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Name |
Decamethylcyclopentasiloxane |
EINECS | 208-764-9 |
CAS No. | 541-02-6 | Density | 0.96 g/cm3 |
PSA | 46.15000 | LogP | 3.59200 |
Solubility | Immiscible with water. | Melting Point |
-44 °C |
Formula | C10H30O5 Si5 | Boiling Point | 210 °C at 760 mmHg |
Molecular Weight | 370.773 | Flash Point | 95.6 °C |
Transport Information | N/A | Appearance | liquid |
Safety | 23-24/25 | Risk Codes | 36/37/38 |
Molecular Structure | Hazard Symbols | Xi | |
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;Decamethylcyclopentasiloxane; |
Article Data | 53 |
2,2,4,4,6,6-hexamethyl-8,8-divinylcyclotetrasiloxane
A
octamethylcyclotetrasiloxane
B
decamethylcyclopentasiloxane
D
copoly(dimethylsiloxane/divinylsiloxane), prepared by anionic polymerization of 2,2,4,4,6,6-hexamethyl-8,8-divinylcyclotetrasiloxane; monomer(s): 2,2,4,4,6,6-hexamethyl-8,8-divinylcyclotetrasiloxanecopoly(dimethylsiloxane/divinylsiloxane), prepared by anionic polymerization of 2,2,4,4,6,6-hexamethyl-8,8-divinylcyclotetrasiloxane; monomer(s): 2,2,4,4,6,6-hexamethyl-8,8-divinylcyclotetrasiloxane
Conditions | Yield |
---|---|
With P4-t-Bu at 80℃; for 0.333333h; Further byproducts given; | A n/a B n/a C n/a D 80% |
dimethyl sulfoxide
dimethylsilicon dichloride
A
chloro-methylsulfanyl-methane
B
Hexamethylcyclotrisiloxane
C
octamethylcyclotetrasiloxane
D
decamethylcyclopentasiloxane
E
dodecamethyl-cyclohexasiloxane
Conditions | Yield |
---|---|
at 0℃; Mechanism; other diorganyldichlorosilanes; reactions in the presence of hexamethyldisiloxane, trimethylchlorosilane, tetramethoxysilane, tetraethoxysilane; | A 79% B 48% C 35% D 12% E 5% |
dimethyl sulfoxide
A
chloro-methylsulfanyl-methane
B
Hexamethylcyclotrisiloxane
C
octamethylcyclotetrasiloxane
D
decamethylcyclopentasiloxane
Conditions | Yield |
---|---|
With dimethylsilicon dichloride at 0℃; Further byproducts given; | A 79% B 48% C 35% D 5% |
phenyltrimethylsilyl ether
A
decamethylcyclopentasiloxane
B
dimethyl-diphenoxy-silane
C
C13H26O3Si3
Conditions | Yield |
---|---|
With gallium(III) iodide at 175 - 180℃; for 3h; Yield given; Further byproducts given. Title compound not separated from byproducts; | A n/a B 79% C n/a D n/a |
diiododimethylsilane
A
octamethylcyclotetrasiloxane
B
decamethylcyclopentasiloxane
Conditions | Yield |
---|---|
With 3,3-dimethyl-butan-2-one; zinc In dichloromethane for 0.166667h; Ambient temperature; | A 60% B 18% |
dimethylsilicon dichloride
A
Hexamethylcyclotrisiloxane
B
octamethylcyclotetrasiloxane
C
decamethylcyclopentasiloxane
Conditions | Yield |
---|---|
With pyridine; sodium hydrogencarbonate In ethyl acetate at 20℃; for 3h; | A 60% B 20% C 15% |
With water Autoclave; | A 51.3% B 29.2% C 8% |
With composite catalyst at 150℃; under 675.068 Torr; for 0.5h; Temperature; Pressure; Reagent/catalyst; Large scale; | A n/a B 43% C n/a |
dimethylsilicon dichloride
A
Hexamethylcyclotrisiloxane
B
octamethylcyclotetrasiloxane
C
decamethylcyclopentasiloxane
D
dodecamethyl-cyclohexasiloxane
Conditions | Yield |
---|---|
With dimethyl sulfoxide at 0℃; Further byproducts given; | A 48% B 35% C 12% D 5% |
With tetrahydrofuran; lithium at 40 - 45℃; for 1h; Yield given. Further byproducts given. Yields of byproduct given; | |
With hydrogenchloride In toluene at 20℃; for 4h; Yield given. Further byproducts given. Yields of byproduct given; |
dimethylsilicon dichloride
A
tetradecamethylcycloheptasiloxane
B
Hexamethylcyclotrisiloxane
C
octamethylcyclotetrasiloxane
D
decamethylcyclopentasiloxane
E
dodecamethyl-cyclohexasiloxane
Conditions | Yield |
---|---|
With H2O In water slow addn. of 4l (CH3)2SiCl2 to 12l H2O at 15-20°C withorous stirring; further products;; distn.;; | A n/a B 0.5% C 42% D 6.7% E 1.6% |
With hydrogenchloride In toluene at 20℃; for 4h; Product distribution; diff. concentration of aq. HCl; diff. reaction time; other difunctional organochlorosilanes; | |
With H2O In diethyl ether; water addn. of (CH3)2SiCl2 to ether-H2O; further products;; distn.;; |
dimethylsilicon dichloride
A
octamethylcyclotetrasiloxane
B
decamethylcyclopentasiloxane
Conditions | Yield |
---|---|
With water at 15 - 20℃; Autoclave; | A 42% B 6.7% |
trimethyl phosphite
dimethylsilicon dichloride
A
methylene chloride
B
decamethylcyclopentasiloxane
C
dodecamethyl-cyclohexasiloxane
D
C7H21O6PSi3
E
C9H27O7PSi4
Conditions | Yield |
---|---|
at 20℃; for 10h; Inert atmosphere; | A n/a B 15% C 10% D 38% E 33% |
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 Decamethylcyclopentasiloxane 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.
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.
While dealing with Decamethylcyclopentasiloxane, 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)Std. InChI:InChI=1S/C10H30O5Si5/c1-16(2)11-17(3,4)13-19(7,8)15-20(9,10)14-18(5,6)12-16/h1-10H3 CopyCopied ;
(3)Std. InChIKey:XMSXQFUHVRWGNA-UHFFFAOYSA-N.
Below are the toxicity information of Decamethylcyclopentasiloxane:
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, |