The Tour of Collective Wisdom presents:
Can you use it right out of the bottle?


Some reagents must be purified because they are sold at low purity. Other organic compounds or reagents decompose extremely quickly and cannot be used right out of the bottle; they must be purified often. Finally, some compounds exist as dimers or trimers in the bottle and must be "cracked" prior to use.

Reagent:
Should this reagent be purified before use? yes no
Verification:

Reagent Should this reagent be purified before use? Number of responses Percent who think this reagent should be purified before use
1-Octene yes no 39 41%
Acetic Anhydride yes no 183 38%
BF3·Et2O yes no 165 36%
BH3·Me2S yes no 72 16%
Cobalt octacarbonyl 95% in hexane yes no 82 21%
Ethyl chloroformate yes no 48 54%
HMPA yes no 151 60%
KHMDS yes no 53 22%
N-bromosuccinimide yes no 232 70%
THF yes no 133 82%
acetaldehyde yes no 183 79%
acrylic acid yes no 100 63%
carbon disulfide yes no 85 20%
chlorotrimethylsilane yes no 191 54%
copper(I) salts yes no 128 47%
cyclopentadiene yes no 155 92%
dimethyl acetylenedicarboxylate (DMAD) yes no 24 25%
diphenylacetic acid yes no 41 26%
m-CPBA yes no 185 28%
mesyl chloride yes no 173 34%
methyl or ethylchloroformate yes no 142 28%
oxalyl chloride yes no 92 40%
para-toluenesulfonyl chloride yes no 113 31%
pyridine yes no 215 65%
sodium hydride/60% dispersion in mineral oil yes no 224 31%
thf yes no 36 80%
thionyl chloride yes no 215 32%
tri-n-butylphosphine yes no 121 38%
triethylamine/alkylamines in general yes no 248 78%
triflic acid yes no 68 52%
triflic anhydride yes no 112 50%
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