[Spacenova]

At Karl Fischer Titration I want to use sodium-tartarate dihydrate as standard material. Working medium is methanol mostly. I want to standardisation of volumetric solution (Hydranal Composite 2). Sodium tartarate dihydrate is good for this? Maybe it is easiest to handle than liquid standard. Do you have experience about it?

[Arkcon]

At Karl Fischer Titration

I had heard of this, so yes.

I want to use sodium-tartarate dihydrate as standard material.

An acceptable choice.

Working medium is methanol mostly.

It generally is.

I want to standardisation of volumetric solution (Hydranal Composite 2).

Generally a requirement for a day's use, or for the current analyss, depending on your needs for standardization rigor.

Sodium tartarate dihydrate is good for this?

Yes, its sold for this purpose. http://www.sigmaaldrich.com/catalog/product/fluka/34803?lang=en&region=US

Maybe it is easiest to handle than liquid standard. Do you have experience about it?

Seems like it would be better.  I used to standardize with 0.1 mL of H₂O.  That was a little tricky to get right sometimes.