Octamethylcyclotetrasiloxane
Preliminary reference disclaimer
This preliminary safety reference is generated from structured MolGraph catalog fields and public reference-style data. It is not a supplier-issued Safety Data Sheet and should not be used as a substitute for supplier-issued documentation, workplace safety review, transport classification, or regulatory compliance decisions. For supplier SDS or COA, submit a documentation request through MolGraph.
Preliminary safety reference
Available
Supplier-issued SDS
Available by request
COA
Available by RFQ / lot confirmation
Transport classification
Requires shipment review
CAS Number
556-67-2
Chemical name
Octamethylcyclotetrasiloxane
Molecular formula
C8H24O4Si4
Molecular weight
296.61 g/mol
Synonyms
Cyclotetrasiloxane, octamethyl-; Oktamethylcyklotetrasiloxan; OMCTS; Cyclic dimethylsiloxane tetramer; Cyclomethicone 4; NUC silicone VS 7207; Union carbide 7207; Silicone SF 1173; KF 994; SF 1173; UC 7207; VS 7207
InChIKey
HMMGMWAXVFQUOA-UHFFFAOYSA-N
PubChem CID
11169
Signal word
Danger
Catalog reference cue; confirm supplier documentation before use.
Hazard statements
H226, H410, H360
Catalog reference cue; confirm supplier documentation before use.
Melting Point
17.5 °C
Catalog reference value; verify against supplier SDS before use.
Refractive Index
1.3968
Catalog reference value; verify against supplier SDS before use.
Shipment review
Shipment details require review before fulfillment.
Transport classification must be confirmed using supplier SDS and shipment documentation before dispatch.