1154707

Cyclomethicone 4

United States Pharmacopeia (USP) Reference Standard

• Synonym(s): Octamethylcyclotetrasiloxane
• Linear Formula: [-Si(CH₃)₂O-]₄
• CAS Number: 556-67-2
• Molecular Weight: 296.62
• UNSPSC Code: 41116107
• NACRES: NA.24
• PubChem Substance ID: 329749481
• MDL number: MFCD00003269
• Beilstein/REAXYS Number: 1787074

Properties

• grade: pharmaceutical primary standard
• agency: USP
• vapor density: 1 (vs air)
• API family: cyclomethicone
• form: liquid
• manufacturer/tradename: USP
• refractive index: n20/D 1.396 (lit.)
• bp: 175-176 °C (lit.)
• mp: 17-18 °C (lit.)
• density: 0.956 g/mL at 25 °C (lit.)
• application(s): pharmaceutical (small molecule)
• format: neat
• storage temp.: 2-8°C
• SMILES string: C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1
• InChI: 1S/C8H24O4Si4/c1-13(2)9-14(3,4)11-16(7,8)12-15(5,6)10-13/h1-8H3
• InChI key: HMMGMWAXVFQUOA-UHFFFAOYSA-N

Description

General description

This compound is listed in the SVHC (Substances of very high concern) candidate list of ECHA (European Chemicals Agency)

This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including SDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia.
For further information and support please go to the website of the issuing Pharmacopoeia.

Analysis Note

These products are for test and assay use only. They are not meant for administration to humans or animals and cannot be used to diagnose, treat, or cure diseases of any kind.  ​

Other Notes

Sales restrictions may apply.

Safety Information

• pictograms: GHS02,GHS08,GHS09
• Storage Class: 3 - Flammable liquids
• flash_point_f: 123.8 °F - closed cup
• flash_point_c: 51 °C - closed cup
• signalword: Danger
• hcodes: H226,H361f,H410,EUH441
• pcodes: P201 - P202 - P210 - P273 - P391 - P501
• Hazard Classifications: Aquatic Acute 1 - Aquatic Chronic 1 - Flam. Liq. 3 - PBT - Repr. 2 - vPvB