DECAMETHYLTETRASILOXANE

The IUPAC name of Decamethyltetrasiloxane is [dimethyl(trimethylsilyloxy)silyl]oxy-dimethyl-trimethylsilyloxysilane. With the CAS registry number 141-62-8 and EINECS 205-491-7, it is also named asTetrasiloxane, 1,1,1,3,3,5,5,7,7,7-decamethyl-. The product's categories are Siloxanes; Organics; Si (Classes of Silicon Compounds); Si-O Compounds; Organometallic Reagents; Organosilicon. It is colorless or yellowish transparent liquid which is stable under normal temperature and pressure. Additionally, this chemical should be sealed in the container and stored in the cool and dry place.

The other characteristics of this product can be summarized as: (1)ACD/LogP: 6.52; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 6.52; (4)ACD/LogD (pH 7.4): 6.52; (5)ACD/BCF (pH 5.5): 53423.71; (6)ACD/BCF (pH 7.4): 53423.71; (7)ACD/KOC (pH 5.5): 84274.07; (8)ACD/KOC (pH 7.4): 84274.07; (9)#H bond acceptors: 3; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 6; (12)Polar Surface Area: 27.69 Å²; (13)Index of Refraction: 1.411; (14)Molar Refractivity: 88.48 cm³; (15)Molar Volume: 355.6 cm³; (16)Surface Tension: 17.3 dyne/cm; (17)Enthalpy of Vaporization: 41.26 kJ/mol; (18)Vapour Pressure: 0.631 mmHg at 25°C; (19)Rotatable Bond Count: 6; (20)Exact Mass: 310.127201; (21)MonoIsotopic Mass: 310.127201; (22)Topological Polar Surface Area: 27.7; (23)Heavy Atom Count: 17; (24)Complexity: 227.

Preparation of Decamethyltetrasiloxane: It can be obtained by dichloro-dimethyl-silane and chloro-trimethyl-silane. This reaction needs reagent water and solvent toluene at temperature of 20 °C. The reaction time is 27 hours. The yield is 20%.

Uses of Decamethyltetrasiloxane: It is used as MDM in the production of silicone rubber and silicone oil and as FTJ in industrial powder. It also can be used to produce fluoropentamethyldisiloxane, fluoro-trimethyl-silane and difluoro-dimethyl-silane. This reaction needs reagent NaHF₂ at temperature of 120 °C. The reaction time is 9 min. The yield is 34.2%.

When you are using this chemical, please be cautious about it as the following:
It is irritating to eyes, respiratory system and skin, so people should not breathe vapour and avoid contact with skin and eyes. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If you want to contact this product, you must wear suitable gloves and eye/face protection.

People can use the following data to convert to the molecule structure.
1. SMILES:O([Si](C)(C)C)[Si](O[Si](O[Si](C)(C)C)(C)C)(C)C
2. InChI:InChI=1/C10H30O3Si4/c1-14(2,3)11-16(7,8)13-17(9,10)12-15(4,5)6/h1-10H3
3. InChIKey:YFCGDEUVHLPRCZ-UHFFFAOYAR