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Dimeticone or Dimethicone USP Grade Supplier Exporter Manufacturers' Representative |
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Dimeticone or Dimethicone
CAS Number: 9006-65-9
Molecular Formula: Varies
Molecular Weight: Varies
Dimeticone or Dimethicone
Dimethicone USP Grade Specifications
-(Trimethylsilyl)- -methylpoly[oxy(dimethylsilylene)] CAS 9006-65-9
Dimethicone is a mixture of fully methylated linear siloxane polymers containing repeating units of the formula: [–(CH3)2SiO–]n stabilized with trimethylsiloxy end-blocking units of the formula: [(CH3)3SiO–] wherein n has an average value such that the corresponding nominal viscosity is in a discrete range between 20 and 30,000 centistokes. It contains not less than 97.0 percent and not more than 103.0 percent of polydimethylsiloxane ([–(CH3)2SiO–]n). The requirements for viscosity, specific gravity, refractive index, and loss on heating differ for the several types of Dimethicone, as set forth in the accompanying table.
Identification: Its IR absorption spectrum, obtained as directed in the Assay, exhibits maxima only at the same wavelengths as that of USP Polydimethylsiloxane RS, obtained as directed in the Assay.
Specific gravity: within the limits specified in the accompanying table.
Viscosity: Determine the viscosity of Dimethicone having a nominal viscosity of less than 1000 centistokes at 25 ± 0.1 , using a capillary viscosimeter. Determine the viscosity of Dimethicone having a nominal viscosity of 1000 centistokes or greater at 25 ± 0.1 , using a rotational viscosimeter. The viscosity is within the limits specified in the accompanying table.
Refractive index: within the limits specified in the accompanying table.
Acidity: Dissolve 15.0 g in a mixture of 15 mL of phenylmethane and 15 mL of butyl alcohol, previously neutralized to bromophenol blue and titrate with 0.050 N alcoholic potassium hydroxide to a bromophenol blue endpoint: not more than 0.10 mL is required.
Loss on heating: Preheat an open aluminum vessel (60 mm in diameter and 10 mm high) at 150C for 30 minutes, and allow to cool to room temperature. Tare the vessel, transfer to it about 1 g of Dimethicone, accurately weighed, heat at 150C in a circulating air oven for 2 hours, and allow to come to room temperature in a desiccator before weighing: it loses not more than the maximum percentage of its weight specified in the accompanying table.
Heavy metals: To pass the test (5 microgm per g).
Bacterial endotoxins: To pass the test: equivalent to not more than 10 Endotoxin Units per mL of the Dimethicone taken.
| Nominal Viscosity | viscosity (centistokes) | Specific gravity | Refractive index | Loss on heating |
| (centistokes) | >Min. to <Max. | <Min. to >Max. | <Min. to >Max. | >Max. |
| 20 | 18 to 22 | 0.946 to 0.954 | 1.3980 to 1.4020 | 20.0 |
| 50 | 47.5 to 52.5 | 0.955 to 0.965 | 1.4005 to 1.4045 | 2.0 |
| 100 | 95 to 105 | 0.962 to 0.970 | 1.4005 to 1.4045 | 0.3 |
| 200 | 190 to 220 | 0.964 to 0.972 | 1.4013 to 1.4053 | 0.3 |
| 350 | 332.5 to 367.5 | 0.965 to 0.973 | 1.4013 to 1.4053 | 0.3 |
| 500 | 475 to 525 | 0.967 to 0.975 | 1.4013 to 1.4053 | 0.3 |
| 1000 | 950 to 1050 | 0.967 to 0.975 | 1.4013 to 1.4053 | 0.3 |
| 12,500 | 11,875 to 13,125 | -- | 1.4015 to 1.4055 | 2.0 |
| 30,000 | 27,000 to 33,000 | 0.969 to 0.977 | 1.4010 to 1.4100 | 2.0 |
We also supply Dimeticone BP Ph Eur EP Grade.
Please visit SDS Safety Data Sheet of Dimeticone or Dimethicone Suppliers.
American Molecules, also known as ammol.org is a distributor, supplier and manufacturers' representative of all types of Pharmaceuticals, Functional Ingredients, Excipients and Specialty Chemicals in Texas USA. Our principals manufacture supply and export USP NF BP, Ph Eur, etc grades of chemicals pure and reagent grade, mineral fortifiers, FCC food grade. Tailor made particle size and customized specifications are offered. The principal's facility is having one or more of the certifications like FDA approval and GLP, cGMP, ISO9001, ISO14001, ISO/IEC 17025, ISO22000, FSSC 22000, ISO45001, FSSAI, Kosher, HALAL, COPP, WHO-GMP certified and Written Confirmation (WC) for export to Europe is available. The manufacturers suppliers and exporters observe WHO Good Manufacturing Practices and Good Laboratory Practices.
Suppliers and Manufacturers' Representative:
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Houston, TX 77040, USA
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