ISO/R 1900:1971

Ref. No. : ISO/R 1900-1971 (E)
UDC 661 : 547562/563
IS0
FOR STAN DARD IZATl O N
I N T ERN AT I O N A L ORGAN 1 Z AT I O N
i
IS0 RECOMMENDATION
R 1900
PHENOL, û-CRESOL, VZ-CRESOL AND p-CRESOL
FOR INDUSTRIAL USE
DETERMINATION OF RESIDUE ON EVAPORATION
1st EDITION
May 1971
COPYRIGHT RESERVED
The copyright 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
IS0 Recommendation R 1900, Phenol, c-cresol. m-cresol and pcresol for industrial use - Determination
The
of residue on evaporation, was drawn up by Technical Committee ISO/TC 47, Chemistry, the Secretariat of which
is held by the Ente Nazionale Italian0 di Unificazione (UNI).
Work on this question led to the adoption of Draft IS0 Recommendation No. 1900, which was circulated
to all the IS0 Member Bodies for enquiry in November 1969. It was approved, subject to a few modifications of
an editorial nature, by the following Member Bodies :
Israel Spain
Australia
Italy Switzerland
Belgium
Chile Japan Thailand
Czechoslovakia Netherlands Turkey
France New Zealand U.A.R.
Germany Poland United Kingdom
Greece Portugal U.S.S.R.
Hungary Romania
India South Africa, Rep. of
No Member Body opposed the approval of the Draft.
This Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council, which decided
to accept it as an IS0 RECOMMENDATION.
I
-5- ISO/R 1900-1971 (E
I SO Recommendation R 1900 May 1971
PHENOL, OCRESOL, VZ-CRESOL AND p-CRESOL
FOR INDUSTRIAL USE
DETERMINATION OF RESIDUE ON EVAPORATION
WARNING. These materials burn the skin and can be absorbed into the system through the skin. It is essential for
the sampler to wear protective gloves, for example of polyvinyl chloride, and also a face shield. Inhalation of the
vapours from hot material is to be avoided.
Phenols are extremely hygroscopic and care should be taken to avoid contamination with atmospheric or other
moisture.
1. SCOPE AND FIELD OF APPLICATION
This IS0 Recommendation describes a method for the determination of residue on evaporation of phenol,
o-cresol, rn-cresol and p-cresol for industrial use.
2. SAMPLING
Apply the principles given in IS0 Recommendation R . . .*. The following principles should also be observed :
Place the laboratory sample representative of the material taken from the bulk in a clean, dry, dark-coloured,
glass-stoppered bottle of such a size that it is nearly filled by the sample. If it is necessary to seal this bottle, care
should be taken to avoid contaminating the contents.
3. PRINCIPLE
Determination of the mass of residue after evaporation of the test portion, first on a boiling water bath and
then in an oven at 105 OC.
4. APPARATUS
Ordinary laboratory apparatus and
4.1 Basin, of platinum, silica or porcelain, approximately 80 mm in diameter.
4.2 Boiling water bath, with opening of diameter approximately 60 mm.
Oven, capable of being maintained at a temperature of 105 * 2 OC.
4.3
*
Sampling of chemical products will form the subject of a future I
...