loop systems to minimize exposure to ambient humidity and reduce volatile organic compound (VOC) emissions.

Shipping documentation must accurately reflect the chemical classification and hazard codes. Lead times vary based on destination and volume, but stock availability for standard grades is maintained to support continuous manufacturing operations. Custom packaging configurations are available upon request for specialized automated dosing systems.

Regulatory Compliance and Safety Data Sheets for Ethyl Silicate 28 Procurement

Regulatory documentation focuses on safety handling, transport classification, and chemical composition disclosure. Every shipment is accompanied by a comprehensive Safety Data Sheet (SDS) detailing hazard identification, composition information, and first-aid measures. The SDS confirms the CAS number 11099-06-2 and provides guidance on personal protective equipment (PPE) required for handling, including chemical-resistant gloves and eye protection.

Quality documentation includes Certificates of Analysis (COA) for each batch, verifying density, purity, and SiO₂ content against specifications. These documents are essential for quality audits in regulated industries such as aerospace and automotive coatings. For facilities transitioning from alternative suppliers, technical data supports the validation of Ethyl Silicate 28 direct drop-in replacement for TES 28 without requiring full reformulation.

Compliance efforts prioritize accurate labeling and hazard communication over unverified regulatory claims. Users are advised to consult the SDS for specific disposal guidelines and environmental precautions. The material is classified based on its flammability and irritation potential, necessitating strict adherence to local storage and handling regulations. Continuous monitoring of regulatory updates ensures that documentation remains current with international trade and safety standards.

For custom synthesis requirements or to validate our drop-in replacement data, consult with our process engineers directly.