Anyone tried the 1-Test ester for IM injections...?

[Pityocamptes]

I was wondering if anyone had tried the ester version in a kit for IM injections. I've tried other PH's with success but have heard some say that the regular version of 1-Test burns when injected. How about the ester version? Hopefully it won't, but oh well, have 20grams on the way to try out. Any experience (not oral)? Thanks.