Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
2,4,6,8-TETRAMETHYLCYCLOTETRASILOXANE
1. Basic Information
Name: 2,4,6,8-Tetramethylcyclotetrasiloxane
Alias: D4H, Tetramethylcyclotetrasiloxane, Cyclotetrasiloxane tetrahydride
CAS No.: 2370-88-9
Molecular Formula: C4H16O4Si4
Molecular Weight: 240.51
Category: Hydrogen-containing cyclic silicone monomer, organosilicon fine chemical raw material, silicone synthesis intermediate
2. Physical and Chemical Properties
Physical Properties
- Appearance: Colorless transparent low-viscosity liquid
- Odor: Faint mild silicone characteristic odor
- Solubility: Miscible with toluene, xylene, ethanol, acetone, petroleum ether; insoluble in water
- Melting Point: ?69 ℃
- Boiling Point: 134–136 ℃
- Density (20℃): 0.98–0.99 g/cm3
- Refractive Index nD20: 1.386–1.388
- Flash Point: 32 ℃
- Hygroscopy: Non-hygroscopic
- Aqueous property: Stable in neutral water, slowly hydrolyzes under acidic/alkaline conditions to release hydrogen gas
Chemical Properties
- Molecular structure: Four-membered siloxane ring, each silicon atom bonded with one methyl group and one reactive Si-H hydrogen group
- Hydrosilylation reaction: Si-H bond undergoes addition reaction with carbon-carbon double bonds under platinum catalyst to synthesize modified silicone oil, silicone resin
- Hydrolysis characteristic: Si-H group reacts with water, alcohol, carboxylic acid to generate hydrogen; violent reaction in strong alkaline medium
- Thermal stability: Stable below 100 ℃; high temperature may trigger ring-opening polymerization and dehydrogenation
- Photostability: Slightly light-sensitive, long-term UV irradiation accelerates slow polymerization
- Compatibility: Compatible with most non-polar and weak polar organic solvents; incompatible with strong alkali, strong oxidants, metal alkalis
3. Main Application Fields
1. Modified Silicone Synthetic Monomer (Core Application)
Key raw material for polyether modified silicone oil, amino silicone oil, epoxy silicone oil, crosslinking agent for addition type liquid silicone rubber
2. Silicone Coating & Release Agent Intermediate
Raw material for solvent-free silicone release coating, textile soft finishing agent, waterproof silicone emulsion
3. Industrial Silicone Crosslinker
Hydrogen-containing silicone crosslinker for LED potting glue, electronic insulating silicone gel, mold silicone rubber
4. Laboratory Organosilicon Reagent
Standard monomer for hydrosilylation reaction research in silicone chemistry laboratory
4. Quality Specification Table
| Test Item | Standard Specification |
| CAS Number | 2370-88-9 |
| Molecular Formula | C4H16O4Si4 |
| Appearance | Colorless clear liquid without suspended impurities |
| GC Purity | Industrial Grade ≥99.0% |
| Si-H Hydrogen Content | ≥1.60 mol/100g |
| Water Content (KF) | ≤0.05% |
| Chroma (APHA) | ≤10 |
| Heavy Metals (Pb) | ≤10 ppm |
| Packaging | 1L/5L amber fluorinated plastic bottle, 25kg PE plastic drum, 200kg galvanized steel drum, 1000L IBC tote tank |
| Storage Condition | Hermetically sealed cool dry warehouse below 25 ℃, full light shielding, isolate alkaline substances, water and oxidants; prohibit open air storage |
| Transportation Requirement | Flammable hydrogen-containing silicone liquid, sealed anti-hydrolysis packaging, avoid violent collision |
| Shelf Life | 24 months under nitrogen sealed storage |
Safety Warning
Flammable irritant organosilicon liquid. Vapor irritates eyes, respiratory tract and skin; contact with strong alkali or water produces flammable hydrogen gas with explosion risk. All operations must be carried out in ventilated fume hood with nitrile chemical-resistant gloves, splash-proof goggles and fire-proof equipment. Strictly isolate alkaline raw materials, water and oxidants during storage and transportation. Waste liquid diluted with inert solvent before neutralization treatment; residual liquid classified as flammable organosilicon hazardous waste disposed by licensed professional institutions.
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