The number on the label is your guaranty of analysis
SAMPLING OF ANALYTICAL TOOLS Bis-(trimethylsilyl)-acetamirJe (BSA) 5, 5'-Dithiobis-(2-nitrobenzoic acid) (3-carboxy-4-nitrophenyl disulfide, Ellman's Reagent) 1-Dimethyl ami no naphtha le ne5-sulfonyl chloride (dansyl chloride) 8-Hydroxyquinoline (8-quinolinol) Methylene blue, U.S.P. crystals Thenoyltrifluoroacetone [ 4 , 4, 4-trifluoro-l-(2-thienyl)1, 3-butanedione j
No chemical compound
p-Phenylenediamine
is packaged for shipment until
it has
1, 10-Phenanthroline
undergone analysis by our Analytical Department.
Hexamethylenetetramine (methenamine)
The batch number you see on every Aldrich label
Pyridine, reagent Quinoline
is graphic proof of this extra step of protection.
Urea, reagent crystals Ethylenediaminetetraacetic acid [(ethylenedinitrilo)-tetraacetic acid, EDTA]
It is one more reason why thousands of chemists trust the reliability of compounds f r o m Aldrich.
Dimethylglyoxime, disodium salt octahydrate 2, 3-Diaminonaphthalene
Aldrich
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Circle No. 18 on Readers' Service Card VOL.
3 9 , N O . 1 2 , OCTOBER
1967
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