Difference b/t Taylor R-0004 and R-0014

[mikemass]

Both reagents are "Phenol Red". But I think they are different products. Possibly for different kits.

My kit (don't flame me) is a K-2005. Which contains the R-0014. I was running low last year so I ordered a replacement vial. I never realized until just last night that what I ordered was R-0004. Are these different phenol reds? Because I used both last night and the replacement vial doesn't match ANY color on the K-2005 kit. It turns Orange. See photos:

replacement on left - original on right

Test results with original - 7.3 - 7.4 pH?

Test results with the refill:

 

[Richard320]

They're not interchangeable.

If you use the search box for R-0014 you'll find a whole lot of info.

This thread shows the difference the best still cannot get a bead on my pH

 

[mikemass]

Thanks Richard. That dude had the same issue as me. Now I guess it's me who owes you a beer.