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 65 40%
4,7-dichloroquinoline yes no 11 36%
Acetic Anhydride yes no 220 38%
BF3%B7Et2O yes no 5 20%
BF3·Et2O yes no 200 35%
BH3·Me2S yes no 97 18%
Cobalt octacarbonyl 95% in hexane yes no 98 24%
Ethyl chloroformate yes no 73 50%
HMPA yes no 173 61%
KHMDS yes no 76 25%
N,N-dimethylaniline yes no 9 55%
N-bromosuccinimide yes no 277 71%
THF yes no 186 82%
acetaldehyde yes no 210 79%
acrylic acid yes no 120 64%
allyl iodide yes no 9 22%
carbon disulfide yes no 104 22%
chlorotrimethylsilane yes no 216 55%
copper(I) salts yes no 158 48%
cyclopentadiene yes no 187 90%
dimethyl acetylenedicarboxylate (DMAD) yes no 41 24%
diphenylacetic acid yes no 59 30%
furfural yes no 8 50%
hmpa yes no 7 42%
isoprene yes no 3 33%
m-CPBA yes no 219 26%
mesyl chloride yes no 196 34%
methyl or ethylchloroformate yes no 162 28%
oxalyl chloride yes no 121 38%
para-toluenesulfonyl chloride yes no 143 32%
pyridine yes no 252 66%
sodium hydride/60% dispersion in mineral oil yes no 252 31%
thf yes no 74 82%
thionyl chloride yes no 250 34%
tri-n-butylphosphine yes no 140 37%
triethylamine/alkylamines in general yes no 279 78%
triflic acid yes no 89 49%
triflic anhydride yes no 134 48%
triphenylphosphine yes no 10 20%
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