21 Jun
2023
21 Jun
'23
8:15 a.m.
On 6/21/23 01:50, Christian Corti via cctalk wrote:
On Tue, 20 Jun 2023, Chuck Guzis wrote:
This stuff:
https://pubchem.ncbi.nlm.nih.gov/compound/Decamethylcyclopentasiloxane
The ECHA documents are linked. As far as I can determine, use has been
restricted, not forbidden in the ECHA. The cosmetics industry would
likely go bankrupt without it.
I'm not suggesting that anyone drink it or bathe in it (although it is
used in many shampoos), but then, neither am I suggesting people bathe
in petrol either, although it's useful and carcinogenic.
Manufacturing data shows that at least a hundred million tons of the
stuff is manufactured yearly.
I use it on disks and tapes because it's a lubricant that's both
chemically inert and volatile; that is, after using, it evaporates and
leaves the medium unaffected.
Make your own decisions.
--Chuck
the cookie to a clean jacket after cleaning. If
it's oxide shedding, I
use a couple of drops of cyclomethicone on each side.
Is it essentially the same as silicone oil? Because cyclomethicone is
just a category for three different cyclic siloxanes (D4, D5 and D6),
namely cyclotetrasiloxane, cyclopentasiloxane and cyclohexasiloxane.
D4 and D5 have been put on the ECHA list of forbidden substances in 2018.
So, what exactly do you use? ;-)