Expiration Dates for Household Chemicals

Although it isn't stamped with an expiration date, gasoline is only good for about 90 days.
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Some common everyday chemicals last indefinitely, but others have a shelf life. This is a table of expiration dates for several household chemicals. In some cases, the chemicals have a shelf life because the product accumulates bacteria or breaks down into other chemicals, rendering it ineffective or potentially dangerous. In other cases, the expiration date is related to diminished effectiveness over time.

One interesting chemical on the list is gasoline. It's really only good for about 3 months, plus the formulation may change depending on the season.

Expiration Dates for Common Chemicals

ChemicalExpiration Date
air freshener spray2 years
antifreeze, mixed1 to 5 years
antifreeze, concentratedindefinitely
baking powderunopened, indefinitely if properly stored
opened, test by mixing with water
baking sodaunopened, indefinitely if properly stored
opened, test by mixing with vinegar
batteries, alkaline7 years
batteries, lithium10 years
bath gel3 years
bath oil1 year
bleach3 to 6 months
conditioner2 to 3 years
dish detergent, liquid or powder1 year
fire extinguisher, rechargeableservice or replace every 6 years
fire extinguisher, nonrechargeable12 years
furniture polish2 years
gasoline, no ethanolseveral years, if properly stored
gasoline, with ethanolfrom date of manufacture, 90 days
in your gas tank, about a month (2-6 weeks)
hydrogen peroxideunopened, at least one year
opened, 30-45 days
laundry detergent, liquid or powderunopened, 9 months to 1 year
opened, 6 months
metal polish (copper, brass, silver)at least 3 years
Miracle-Gro, liquidunopened, indefinitely
opened, 3 to 8 years
motor oilunopened, 2 to 5 years
opened, 3 months
Mr. Clean2 years
paintunopened, up to 10 years
opened, 2 to 5 years
soap, bar18 months to 3 years
spray paint2 to 3 years
vinegar3-1/2 years
Windex2 years