octamethylcyclotetrasiloxane

Synonyms: "oktamethylcyklotetrasiloxan", "cyclic dimethylsiloxane tetramer", "OMCTS", "union carbide 7207"

Source: octamethylcyclotetrasiloxane is used in cosmetic products.

Identifiers:

IUPAC Name: 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane
CAS Number: 556-67-2
PubChem ID: 11169
InChiKey: HMMGMWAXVFQUOA-UHFFFAOYSA-N
Canonical SMILES: C[Si]1(O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)C

Structural Properties:

Molecular Formula: C₈H₂₄O₄Si₄
Molecular Weight: 296.616

Pharmacophore Features:

Number of bond donors: 0
Number of bond acceptors: 4
Number of atoms different from hydrogen: 16

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2D structure (.sdf)
3D structure (.sdf)
3D structure (.mol2)
3D structure (.pdb)
3D structure (.pdbqt)

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Evidence Supporting This Chemical as an Endocrine Disruptor
TEDX List of Potential Endocrine Disruptors

McKim JM Jr., Wilga PC, Breslin WJ, Plotzke KP, Gallavan RH, Meeks RG. 2001. Potential estrogenic and antiestrogenic activity of the cyclic siloxane octamethylcyclotetrasiloxane (D4) and the linear siloxane hexamethyldisiloxane (HMDS) in immature rats using the uterotrophic assay. Toxicol Sci 63(1):37-46.