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CAS 556-67-2 Octamethylcyclotetrasiloxane molecular structure lightbox
CAS RN: 556-67-2

Octamethylcyclotetrasiloxane

  • Product code: SSC-163528
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Historical Factory Record

Historical Supply Reference

This product has historical factory records. Recorded pack sizes and purity can be used as a supply reference, while project-specific availability is confirmed by inquiry.

  • Pack sizes on record: 500g
  • Available purity: ＞97%
  • Inventory rows with stock: 0
  • Bulk packaging: confirmed by inquiry
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Reference Pack Sizes

Reference pack sizes are shown below. Final availability, packaging and delivery schedule are confirmed by inquiry.

Recorded sizes, purity and stock details for CAS 556-67-2
Pack Size Recorded Purity Available Qty Ship From Inquiry
500g ＞97% 0 Out of Stock Shanghai Inquiry

556-67-2 / 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane

Standard CAS: 556-67-2 Multi CAS: No
Basic Information Physical Properties Computed Properties

Basic Information

CAS
556-67-2
Multi CAS
No
Molecular Formula
C8H24O4Si4
Molecular Weight
296.610000
Exact Mass
296.075165
InChI
InChI=1S/C8H24O4Si4/c1-13(2)9-14(3,4)11-16(7,8)12-15(5,6)10-13/h1-8H3
InChIKey
HMMGMWAXVFQUOA-UHFFFAOYSA-N

Physical Properties

Melting Point
17.5 °C
Boiling Point
175 °C BP: 74 °C at 20 mm Hg
Density
Specific gravity: 0.9558 Relative density (water = 1): 0.96
Physical Description
Liquid Colorless liquid; mp = 17.5 deg C; [ICSC] COLOURLESS OILY LIQUID.
Appearance
Oily liquid Smooth, viscous liquid
State
Liquid

Computed Properties

Structural Parameters

Heavy atom count
16
Fraction Csp3
1
H-bond acceptors
4
Molar refractivity
74.27
TPSA
36.92

LogP / Solubility

WLOGP
2.87
MLOGP
2.54
XLogP3
2.87
Consensus LogP
2.76
Log S (ESOL)
-3.49
Class (ESOL)
Poorly soluble
Log S (Ali)
-4.07
Class (Ali)
Slightly soluble
Log S (SILICOS-IT)
-3.97
Class (SILICOS-IT)
Poorly soluble

ADME

GI absorption
High
BBB permeant
Yes
P-gp substrate
No
CYP1A2 inhibitor
No
CYP2C19 inhibitor
No
CYP2C9 inhibitor
No
CYP2D6 inhibitor
No
CYP3A4 inhibitor
No
Log Kp (skin permeation)
-2.49

Drug-likeness / Medicinal Chemistry

Lipinski
Yes
Ghose
No
Veber
Yes
Egan
Yes
Muegge
Yes
Bioavailability score
0.55
Brenk alerts
1
Leadlikeness
Yes
Synthetic Accessibility
1.5

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