Provides N e w Usl Promises M a n y M o r i • While CITRIC ACID is one of the most widely used food acids in the pharmaceutical, food and beverage industries, modern chemical research continues to develop new and varied uses for this versatile acid and its derivatives. CITRIC ACID contains a total of four reactive groups. With these readily substituted radicals, just consider the large number of related but chemically different compounds that can be synthesized! Esterify the carboxyl groups of CITRIC ACID with one
or more alcohols and you obtain a group of valuable plasticizers that are basic raw material for the fabrication of synthetic plastics. React CITRIC ACID with a variety of bases and you can
make normal or acid salts now being widely employed to condition water, and to clean and polish metals. Subtract a molecule of water or carbon dioxide from CITRIC ACID and you get unsaturated dibasic or tribasic
acids which on hydrogenation form new compounds extremely resistant to oxidation. THE SALTS AND ESTERS OF CITRIC ACID
NEW FIELDS OF USE FOR CITRIC ACID A N D ITS DERIVATIVES FIELD Cleaning a n d Plating of Metals
Electrolytic polishing of stainless s t e e l .
Ammonium Citrate Dibasic
Cleaning a n d Plating of Metals
Removes rust a n d scale.
Sodium C i t r a t e
Water Conditioning
Sequesters metallic contaminants.
Calcium C i t r a t e
Construction
Slows t h e setting of cement a n d p l a s t e r .
Citric Acid
1 Triethyl C i t r a t e Plastics Tributyl C i t r a t e Industry 1 Acetyl Triethyl Citrate Acetyl Tributyl ! 1 Citrate
Plasticizers for a w i d e variety of synthetic plastics.
shown in the table to the right are all produced by Pfizer. The uses listed may suggest other applications worthy of your investigation.
I ItaconicAcid 1 (Citric A c i d less C02+H20)
Paint a n d Varnish Industry
PFIZER CITRIC ACID is available as the hydrate or u.s.r. preparation and as ANHYDROUS CITRIC ACID. The latter chemical is identical in purity to CITRIC ACID U.S.P. but
Shortens reaction t i m e , gives h a r d e r finishes, improves color, shortens b a k i n g time o f oil modified alkyds.
1 ItaconicAcid
Plastics Industry
Condensed with glycols o r simply esterified, m a y b e polymerized to f o r m clear h a r d plastics.
1 Aconitic Acid 1 (Citric A c i d less
Plastics Industry
For p r e p a r a t i o n of synthetic resins a n d plasticizers.
Textile
Anti-foaming a g e n t *
contains no water of crystallization. For the latest technical information on this versatile chemical building-block write today to our Technical Service Department. Chas. Pfizer & Co., Inc.; 630 Flushing Avenue, Brooklyn 6, N. Y.; 425 N. Michigan Ave., Chicago 11, Illinois; 605 Third Street, San Francisco 7, California.
J H20) Tributyl C i t r a t e
PFIZER 2968
USE
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