Basic information
- Name:
Cyclopentasiloxane,2,2,4,4,6,6,8,8,10,10-decamethyl-
- Superlist Name:
- Decamethylcyclopentasiloxane
- CAS No.:
541-02-6
- Molecular Structure:
- Formula:
- C10H30O5 Si5
- Molecular Weight:
- 370.85
- Synonyms:
- Cyclopentasiloxane,decamethyl- (6CI,8CI,9CI);Botanisil CP 33;Cyclic dimethylsiloxane pentamer;Cyclo-decamethylpentasiloxane;Cyclopentadimethylsiloxane;Cyclopentasiloxane;DC 345 Fluid;Dow Corning 345 Fluid;Dow Corning 345EU;Execol D5;KF 995;Pentacyclomethicone;SF1202;SH 245 (siloxane);Silbione 70045V5;Silbione V 5;TFS 405;TSF 465;Union Carbide 7158 Silicone Fluid;VS 7158;Volasil 245;VolatileSilicone Fluid 345;
- EINECS:
- 208-764-9
- Density:
- 0.96 g/cm3
- Melting Point:
- -44 °C
- Boiling Point:
- 210 °C at 760 mmHg
- Flash Point:
- 95.6 °C
- Appearance:
- liquid
- Hazard Symbols:
Xi- Risk Codes:
- 36/37/38
- Safety Description:
- 23-24/25 Details
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Specification
The Decamethylcyclopentasiloxane, with the cas register number 541-02-6, has its systematic name of 2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane. This is a kind of liquid, and incompatible with strong oxidizing agents. And its product categories are various, including siloxanes;organics;si (classes of silicon compounds);si-o compounds;organometallic reagents;organosilicon. As to its usage, it is widely applied in the cosmetic and personal nursing care products.
The characteristics of this chemical are as follows: (1)#H bond acceptors: 5; (2)Polar Surface Area: 46.15; (3)Index of Refraction: 1.427; (4)Molar Refractivity: 98.78 cm3; (5)Molar Volume: 384.3 cm3; (6)Polarizability: 39.16 ×10-24 cm3; (7)Surface Tension: 19 dyne/cm; (8)Density: 0.96 g/cm3; (9)Flash Point: 95.6 °C; (10)Enthalpy of Vaporization: 42.81 kJ/mol; (11)Boiling Point: 210 °C at 760 mmHg; (12)Vapour Pressure: 0.285 mmHg at 25°C; (13)Exact Mass: 370.093957; (14)MonoIsotopic Mass: 370.093957; (15)Topological Polar Surface Area: 46.2; (16)Heavy Atom Count: 20; (17)Complexity: 258.
Use of Decamethylcyclopentasiloxane: Decamethylcyclopentasiloxane reacts with chloro-dimethyl-silane to produce 1,13-Dihydrotetradecamethylheptasiloxan, with the following condition: reagent: H2O; catalytic agent: SO2; solution: hexane; yield: 45%; other condition: ambient temperature.
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Production method of Decamethylcyclopentasiloxane: Diiodo-dimethyl-silane reacts with octamethyl-cyclotetrasiloxane to produce Decamethylcyclopentasiloxane, with the following condition: reagent: pinacolone, Zn; solution: CH2Cl2; reaction time: 10 min; yield: 60%; other condition: ambient temperature.
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While dealing with this chemical, you should be very cautious. For being a kind of harmful chemical, it may cause damage to health, and it has limited evidence of a carcinogenic effect. Therefore, you had better wear suitable protective clothing while using this chemical and remember not to breathe dust.
In addition, you could obtain the molecular structure by converting the following datas:
(1)SMILES:O1[Si](O[Si](O[Si](O[Si](O[Si]1(C)C)(C)C)(C)C)(C)C)(C)C
(2)InChI:InChI=1/C10H30O5Si5/c1-16(2)11-17(3,4)13-19(7,8)15-20(9,10)14-18(5,6)12-16/h1-10H3
Below are the toxicity information of this chemical:
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| rabbit | LD50 | skin | > 16mL/kg (16mL/kg) | Toxicology and Applied Pharmacology. Vol. 28, Pg. 313, 1974. | |
| rat | LC | inhalation | > 2700mg/m3/4H (2700mg/m3) | National Technical Information Service. Vol. OTS0572802, | |
| rat | LD50 | oral | > 24134mg/kg (24134mg/kg) | National Technical Information Service. Vol. OTS0572801, |