Cyclopentasiloxane

CAS 541-02-6C10H30O5Si5MW 370.77

Cyclopentasiloxane (CAS 541-02-6) — formula C10H30O5Si5, molecular weight 370.77.

Product Overview

CAS Number	541-02-6
Molecular Formula	C10H30O5Si5
Molecular Weight	370.77
Melting Point	-38 °C
Boiling Point	210 °C

Technical Profile

What this product is

Cyclopentasiloxane is a chemical compound with CAS registry number 541-02-6 and molecular formula C10H30O5Si5 (molecular weight 370.77).

Identification

CAS number: 541-02-6

Its molecular formula C10H30O5Si5 comprises 10 C, 30 H, 5 O, 5 Si atoms.

Also known as: Cyclopentasiloxane · 环五硅氧烷 · CYCLOPENTASILOXANE/D5

Frequently Asked Questions

What is the CAS number of Cyclopentasiloxane?

The CAS registry number of Cyclopentasiloxane is 541-02-6.

What is the molecular formula and molecular weight of Cyclopentasiloxane?

Molecular formula C10H30O5Si5, molecular weight 370.77.

What other names is Cyclopentasiloxane known by?

It is also registered under: Cyclopentasiloxane, 环五硅氧烷, CYCLOPENTASILOXANE/D5.

PubChem Public Data

Independent reference data for Cyclopentasiloxane (CAS 541-02-6), compiled from public chemistry databases.

Registry identifiers across databases

CAS Registry Number	541-02-6
PubChem CID	10913
Molecular formula	C10H30O5Si5
IUPAC name	2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
UNII (FDA)	0THT5PCI0R

Computed descriptors

Molecular Weight	370.77
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	0
Exact Mass	370.09395673
Monoisotopic Mass	370.09395673
Topological Polar Surface Area	46.2
Heavy Atom Count	20

Physicochemical values on record

Boiling Point	210 °C
Melting Point	-38 °C
Flash Point	73 °C (163 °F) - closed cup
Solubility	In water, 1.7X10-2 mg/L at 25 °C
Density	0.9593 g/cu cm at 20 °C
Vapor Pressure	0.2 [mmHg]
Viscosity	3.9 cSt at 25 °C
Surface Tension	18.5 dyne/cm at 25 °C

Documented uses on record

Synonyms and trade names

DECAMETHYLCYCLOPENTASILOXANE; 541-02-6; Cyclomethicone 5; Dimethylsiloxane pentamer; Dow corning 345; Cyclic dimethylsiloxane pentamer; NUC silicone VS 7158; Silicon SF 1202; Ciclopentasiloxane; Cyclomethicone D5; Dekamethylcyklopentasiloxan; D5-sil; KF 995; DTXSID1027184; VS 7158; 0THT5PCI0R

Regulatory listings held on file

Regulatory & Food Contact	FDA Cumulative Estimated Daily Intake (CEDI): FCS DECAMETHYLCYCLOPENTASILOXANE (D5) CIR / INCI: Cosmetics ingredient -> Antioxidant; Conditioning/Emollient; Moisturizing/Humectant; Other (Specify); Preserva CIR / INCI: Cosmetic ingredients (Cyclopentasiloxane) -> CIR (Cosmetic Ingredient Review) CIR / INCI: Hair conditioning; Emollient; Solvent
GHS notification summary	97% (4427 / 4565)

GHS hazard classification

GHS notification summary	97% (4427 / 4565)
Reported hazard statements	H227, H373, H413

This chemical does not meet GHS hazard criteria for 97% (4427 of 4565) of all reports.

Reported as not meeting GHS hazard criteria by 4427 of 4565 companies (only 3% companies provided GHS information). For more detailed information, please visit ECHA C&L website.

What the public record says

CYCLOPENTASILOXANE/D5 · CAS 541-02-6 · C10H30O5Si5. UNII 0THT5PCI0R. Boiling Point: 210 °C; Melting Point: -38 °C; Flash Point: 73 °C (163 °F) - closed cup.

Physical description and handling notes

Source: PubChem / Wikidata; the batch COA governs where values differ.