15721-05-8

• 常用中文名：七甲基环四硅氧烷
• 常用英文名：HEPTAMETHYL CYCLOTETRASILOXANE
• CAS号：15721-05-8
• 分子式：C₇H₂₂O₄Si₄
• 分子量：282.589
• 发布时间：2018-05-23 08:00:00
• 更新时间：2025-08-28 11:18:13

名称

• 中文名: 七甲基环四硅氧烷
• 英文名: 2,2,4,4,6,6,8-heptamethyl-1,3,5,7,2,4,6,8λ3-tetraoxatetrasilocane
• 英文别名: Heptamethylcyclotetrasiloxane; 2,4,4,6,6,8,8-Heptamethylcyclotetrasiloxan; 1,3,3,5,5,7,7-Heptamethylcyclotetrasiloxan; 2,2,4,4,6,6,8-Heptamethyl-1,3,5,7,2,4,6,8-tetroxatetrasilocane; Cyclotetrasiloxane, 2,2,4,4,6,6,8-heptamethyl-; CYCLOTETRASILOXANE,HEPTAMETHYL; 1,3,3,5,5,7,7-heptamethylcyclotetrasiloxane; 2,2,4,4,6,6,8-heptamethyl-1,3,5,7,2,4,6,8; Heptamethyl-cyclotetrasiloxan

物化性质

• 密度: 0.958 g/cm3
• 沸点: 174.3±23.0 °C at 760 mmHg
• 熔点: -27ºC
• 分子式: C₇H₂₂O₄Si₄
• 分子量: 282.589
• 闪点: 59.2±22.6 °C
• 精确质量: 282.059509
• PSA: 36.92000
• LogP: 2.02210
• 外观性状: 液体
• 蒸汽压: 1.6±0.3 mmHg at 25°C
• 折射率: 1.3965
• 储存条件: 2-8°C，密封，干燥

毒性和生态

CHEMICAL IDENTIFICATION RTECS NUMBER : GZ4391000 CHEMICAL NAME : Cyclotetrasiloxane, heptamethyl- CAS REGISTRY NUMBER : 15721-05-8 BEILSTEIN REFERENCE NO. : 1786647 LAST UPDATED : 199612 DATA ITEMS CITED : 1 MOLECULAR FORMULA : C7-H22-O4-Si4 HEALTH HAZARD DATA ACUTE TOXICITY DATA TYPE OF TEST : LDLo - Lowest published lethal dose ROUTE OF EXPOSURE : Oral SPECIES OBSERVED : Rodent - mouse DOSE/DURATION : 3 gm/kg TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : 85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,1228,1986

安全

• 风险声明 (欧洲): 10
• 安全声明 (欧洲): 16
• 危险品运输编码: UN 1993
• 海关编码: 2901100000

合成路线

75-54-7 75-78-5 ~60% 15721-05-8

文献：Martynova; Voronkov Russian Journal of Applied Chemistry, 2000 , vol. 73, # 5 p. 921 - 922

75-54-7 3582-71-6 ~5% 15721-05-8

文献：Juengst, Clifford D.; Weber, William P.; Manuel, Georges Journal of Organometallic Chemistry, 1986 , vol. 308, p. 187 - 194

海关

海关编码	2901100000
中文概述	2901100000 饱和无环烃。监管条件:无。增值税率:17.0%。退税率:9.0%。最惠国关税:2.0%。普通关税:30.0%
申报要素	品名, 成分含量, 用途, 用作气体燃料的应报明包装容器容积, 散装货物应报明
Summary	2901100000 saturated acyclic hydrocarbons。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0%