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Thread: are these reagents equivalent?

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    are these reagents equivalent?

    I need to refill the tiny bottle of Phenol Red in my Taylor test kit. The number on the little bottle is R-0004. I thought I was ordering the same thing (from Leslies) and the 2 oz bottle says R-1003J. Its labeled pH Indicator Solution, Phenol Red. Is it the same??

    TIA!

    Heather
    very plain 1966 Rectangle, refiberglassed in distant past, 15K gall, Pentair 320 Cartridge filter
    Dolphin Diagnostics cleaner (the best!)

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    Join Date
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    Coastalish 'down easter'
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    Re: are these reagents equivalent?

    Sorry, I don't think so

    The R0004 supports the acid and base demand tests and I'm pretty sure the others don't.

    The color may turn the right shade for the comparator (again, not sure - the concentration may be off for the water sample size)
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

  3. Back To Top    #3

    Re: are these reagents equivalent?

    GAH!!! And I bought 2 oz to get free shipping!

    I still have some R0004 so I will do a a test with each and compare the results
    very plain 1966 Rectangle, refiberglassed in distant past, 15K gall, Pentair 320 Cartridge filter
    Dolphin Diagnostics cleaner (the best!)

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    JasonLion's Avatar
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    May 2007
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    Re: are these reagents equivalent?

    R-1003J is designed for an 11.5 ml test cell, while R-0004 is designed for a 44 ml test cell, so the concentrations are very different. I'm fairly sure that if you use four times as much R-1003J as you would have used of R-0004 that it will behave the almost exactly the same. A quick test with both reagents should be able to confirm that fairly easily.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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