2,4,6,8-Tetramethylcyclotetrasiloxane
Also known as: 1,3,5,7-Tetramethylcyclotetrasiloxane, Tetramethylcyclotetrasiloxane, TMCTS, D4H, Cyclotetrasiloxane, 2,4,6,8-tetramethyl-, 1,3,5,7-Cyclotetra(methylsiloxane), H-4, HD4
2,4,6,8-Tetramethylcyclotetrasiloxane (CAS 2370-88-9) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C4H16O4Si4 and a molecular weight of 240.509 g/mol. Key properties include a melting point of −69 °C(lit.), a boiling point of 134.5±0.0 °C at 760 mmHg, a density of 0.986 g/mL at 25 °C(lit.) and a flash point of 31.5±18.7 °C. It is classified under GHS with signal word Warning and hazard statements H226 — Flammable liquid and vapour. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 2370-88-9
- Jingsj CID
- J-20148-5
- Molecular Formula
- C4H16O4Si4
- Molecular Weight
- 240.509 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −69 °C(lit.) |
|---|---|
| Boiling Point | 134.5±0.0 °C at 760 mmHg |
| Density | 0.986 g/mL at 25 °C(lit.) |
| Flash Point | 31.5±18.7 °C |
| Exact Mass | 240.012558 |
| PSA | 36.92000 |
| Vapor Pressure | 9.9±0.2 mmHg at 25°C |
| Refractive Index | n20/D 1.387(lit.) |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
Customs & Trade Information
| HS Code | 2901100000 |
|---|---|
| Summary | 2901100000 saturated acyclic hydrocarbons。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 2,4,6,8-Tetramethylcyclotetrasiloxane?
The CAS number of 2,4,6,8-Tetramethylcyclotetrasiloxane is 2370-88-9.
What are the molecular formula and molecular weight of 2,4,6,8-Tetramethylcyclotetrasiloxane?
2,4,6,8-Tetramethylcyclotetrasiloxane has molecular formula C4H16O4Si4 and molecular weight 240.509 g/mol.
Is 2,4,6,8-Tetramethylcyclotetrasiloxane hazardous?
2,4,6,8-Tetramethylcyclotetrasiloxane has GHS signal word Warning and hazard statements H226 — Flammable liquid and vapour.
What are the upstream and downstream products of 2,4,6,8-Tetramethylcyclotetrasiloxane?
For 2,4,6,8-Tetramethylcyclotetrasiloxane, Upstream Products: Dichloromethylsilane, Water, 2,4,6-trimethylcyclotrisiloxane; Downstream Products: Octamethylsilsesquioxane, β-Methylstyrene, Methoxytrimethylsilane.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2,4,6,8-Tetramethylcyclotetrasiloxane (CAS 2370-88-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-20148-5 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.