Silane coupling agents (Amino Silane, Epoxy Silane, Vinyl Silane, etc.) differ greatly from solvents. Most are classified as UN Class 3 flammable liquids or Class 8 corrosive substances; some contain SVHC siloxane impurities. Food/pharmaceutical grades follow positive list regulations with strict control on hydrolysis stability and impurities. Global procurement compliance requirements are detailed below.
Main Category: Class 3 flammable liquids (e.g. KH-550, A-171, Vinyl Silane) with flash point 25–60℃, UN Number 1993.
Partial Category: Class 8 corrosive substances (e.g. Chlorosilane, high-concentration Amino Silane) causing skin and metal corrosion, UN Number 2920.
Minor Category: Irritant/sensitizing substances classified as GHS Category 4 with mandatory warning labels.
Rising SVHC Risks: The EU added Octamethyltrisiloxane and Decamethyltetrasiloxane to the SVHC list in 2025. Notification is required if low-molecular siloxane impurities exceed 0.1% in silane coupling agents.
Procurement Principle: Require suppliers to provide CAS Number, GHS Classification, UN Number, low-molecular siloxane content and SVHC confirmation.
Silane coupling agents are prone to hydrolysis and exothermic reaction with water, releasing methanol/ethanol. SDS must highlight the following key points:
16-section Mandatory SDS: Specify hydrolysis characteristics, water reaction risks, methanol release, storage humidity < 50% and hermetic sealing requirements.
GHS Labeling: Display flame (flammability) + corrosion (partial products) with signal words "Warning/Danger". Must be marked with "Releases flammable gas in contact with water".
Multi-language Version: German/French/Spanish for the EU, English for the US, and local languages for Asian markets.
Registration: Mandatory ECHA registration for annual volume ≥ 1 ton, including CSR and exposure scenarios.
SVHC Notification: Notification required if low-molecular siloxanes (D4/D5/D6, Octamethyltrisiloxane, etc.) exceed 0.1% with annual volume ≥ 1 ton; disclosure mandatory for content over 0.1% but annual volume below 1 ton.
Restrictions: D4/D5 are banned in cleaning and personal care products with strict impurity limits for silane coupling agents.
CLP Classification: Labeling must reflect flammable liquid, water reaction and partial corrosion attributes.
EU: Comply with 1935/2004, 2023/2006 and BfR XV regulations. Silane coupling agents used in food contact materials must be on the positive list (e.g. Triethoxysilane CAS 78-69-8) with content limits and migration test requirements.
US: Comply with FDA 21 CFR 175.105 & 176.170. Approved silane list required; purity ≥99%, heavy metals <10ppm, methanol <0.5%.
China: Comply with GB 4806.16-2025. Clear positive list with exclusive CAS numbers and impurity limits; unlisted products are prohibited for food contact applications.
Purity Standard: ≥99.5%, moisture <50ppm, free chlorine <10ppm, heavy metals <5ppm.
Hydrolysis Stability: Shelf life ≥12 months, storage humidity <50% with nitrogen-sealed packaging. SDS must specify hydrolysis half-life and storage conditions.
Low-molecular Siloxane: D4/D5/D6 content <0.1% to avoid electronic migration and insulation degradation.
Maritime Transport (IMDG): Class 3 flammable liquid with UN 1993 and Packaging Category II/III. Strictly avoid water contact; use sealed steel/plastic drums lined with PTFE and equipped with desiccants.
Air Transport (IATA): Stricter volume limits, leak-proof packaging and desiccants required; high-concentration products prohibited on passenger flights.
Land Transport (ADR): Require explosion-proof vehicles, anti-static design, escort personnel and storage away from water sources.
Packaging: UN-certified sealed light-shielding dry packaging; wooden packaging requires IPPC fumigation.
China: Mandatory hazardous chemical business license, hazardous chemical registration, GB 30000 labeling and SDS (GB/T 16483); follow GB 4806.16-2025 positive list for food contact use.
Japan: Governed by Chemical Review Law and Industrial Safety and Health Law with food contact positive list; bilingual SDS (Japanese & English) and GHS labeling required.
South Korea: Comply with K-REACH, food contact list and SVHC regulations.
MERCOSUR: New independent silicone regulatory resolution effective June 2026 requiring positive list compliance, impurity limits and migration tests.
Business License + Hazardous chemical production / operation license
Hydrolysis-focused SDS + GHS Labeling + UN Number + COA
Low-molecular siloxane test report (D4/D5/D6 / Octamethyltrisiloxane)
REACH registration number + SVHC compliance declaration
Food/Pharmaceutical Grade: Positive list compliance certificate + migration test + heavy metal test report
Electronic Grade: High purity report + low metal/low ion certificate + hydrolysis stability report
For global B-end buyers of silane coupling agents, the core compliance principle is Flammability/Corrosion Risk + Hydrolysis Hazard + SVHC Siloxane Control + Industry-specific Limits + Strict Water Isolation:
Classification: Confirm Class 3 flammability / Class 8 corrosion attribute, UN number and low-molecular siloxane content;
Documents: 16-section SDS (focus on hydrolysis/water reaction), GHS labeling, COA and siloxane test reports;
EU Market: REACH registration, SVHC siloxane notification, CLP labeling and impurity limit compliance;
Food/Pharmaceutical Industry: Global positive list compliance, migration test and heavy metal/methanol limits;
Electronics/Lithium Battery Industry: High purity, low moisture, low metal, low siloxane and hydrolysis stability;
Transportation: IMDG/IATA/ADR compliance, UN sealed packaging, desiccants and storage away from water;
Asia & Other Regions: Local hazardous chemical license, food contact list and GHS labeling;
Supplier Management: Complete qualifications, siloxane test reports, industry-specific documents and full traceability.
+86-13120989737 
info@hisiaddi.com 
English
