Hi Das 

You can able to check with the following suppliers

Matrix Scientific, USA

HONEST JOY HOLDINGS LIMITED, USA

Hope you get this product from above companies

Good luck

contact iolitec support most of the time they will prepare custom ILs for you and ship it to you. 

Please follow these link of vendors worldwide https://pubchem.ncbi.nlm.nih.gov/compound/150067#section=Chemical-Vendors

Hope it helps. good luck

Thanks every one for their valuable responses.

You are welcome to buy directly from us or through one of our Indian distributors.

When I look for chemicals I usually look under www.chemexper.com

Right now I have checked various websites. And choline dihydrogen phosphate is available in IOLITECH GMBH which asks $65 for the chemical and $70 for transportation which my lab can not afford. So, I am giving up my idea right now. Hope somebody else where in this world with resources will do my experiment of studying monoxygenase in ionic liquid viz. reaction dynamics, kinetics and its out come. My best wishes and heartiest support. Please do it, it may open a new window to the chemistry we know. Any one who wants any help regarding this can contact me, my full support, though very limited will be there. 

attaching synthesis method for ChDHP . at least try once before giving up. 

http://pubs.rsc.org/en/content/articlepdf/2005/cc/b508238b

Hello Mohit

I have tried this technique. But after addition of phosphoric acid I tried to dry the system using freeze dry method. But what I obtained is a heavy liquid which doesn't solidify at -80C even though becomes highly viscous. Its water solubility is also poor. I washed that liquid in acetone it is insoluble in acetone too. I am sending you some of the photographs. It is not solid at room temperature also. I am sending you some of the photographs of this.

How exactly did   you make the Chol DHP? Did you measure the water content? Chol DHP is actually very well water soluble and very hard to dry.

@arunagshu, as boyan ilieve said , ChDHP is highly hygroscopic IL. please write in brief about synthesis procedure that you followed so we can address your problem.

Also give TLCs photo 

Yup

First I have AgNO3 from which I prepare AgO using NaOH added in drops. Next 2gm of Choline chloride is weighed and and dissolved in 10ml water. AgO is added which was previously prepared as described. Chloride presence can be observed as dark brown AgO when added changes to white to greyish white. This observation can help finding out whether there is any chloride left or not. 

Then I added equal equivalent of H3PO4 (as it comes in Merck ortho-Phosphoric Acid bottle)in drops.

The solution is then kept at -80C to cool and solidify and then kept in freeze drier over night to dry up. 

But as I said it actually never solidyfied. At low temparature it becomes highly viscous.

Please inform if I can improve the process.

Regards.

You said it was too expensive for you to buy the IL, but you use a silver salt to make it? Any silver salt is roughly five times more expensive than the IL.

Have you checked the halide or water content? what is your pH? We usually avoid Ag exchange in order to acoid the high cost and big mess that is left behind

The siver nitrate pack comes 8000 INR @ 100gm. Whereas they are asking 22000 INR for 50 gm choline chloride. Above this you have to pay extra to FedEx to release your product from custom house again like 3000INR. 

The pH is generally around 3.2. Halide content was negligible as further addition of AgNO3 to an aliquot gave no trace of milking. 

Yeah Ag exchange is usually costly but that is not the issue right at the moment. I don't want to have Choline hydrogen phosphate in bulk.

do u have NMR spectra of your  compound ?

also try to synthesis using ChBicarbonate or ChOH and respective acid