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 59 44%
4,7-dichloroquinoline yes no 7 57%
Acetic Anhydride yes no 213 38%
BF3%B7Et2O yes no 1 100%
BF3·Et2O yes no 193 36%
BH3·Me2S yes no 93 18%
Cobalt octacarbonyl 95% in hexane yes no 95 23%
Ethyl chloroformate yes no 68 50%
HMPA yes no 169 61%
KHMDS yes no 72 22%
N,N-dimethylaniline yes no 5 100%
N-bromosuccinimide yes no 269 71%
THF yes no 177 83%
acetaldehyde yes no 206 79%
acrylic acid yes no 115 63%
allyl iodide yes no 5 40%
carbon disulfide yes no 100 21%
chlorotrimethylsilane yes no 211 55%
copper(I) salts yes no 152 48%
cyclopentadiene yes no 181 91%
dimethyl acetylenedicarboxylate (DMAD) yes no 37 24%
diphenylacetic acid yes no 54 27%
furfural yes no 3 100%
hmpa yes no 3 100%
m-CPBA yes no 210 28%
mesyl chloride yes no 191 34%
methyl or ethylchloroformate yes no 157 29%
oxalyl chloride yes no 114 38%
para-toluenesulfonyl chloride yes no 137 33%
pyridine yes no 246 66%
sodium hydride/60% dispersion in mineral oil yes no 246 31%
thf yes no 66 81%
thionyl chloride yes no 241 33%
tri-n-butylphosphine yes no 135 37%
triethylamine/alkylamines in general yes no 272 77%
triflic acid yes no 84 50%
triflic anhydride yes no 130 49%
triphenylphosphine yes no 3 66%
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