108909-17-7 Usage
General Description
1,1,1,3,5,7,7,7-octamethyltetrasiloxane-3,5-diol is a chemical compound that belongs to the siloxane family. It is an organosilicon compound with a complex molecular structure that contains eight methyl groups and a tetrasiloxane backbone. 1,1,1,3,5,7,7,7-octamethyltetrasiloxane-3,5-diol is commonly used as a building block in the synthesis of silicone polymers and is frequently employed in a variety of industrial and consumer applications. Its unique structure and properties make it useful in the production of a wide range of products, including adhesives, coatings, and personal care products. Additionally, it is known for its low toxicity and chemical inertness, making it a versatile and valuable ingredient in many commercial formulations.
Check Digit Verification of cas no
The CAS Registry Mumber 108909-17-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,8,9,0 and 9 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 108909-17:
(8*1)+(7*0)+(6*8)+(5*9)+(4*0)+(3*9)+(2*1)+(1*7)=137
137 % 10 = 7
So 108909-17-7 is a valid CAS Registry Number.
108909-17-7Relevant articles and documents
ZUR SYNTHESE VON SILOXANEN. IV. ACETOLYSE DER KONFIGURATIONSISOMERE DES 1-CHLOR-1,3,5-TRIMETHYL-3,5-BIS(TRIMETHYLSILOXY)CYCLOTRISILOXANS
Scheim, U.,Ruehlmann, K.,Grosse-Ruyken, H.,Porzel, A.
, p. 39 - 46 (1986)
The acetolysis reaction of 1-chloro-1,3,5-trimethyl-3,5-bis(trimethylsiloxy)cyclotrisiloxane was investigated using 29Si NMR spectroscopy.The three possible configurational isomers, formed in the synthesis, could not be separated.Taking into account the concentration of the three isomers in the mixture, the rate of their acetolysis reactions, the position and the order of the 29Si NMR signals of the chloro- and acetoxycyclotrisiloxane isomers from one set of 29Si NMR data information was obtained on the configuration of the isomers assigned to the NMR signals, the rate constants of the three isomers, and the stereochemistry of the acetolysis reaction.We found that the isomer present in the lowest concentration, showing the largest high field shift and the lowest reactivity has the all-cis configuration, and that the acetolysis reaction proceeds with retention of configuration.