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Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, also known as D5, is a cyclic siloxane compound consisting of eight silicon atoms and eight oxygen atoms arranged in a complex cyclic structure. It is a member of the siloxane family, which are derivatives of silicones, and is commonly used as a fluid in various industrial applications, such as in the manufacturing of personal care products, lubricants, and sealants. Due to its unique properties, such as low surface tension, high thermal stability, and excellent electrical insulation, D5 has become an important component in many commercial products. However, concerns have been raised about its potential environmental and health impacts, leading to ongoing research and regulatory discussions regarding its use and safety.

281-50-5

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Basic information
1. Product Name: Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane
2. Synonyms: Octa[silsesquioxane](7CI); Hydrogenoctasilsesquioxane; Octa(hydridosilsesquioxane);Octa[silasesquioxane]; Octahydridosilasequioxane; Octahydridosilasesquioxane;Octasilasesquioxane (H8Si8O12)
3. CAS NO:281-50-5
4. Molecular Formula: H8O12 Si8
5. Molecular Weight: 424.74
6. EINECS: N/A
7. Product Categories: N/A
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: N/A
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane(CAS DataBase Reference)
10. NIST Chemistry Reference: Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane(281-50-5)
11. EPA Substance Registry System: Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane(281-50-5)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: N/A
4. WGK Germany:
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 281-50-5(Hazardous Substances Data)

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281-50-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 281-50-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 2,8 and 1 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 281-50:
(5*2)+(4*8)+(3*1)+(2*5)+(1*0)=55
55 % 10 = 5
So 281-50-5 is a valid CAS Registry Number.

281-50-5SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017

1.Identification

1.1 GHS Product identifier

Product name	octasilsesquioxane

1.2 Other means of identification

Product number	-
Other names	octa(hydridosilsesquioxane)

1.3 Recommended use of the chemical and restrictions on use

Identified uses	For industry use only.
Uses advised against	no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number	-
Service hours	Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:281-50-5 SDS

281-50-5Upstream product

281-50-5Downstream Products

112926-00-8 silica gel

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