In your R&D work. • ·
Trv
PSJF!
that's stable, strong, water-soluble· Try Du Pont Sulfamic Acid. 0 II
0 An unusual, versatile, dry acid...easily handled as non-volatile, nonhygroscopic granules or high-purity crystals; forms nearly odorless aqueous solutions; reacts with organics and inorganics... good reasons to consider Du Pont sulfamic acid for your products or processes. Sulfamic compares with sulfuric and nitric in acid strength...yet it's also a mild, specific sulfating, sulfamating, and sulfonating agent. Keeps its low pH even in weak aqueous solutions; solutions emit no corrosive fumes. Forms highly soluble salts; in normal usage it remains stable both dry and in aqueous solutions.
Little wonder sulfamic acid is so widely used for metal cleaning, hard-water scale removal, paper pulp bleaching, pH control, and electroplating. Wonder what it might do for you?
Use your imagination. Here are some ideastarters when considering Du Pont sulfamic acid: • stabilizes chlorine in water by forming N-chlorosulfamic acid; • behaves as dibasic acid when dissolved in liquid ammonia; • reacts quantitatively with nitrous acid and nitrites; • forms soluble metal salts and corrodes less than most acids; • condenses methylol sulfamates with melamine or urea. See some intriguing possibilities? Try them out with Du Pont sulfamic acid in your own lab.
Write for free sample· It's easy to start running trials on sulfamic acid. We'll send you a free, 1-lb sample of our granular grade. Simply write on your letterhead to E.B.Bell, Du Pont Company, Room 35566 Wilmington, DE 19898. Dis cover how this unusual dry acid can work for you, too.
m^^^^^^^m
m —τ™Τ!^\
" ^\'^ÊÊMÊfiK
ι ,§m
**tt
QUI ΕΛΜΙΓ
oULrAlfllv
ACIDGRAMIIUIH^
Nnsssa
i^-ZO^""
«""-zztzT^zz ^^Λ-^"5.
Hp^
R
EG US PAT8.TM Off
Feb. 21, 1977C&EN
1
