Cost-effective A/C UV dye for hybrids

In this post Tom Lech (lech auto air condition, very helpful guy!!) recommends two kinds of UV dye.
Can you use R134 instead of R134a refrigerant in a Gen 2 Prius? | PriusChat
Both are expensive.

In this post, Mr. Lech seems to approve using refrigerant plus UV dye (Johnsen’s, product 6313, which costs $14 to $16 for a 12 oz can if you can find it):
AC system maintenance / repair / recharge | PriusChat
Does it contain incompatible oil?

It’s a decent price for a DIY-er fixing one car, and it’s a convenient way to get dye into an empty AC system. No additional injection tools needed – it goes in through the yellow manifold hose. But is this product really OK for our hybrids?

FJC 4921 mentioned in the same topic, post #17, seems to be a good alternative for R134a + dye. It’s a smaller can, only 2 ounces of R134a, so I’d have to add pure R134a afterward to flush the mix through my manifold and hoses.

Background
2007 Prius, 230,000 miles, A/C not working. I’ve never worked on A/C, so I’m trying to be careful. I’ve learned enough to avoid the wrong kinds of compressor oil. I bought gauges/manifold/hoses and a vacuum pump, UV flashlight, etc. from Amazon. No rental gauge kit from Autozone for me – too likely to contaminate my car!

I found that Certified A/C Pro “Universal” UV dye says in fine print “Do not use for electric compressors and/or hybrid vehicles”, so it must contain an incompatible base oil.

Total noob + broken A/C = could be trouble ahead

 

Thanks Tombukt2. I read in another of your posts that you're running regular compressor oil. I think I'll avoid that and stick to approved oils.

System is empty; low and high side gauges read 0. I'm going to pull vacuum on it and see what happens. Hopefully I didn't grind the compressor to shreds during the months that my A/C has been broken.

I learned more about the Johnsen's 6313 R134a + UV dye product. The Johnsen's website is down for maintenance, but the Wayback Machine (web.archive.org) provided me a saved copy of the product webpage. They link a Safety Data Sheet, so I looked at that. Description is "> 99%" refrigerant, no oil at all. Good! Probably @lech auto air conditionin already knew that.

This product is a little hard to find. WalMart has it in a 3-pack, 12 oz per can, online sales only, so I'll buy that. About 50 bucks, so it's almost in my "expensive" category, but at least it's 3 12-oz. cans. Easy to get it into the car through the manifold's yellow hose; no special tools.

The Safety Data Sheets (SDS) are a good resource -- I ruled out a different product, FJC 4921 that way. It contains 1 ounce R134a and 2 ounces "leak detection dye". The SDS says only "Proprietary" for that dye component, so I can't tell if it is hybrid-compatible. Or even if that 2 ounces is an oil of some kind. Not gonna buy that.