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 70 38%
4,7-dichloroquinoline yes no 14 28%
Acetic Anhydride yes no 225 38%
BF3%B7Et2O yes no 7 14%
BF3·Et2O yes no 203 34%
BH3·Me2S yes no 99 18%
Cobalt octacarbonyl 95% in hexane yes no 99 24%
Ethyl chloroformate yes no 75 49%
HMPA yes no 174 60%
KHMDS yes no 77 24%
N,N-dimethylaniline yes no 11 54%
N-bromosuccinimide yes no 280 71%
THF yes no 193 82%
acetaldehyde yes no 212 79%
acrylic acid yes no 121 63%
allyl iodide yes no 11 27%
carbon disulfide yes no 106 21%
chlorotrimethylsilane yes no 219 54%
copper(I) salts yes no 161 49%
cyclopentadiene yes no 193 90%
dimethyl acetylenedicarboxylate (DMAD) yes no 44 25%
diphenylacetic acid yes no 60 30%
furfural yes no 10 50%
hmpa yes no 9 44%
isoprene yes no 5 40%
m-CPBA yes no 224 26%
mesyl chloride yes no 199 34%
methyl or ethylchloroformate yes no 165 28%
oxalyl chloride yes no 124 38%
para-toluenesulfonyl chloride yes no 145 32%
pyridine yes no 257 65%
sodium hydride/60% dispersion in mineral oil yes no 258 31%
thf yes no 77 81%
thionyl chloride yes no 253 33%
tri-n-butylphosphine yes no 143 37%
triethylamine/alkylamines in general yes no 283 77%
triflic acid yes no 94 48%
triflic anhydride yes no 140 49%
triphenylphosphine yes no 16 25%
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