Decamethylcyclopentasiloxane

Structural formula

Business number	05KK
Molecular formula	C10H30O5Si5
Molecular weight	370.77
label	Cyclopentamethicone, 2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane

• Numbering system
• Physical property data
• Toxicological data
• Ecological data
• Molecular structure data
• Computing chemical data
• More
  • Properties and Stability
  • Storage method
  • Synthesis method
  • Purpose

Numbering system

CAS number:541-02-6

MDL number:MFCD00046966

EINECS number:208-764-9

RTECS number:GY5945200

BRN number:None

PubChem ID:None

Physical property data

1. Character: colorless liquid

2. Density (g/ cm³,25/4℃):0.956

3 . Relative vapor density (g/cm³,Air=1): Undetermined

4. Melting point (ºC):-44

5. Boiling point (ºC,Normal pressure):101

6. Boiling point (ºC,8kPa): Undetermined

7. Refractive index:1.3980

8. Flash point (ºC):>76

9. Specific optical rotation (º): Undetermined

10. Autoignition point or ignition temperature (ºC): Undetermined

11. Vapor pressure (kPa,25ºC): Undetermined

12. Saturated vapor pressure (kPa ,55.1ºC): Undetermined

13. Heat of combustion (KJ/mol): Undetermined

14. Critical temperature (ºC): Undetermined

15. Critical pressure (KPa): Undetermined

16. Oil and water (octanol/Log value of partition coefficient (water): undetermined

17. Explosion limit (%,V/V): Undetermined

18. Lower explosion limit (%,V/V): Undetermined

19. Solubility:Hardly soluble in water

Toxicological data

1, skin/Eye Irritation Data: StandardDraizeTest rabbit directly In contact with skin: 500mg/24HREACTION SEVERITY：light;

StandardDraizeTest rabbit directly Eye contact: 500mg/24HREACTION SEVERITY：light;

2 , acute toxicity: oral administration to ratsLD50: >64 mL/kg, no details except lethal dose;

Rabbit transdermalLD50: >16 mL/kg, no details except lethal dose;

3 , other multiple dose toxicity data: rat InhalationTCLo:3060 mg/m3 /6H/4W-I, causing changes in blood and liver weight, changes in blood lipid transport and other changes.

Ecological data

This substance may be harmful to the environment, and special attention should be paid to water bodies.

Molecular structure data

1. Molar refractive index: 98.78

2, Molar volume (m³/mol): 384.3

3. isotonic specific volume (90.2K):802.9

4. Surface Tension (dyne/cm):19.0

5. Polarizability（10^-24cm³):39.16

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): None

2. Number of hydrogen bond donors: 0

3. Number of hydrogen bond acceptors: 5

4. Number of rotatable chemical bonds: 0

5. Number of tautomers: none

6. Topological molecule polar surface area 46.2

7. Number of heavy atoms: 20

8. Surface charge: 0

9. Complexity: 258

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain number of atomic stereocenters: 0

13. Determine the number of chemical bond stereocenters: 0

14. Number of uncertain chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability

Use and store according to specifications, no decomposition will occur, and avoid contact with oxides

Storage method

Stored in a cool, dry, well-ventilated warehouse. Keep away from fire and heat sources. Protect from direct sunlight. The packaging is sealed. It should be stored separately from acids and food chemicals, and avoid mixing.��. Suitable materials should be available in the storage area to contain spills.

Synthesis method

None

Purpose

Widely used in cosmetics and body care products, and has good compatibility with most alcohols and other cosmetic solvents Sex