What is octamethylcyclotetrasiloxane used for?
Octamethylcyclotetrasiloxane (D4; CAS No. 556-67-2) is used as a monomer in the manufacture of polymeric materials, which are widely used in various industrial and/or medical applications, such as breast implants.
What is another name for octamethylcyclotetrasiloxane?
Octamethylcyclotetrasiloxane
| Names | |
|---|---|
| Preferred IUPAC name Octamethyl-1,3,5,7,2,4,6,8-tetroxatetrasilocane | |
| Other names D4, OMCTS | |
| Identifiers | |
| CAS Number | 556-67-2 |
Is octamethylcyclotetrasiloxane a silicone?
General description. Octamethylcyclotetrasiloxane (D4) is a volatile methylsiloxane (VMS) with a relatively low molecular weight. This silicone fluid has a silicon-oxygen bond in a cyclic arrangement and methyl groups are attached to the silicon atom.
Is octamethylcyclotetrasiloxane volatile?
Octamethylcyclotetrasiloxane (D4) is a volatile cyclic siloxane used primarily as a monomer or intermediate in the production of some silicon-based polymers widely used in industrial and consumer applications and may be present as a residual impurity in a variety of consumer products.
What is D4 silicone?
Octamethylcyclotetrasiloxane (D4) is an odorless, colorless non-oily volatile silicone fluid used primarily to make other silicone materials. During this process, virtually all of the material is consumed, with only a tiny amount of D4 remaining.
What is D4 chemical?
D4 is an odourless, colourless liquid mostly used as an intermediate or basic raw material in the production of silicone rubbers, gels and resins. When used as an intermediate during the manufacturing process, virtually all D4 is consumed with only a tiny amount remaining in final products.
Is Cyclotetrasiloxane good for hair?
The cyclosiloxanes commonly known as cyclotetrasiloxane (D4) and cyclopentasiloxane (D5) are used for their anti-static, emollient, humectant, solvent, viscosity-controlling and hair conditioning properties in cosmetic products.
What is D5 and D6?
D5 can also be used as a dry-cleaning solvent in closed systems, which significantly limits exposure to workers, consumers and the environment. Dodecamethylcyclohexasiloxane (D6), contains six repeating units of silicon (Si) and oxygen (O) atoms in a closed loop, giving it a “cyclic” structure.
What is D4 D5 and D6?
Octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5) and dodecamethylcyclohexasiloxane (D6) are cyclic volatile methyl siloxane (cVMS) substances with four, five and six siloxane groups, respectively. Therefore D4 is also considered as a PBT/vPvB substance.
Is Octamethylcyclotelosiloxane safe?
Octamethylcyclotetrasiloxane is classified as toxic for reproduction category 3. The substance is not regulated in an Annex to the Cosmetics Directive nor has it been evaluated by the Scientific Committee on Cosmetology (SCC) /SCCNFP before.
Is D4 banned?
At the beginning of 2017 the European Commission (EC) proposed to ban Cyclotetrasiloxane (D4) and Cyclopentasiloxane (D5) in rinse-off cosmetic products, with 0.1% or more of either substance. This ban, when officially published, is going to cover products such as shampoos, conditioners, shower gels, etc.
What is D4 or D5?
D4 and D5 are cyclosiloxanes mainly used as monomers for silicone polymer production. They also have a direct use in personal care products. D4 has been identified as a persistent, bioaccumulative and toxic (PBT) and very persistent very bioaccumulative (vPvB) substance. D5 has been identified as a vPvB substance.