Poly(dimethylsiloxane), Hydride Terminated(CAS 70900-21-9)
| Purity | Grade | Package | Stock | Price | Quantity |
| Viscosity around 5; hydrogen content 0.3-0.5%. | RG | 25G | In Stock | 14 USD
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| Viscosity around 5; hydrogen content 0.3-0.5%. | RG | 100G | In Stock | 39 USD
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| Viscosity around 5; hydrogen content 0.3-0.5%. | RG | 500G | In Stock | 120 USD
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| Viscosity around 5; hydrogen content 0.3-0.5%. | RG | 2.5KG | In Stock | 456 USD
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| Bulk Packaging | 125KG | substantially lower unit cost than small-pack SKUs. Contact us for a fast quotation. | |||
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Applications of 70900-21-9
| Industry | Application | Process |
|---|---|---|
| Chemicals | Used as a crosslinker or capping agent for organosilicon materials such as silicone rubber and silicone oil | Introduces reactive hydrogen groups into polymerization reactions to participate in addition reactions (e.g., hydrosilylation with vinyl siloxanes under platinum catalysis), thereby controlling molecular weight and end-group functionality |
| Coatings & Paints | Improves coating adhesion, weather resistance, and surface properties | Acts as a functional additive in curing reactions to form a crosslinked network structure |
| Adhesives & Sealants | Provides crosslinking sites to enhance cohesive strength and elasticity | Forms a three-dimensional network via addition-cure vulcanization with unsaturated components (e.g., vinyl siloxanes) |
| Electronic Encapsulation | Regulates rheology and cure characteristics in encapsulation materials | Functions as a reactive diluent or crosslinking component, participating in the curing process upon heating and in the presence of a catalyst |
| Textile Finishing | Imparts softness, water repellency, and wrinkle resistance to fabrics | Forms an organosilicon film on fiber surfaces through impregnation or coating processes; functional finishing is achieved after curing |
Physical and chemical properties of 70900-21-9
Boiling Point |
230°C(lit.) |
|---|---|
Density |
0.93g/mL |
Flash Point |
112.8°C |
Molecular Formula |
C2H7OSi-(C2H6OSi)n-C2H7Si |
Q&A for CAS 70900-21-9
1. How can I verify product quality?
Every batch of our Chemical Reagents is tested to meet ISO 9001 standards. We provide COA & NMR & SDS Provided with each shipment. Batch COA available for verification, and third-party retesting is supported. A full refund is offered if our data is incorrect.
2. What is the delivery time?
Orders from Ready stock / In stock items typically Ships Tomorrow via Fast Shipping via FedEx/DHL/UPS. International deliveries usually arrive within 7 business days, subject to customs clearance.
3. What if the received product doesn’t meet quality standards?
If your Lab Grade Chemical Reagents do not match the Batch COA available, we will issue a replacement or a full refund upon verification.
4. Are hazardous labels included? How is safe shipping ensured?
Hazardous products are labeled and packaged following international regulations. We provide SDS Provided with all hazardous shipments to ensure safe and compliant transport.
5. Do you offer technical support?
Yes. Our Lab Supplier team is available to assist with questions about product usage, storage, Lab Grade requirements, applications, and more.
6. Are volume discounts available?
Yes. For bulk orders of Chemical Reagents, we offer competitive pricing. Submit a quotation request and we’ll provide a tailored offer.
7. Do you provide samples?
Yes, samples are available for selected Lab Grade products. Please submit a request to confirm availability and specifications.
8. Do you have products in stock?
Yes. Items labeled In stock / Ready stock on our website are available for immediate shipment, usually within 1–2 business days. Large packs or custom specifications require lead time confirmation.
9. Can you customize purity or packaging?
Yes. We support customization of Lab Grade purity, packaging size, and special testing requirements. Share your needs and we’ll provide a tailored solution.
10. Is the COA consistent with the shipped batch?
Yes. Batch COA available matches the actual shipment. COAs shown online are for reference or from previous batches.
11. Do you support long-term supply agreements?
Yes. We offer Lab Supplier services for stable batch consistency, pricing agreements, and safety stock for long-term customers to ensure uninterrupted supply.
12. What payment methods do you accept?
We accept Pay Local Currency via bank transfer (T/T), PayPal, and other methods. Credit terms are available for qualified long-term partners.
Download SDS of 70900-21-9
Pictograms |
 |
|---|---|
Signal Word |
Warning |
Hazard Statements |
H302 Harmful if swallowed H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation |
Safety Data Sheet |
Download COA of 70900-21-9
Operate under the ISO 9001 system
