D4H: Tetramethylcyclotetrasiloxane | A Comprehensive Analysis of a High-End Organosilicon Core Intermediate
2026-07-16 16:03
As the global personal care industry transitions toward green and sustainable practices, and as demand for high-performance materials continues to rise in advanced manufacturing sectors such as new-energy vehicles and 5G communications, tetramethylcyclotetrasiloxane (commonly abbreviated as D4H), a key organosilicon intermediate, is attracting growing attention from downstream industries. Our company’s D4H product, model CSGW-H20001, with its high purity—available in two grades, ≥99% and ≥99.5%—reliable supply, and well-defined technical specifications, is widely used in synthetic applications including silicone oils, silicone rubbers, and personal-care lubricants and emollients.
What is tetramethylcyclotetrasiloxane (D4H)?
Tetramethylcyclotetrasiloxane is a cyclic organosilicon compound with CAS No. 2370-88-9 and a molecular weight of 240.51. It appears as a colorless, transparent liquid, with a density of 0.99 g/cm³ at 20°C, a flash point of 24°C, and a boiling point of 135°C. It is insoluble in water but soluble in most organic solvents. These physical properties make it an ideal intermediate for the synthesis of various organosilicon derivatives.
Our D4H product is available in two purity grades—≥99% and ≥99.5—with excellent batch-to-batch consistency, meeting the stringent requirements of applications demanding high purity and reactivity.
Main Technical Specifications
● Product Name: Tetramethylcyclosiloxane / D4H
● Model: CSGW-H20001
● CAS Number: 2370-88-9
● Assay: ≥99% / ≥99.5% (two specifications available)
● Appearance: Colorless, transparent liquid
● Density (20°C): 0.99 g/cm³
● Flash point: 24°C
● Boiling point: 135°C
● Solubility: Insoluble in water; soluble in most organic solvents.
Application areas: from personal care to high-end industrial manufacturing.
1. Green Beauty and Personal Care
In cosmetic formulations, D4H can be used to synthesize lightweight silicone oils and emollient esters, serving as a lubricant and emollient to deliver a fresh, non‑greasy skin feel. With the growing trends toward “clean beauty” and low‑VOC formulations, high‑purity D4H has become an essential choice for formulators seeking to optimize product texture.
2. Synthesis of Silicone Polymers
As an intermediate, D4H is widely used in the production of silicone oils, silicone rubbers, and modified silicone resins. These materials are further employed in applications such as release agents, defoamers, textile auxiliaries, and electronic potting compounds.
3. High-Performance Materials and Emerging Applications
In high-end applications such as thermal management systems for new-energy vehicles, sealing and heat-dissipation materials for 5G base stations, and weather-resistant coatings for aerospace, organosilicon polymers synthesized from D4H exhibit outstanding thermal stability, electrical insulation properties, and chemical resistance.
Leveraging the company’s industry‑wide R&D strengths in organosilicon chemistry, D4H, as a core cyclic hydrogen‑containing intermediate, enables precise control over the number of hydrosilyl groups, addressing the challenges of high impurity levels and limited molecular design inherent in linear hydrogen‑terminated silicones. It is well suited to demanding applications such as clean‑beauty formulations with low residue and high‑end electronic materials that demand exceptional weatherability, helping downstream customers develop green, high‑performance organosilicon end products while aligning with global trends toward low‑carbon, sustainable materials.
Product inquiries (WeChat)
Email: betely@betely.com
Headquarters Address: No. 12, Dongzhou Road, Changshu Economic Development Zone, Jiangsu Province
Service Account
Official Account
在线客服添加返回顶部
页面顺滑的滚动
屏蔽页面上图片的alt/title提示
右侧在线客服样式 1,2,3 3
图片alt标题设置： Betley
表单验证提示文本： Content cannot be empty!
循环体没有内容时： Sorry, no matches were found.
CSS / JS 文件放置地