C8H24O4Si4
296.61 g/mol
cosmetic_ingredientWarning
Cyclotetrasiloxane, octamethyl-
CAS556-67-2EC209-136-7
Category
cosmetic_ingredient
Compound Class
Heterocycle
Primary Use
Cosmetic ingredient and industrial solvent
Octamethylcyclotetrasiloxane is a cyclic organosilicon compound consisting of a four-membered ring of alternating silicon and oxygen atoms, with each silicon bearing two methyl groups. It is primarily used in cosmetics and as an industrial solvent.
cosmetic ingredientindustrial solventpreparation of methyl silicon oils
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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CAS 556-67-2
Related Compounds
StrongStructure SimilarSimilarity 1.00
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ZINC LACTATE
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Cosmetic ingredient for zinc supplements
Referencesame scaffold
2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane
CAS2554-06-5
electronic chemical precursor
Safety Reference
Warning
H410Very toxic to aquatic life with long lasting effects
H226Flammable liquid and vapour
H361Suspected of damaging fertility or the unborn child
H413May cause long lasting harmful effects to aquatic life
Regulatory Compliance1
- EU REACH SVHCEURegulation
Identifiers
IUPAC Name
2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane
InChIKey
HMMGMWAXVFQUOA-UHFFFAOYSA-N
SMILES
C[Si]1(O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)C
Synonyms (22)
- OMCTS
- Cyclomethicone 4, United States Pharmacopeia (USP)
- Cyclomethicone 4
- NUC silicone VS 7207
- Oktamethylcyklotetrasiloxan
- Oktamethylzyklotetrasiloxan
- Silicone SF 1173
- Simethicone Impurity 3
- Union carbide 7207
- octamethyl-cyclotetrasiloxane