mattandr3ws
Bluelighter
How long before it starts going bad? As in can't quite test as good as when I first got it?
Thanks A lot
Thanks A lot
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RT&DC Moderators: Senior Staff
Marquis Reagent Question
- Thread starter mattandr3ws
- Start date
augustaB
Bluelighter
My guess is about six months. But that's a guess.
severely etarded
Bluelight Crew
depends on atmospheric conditions really. try getting some sugar and testing it. it should turn brownish black
phase_dancer
Bluelight Crew
I have two bottles here that were shelved intentionally to research aging. They've both been at 25-35* C for 3 and 5 years respectively. Both reagents contain polymerised formaldehyde and both are brown in color. Both react vigorously with sugar.
As mentioned previously, testing with sugar is not a good indication as to reagent quality. Color of reagent is the best guide. Testing with a known drug can also be good indicator.
Freshly made Marquis stored at room temp will last around 4-6 months in this climate (sub tropical) until it changes color. It may still be used for awhile but senistivity is reduced. If stored at ~4 *C it will last much longer. If the reagent contains some methanol, Marquis should last over a year if stored correctly.
As mentioned previously, testing with sugar is not a good indication as to reagent quality. Color of reagent is the best guide. Testing with a known drug can also be good indicator.
Freshly made Marquis stored at room temp will last around 4-6 months in this climate (sub tropical) until it changes color. It may still be used for awhile but senistivity is reduced. If stored at ~4 *C it will last much longer. If the reagent contains some methanol, Marquis should last over a year if stored correctly.
mattandr3ws
Bluelighter
Ok thanks a lot