Replacing reagents in the K2006 kit

[JimK]

Keeping my Taylor reagents inside the house protected from heat and light I've had no issues getting at least 2 seasons out of them.

[chem geek]

See Recognizing a Compromised Reagent from the Taylor website. I list below the chemicals found in various kits, grouped roughly by shelf life based on their content.

Indicator Dyes and FAS-DPD
(most sensitive; replace at least every 2 years if kept in cool dark place; if not cool, replace every year)

• R-0004/R-0014 Phenol red pH indicator dye
  also contains a mix of proprietary chlorine neutralizers (not thiosulfate)
• R-0600 Orthotolidine (OTO), chlorine indicator dye
• R-0870 N, N-diethyl-p-phenylenediamine (DPD)
  powdered indicator dye plus phosphate buffer, EDTA and organic acid
• R-0871 Ferrous ammonium sulfate (FAS), titrant reagent
• R-0008 Bromocresol green and Methyl red, Total Alkalinity (TA) indicator combination dye
• R-0011L 1 - (Calcon indicator), Calcium Hardness (CH) indicator dye

Indeterminate shelf-life play it safe and replace every 2 years

• R-0003 Potassium iodide
  used for combined chlorine (CC) test or total chlorine (TC) tests - sunlight plus oxygen oxidizes it
• R-0007 Sodium thiosulfate, chlorine neutralizer
• R-0012 Ethylenediaminetetraacetic acid (EDTA), Calcium Hardness (CH) titrating reagent -- published shelf-life 18-48 months
• R-0013 Melamine, Cyanuric Acid (CYA) reagent

Acids/Bases
(least sensitive; essentially no degradation)

• R-0005 Hydrochloric acid, acid demand reagent
• R-0006 Sodium hydroxide, base demand reagent
• R-0009 Sulfuric acid, for TA titration
• R-0010 Sodium hydroxide, Calcium Hardness (CH) buffer