- Purity of Reagent grade chemicals
by chuck/pierre.mit.edu (Chuck Parsons) (Fri, 24 Jan 1992)
by chuck/pierre.mit.edu (Chuck Parsons)
Date: Fri, 24 Jan 1992
I got a catalogue from NASCO in the mail. They have a selection
of chemicals, _but_ they won't sell chemicals to indivduals. They
will sell other stuff to individuals, this is a company geared to
high school science classes. They have microscopes, wall charts
Nasco # 1-800-558-9595 901 Janesville Ave.
P.O. Box 901
Fort Atkinson, Wi. 53538-0901
(Sorry they don't list a non-800 number, if you are not in the
US (NA?) you'll have to call information)
Despite the fact that they won't sell chemicals to individuals
they have some descriptions and prices I thought were interesting.
(From page 231 of the 1992 NASCO Catalog)
Reagent ACS - Meets or surpasses the American Chemical Society
standards of purity.
Reagent - Does not exceed maximum limits of signifcant impurities as
stated. (on label) Does not have ultrastringent requirements
of Reagent ACS.
Laboratory Grade - Equivalent in purity to United States Pharmacopeia
(USP) and National Formulary (NF) listings. However they
are not offered for food, drug, or medicainal use of any kind.
Pratical Grade - Sufficiently high quality for use in many synthesis
and other applications.
Technical Grade - Selected commercial grades, scrupulously clean,
and of reasonable chemical purity. Where usagle, most economical
grade and suitable for educational purposes.
Some sample prices. (but they won't sell it to you...)
(Often several grades are listed, I only list the highest grade, usually
the cheaper grades are only 10-20% less )
CaCO3 (Why buy this? but somebody mentioned it...)
powder, Lab grade 100g $4.85 500g $8.25
Ca(OH)2 powder, Reagent grade 100g $5.15 500g $12.40
CaCl2*2H2O powder, Reagent ACS 100g $6.30 500g $15.65
Na2CO3 anhydrous powder, Reagent ACS 500g $8.05
NaHCO3 powder, Reagent ACS 500g $5.95
NaI crystals, Reagent 25g $6.70 100g $13.50
KI crystals, Reagent ACS 100g $11.65
SrCl2*6H2O granular, Reagent 100g $8.45 500g $25.40
They don't show any MoO3