I remember you telling in a post that you wrote MSDS's in the past so..........
If a MSDS shows mixture for the CAS of the base oil does that mean it's not just one base oil in the formulation ? Effectively a mixture of one or more base oils ?
Let's assume three petroleum base oils are mentioned such as 647-blah-blah, etc.
In most cases, it means this is a mix of those base oils so as to arrive at a target viscosity. Each base oil might be a different viscosity so each separate base oil is mixed in proportion to get say 10.5 cSt. Oil A may be a 40 cSt paraffininc oil, oil B may be an 8 cSt parafinninc oil, and oil C might be a naphthenic base oil of 5 cSt to get a 5W30.
IN other cases, this might indicate that any number of base oils from different suppliers may be in the mix at any one time, due to supply/demand, pricing, etc.
See the Question of the Day topic, "Graff Chart."
[ May 18, 2004, 08:05 PM: Message edited by: MolaKule ]
How can I argue with the two answers that are correct but from different angles?
I can't, but I will add that there is some leeway given when the base oils have very similar toxicity data....so a blend of similars can be very hidden...through in some very generic lingo, and what I have been saying it's best to reverse engineer a blend in some other method than the (silly) MSDS's (I know some that were very deceptively written)
One thing I'd add is that as long as a component poses a health or physical (such as combustibility) hazard, it must be listed. There's no exception for proprietary compounds -- they must also be listed as ingredients -- but they may be listed under an anonymous name such as "proprietary lube oil," rather than something more specific like "heavy naphtha distillate, CAS #XXX-XXXXX." Other aspects of that proprietary compound must be revealed as well, such as chemical qualities, fire control, first aid, etc. For that matter, should a medical provider or a health & safety administrator request the identity of a proprietary compound, it MUST be revealed to that party, per federal law.
[ May 19, 2004, 04:29 PM: Message edited by: TC ]
So , again if the base oil is listed as mixture without CAS numbers , it is more than one base oil in the formulation . Blended basestocks of different CAS numbers w/o listing the CAS numbers . Correct ?
As in figuring out if or not a oil , thought to be entirely group II+ and nothing else mixed in for basestock has a MSDS showing mixture it's not entirely the base oil thought to be group II+ only ...... correct ?