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 67 40%
4,7-dichloroquinoline yes no 12 33%
Acetic Anhydride yes no 223 38%
BF3%B7Et2O yes no 5 20%
BF3·Et2O yes no 201 35%
BH3·Me2S yes no 97 18%
Cobalt octacarbonyl 95% in hexane yes no 98 24%
Ethyl chloroformate yes no 74 50%
HMPA yes no 173 61%
KHMDS yes no 76 25%
N,N-dimethylaniline yes no 10 60%
N-bromosuccinimide yes no 279 71%
THF yes no 191 82%
acetaldehyde yes no 211 79%
acrylic acid yes no 120 64%
allyl iodide yes no 10 30%
carbon disulfide yes no 105 21%
chlorotrimethylsilane yes no 218 55%
copper(I) salts yes no 160 49%
cyclopentadiene yes no 192 91%
dimethyl acetylenedicarboxylate (DMAD) yes no 43 25%
diphenylacetic acid yes no 59 30%
furfural yes no 9 55%
hmpa yes no 8 50%
isoprene yes no 4 50%
m-CPBA yes no 223 26%
mesyl chloride yes no 198 34%
methyl or ethylchloroformate yes no 164 28%
oxalyl chloride yes no 123 39%
para-toluenesulfonyl chloride yes no 144 32%
pyridine yes no 256 66%
sodium hydride/60% dispersion in mineral oil yes no 257 31%
thf yes no 76 82%
thionyl chloride yes no 252 34%
tri-n-butylphosphine yes no 141 38%
triethylamine/alkylamines in general yes no 281 77%
triflic acid yes no 91 49%
triflic anhydride yes no 136 49%
triphenylphosphine yes no 14 28%
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