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UDC 078.01
Ref. No.: ISO/R 172-1961 (E)
IS0
I NT ERN AT1 ON A L
O RG A N l ZATl ON FOR N D AR D IZ AT I ON
STA
IS0 RECOMMENDATION
R 172
PLASTICS
DETECTION OF FREE AMMONIA
IN PHENOL FORMALDEHYDE MOULDINGS
QUALITATIVE M ETHO D
1st EDITION
February 1961
COPYRIGHT RESERVED
The copyrigh of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations
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BRIEF HISTORY
The IS0 Recommendation R 172, Detection of Free Ammonia in Phenol Formaldehyde
Mouldings. Qualitative Method, was drawn up by Technical Committee ISO/TC 61 , Plastics,
the Secretariat of which is held by the American Standards Association, Incorporated
(ASA).
Work on this matter which the Technical Committee had begun since 1954, came to
an end in 1956, with the adoption of a proposal as a Draft IS0 Recommendation.
On 28 November 1958, the Draft IS0 Recommendation (No. 187) was distributed to
all the IS0 Member Bodies and was approved, subject to some editorial amendments, by
the following Member Bodies :
Australia Hungary Romania
Austria India Spain
Belgium Israel Sweden
Bulgaria Italy Switzerland
Burma Japan Turkey
Netherlands United Kingdom
Czechoslovakia
Poland U.S.A.
France
Germany Portugal U.S.S.R.
No Member Body opposed the approval of the Draft.
The Draft IS0 Recommendation was then submitted by correspondence to the
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