ASTM D1721-97(2007)
(Test Method)Standard Test Method for Permanganate Time of Tricresyl Phosphate (Withdrawn 2012)
Standard Test Method for Permanganate Time of Tricresyl Phosphate (Withdrawn 2012)
SIGNIFICANCE AND USE
Impurities such as phenols, if present in tricresyl phosphate, will react with potassium permanganate, reducing it to manganese dioxide. In the permanganate test, the color of the test solution is observed at the end of a 30-min period, and if the pink color is still present, the sample is considered substantially free of oxidizable impurities.
The results of this measurement can be used for specification acceptance.
SCOPE
1.1 This test method covers the detection in tricresyl phosphate of the presence of impurities that reduce potassium permanganate.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 6.
1.3 For hazard information and guidance, see the supplier's Material Safety Data Sheet.
WITHDRAWN RATIONALE
This test method covers the detection in tricresyl phosphate of the presence of impurities that reduce potassium permanganate.
Fromerly under the jurisdiction of Committee D01 on Paint and Related Coatings, Materials, and Applications this test method was withdrawn in July 2012. This standard is being withdrawn without replacement because of lack of interest in tricresyl phosphate for coatings and ink applications.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D1721 − 97 (Reapproved2007)
Standard Test Method for
1
Permanganate Time of Tricresyl Phosphate
This standard is issued under the fixed designation D1721; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Reagents
1.1 This test method covers the detection in tricresyl phos- 5.1 Purity of Reagents—Reagent grade chemicals shall be
phate of the presence of impurities that reduce potassium used in all tests. Unless otherwise indicated, it is intended that
permanganate.
all reagents shall conform to the specifications of the Commit-
tee onAnalytical Reagents of theAmerican Chemical Society,
1.2 The values stated in SI units are to be regarded as
3
where such specifications are available. Other grades may be
standard. No other units of measurement are included in this
used, provided it is first ascertained that the reagent is of
standard.
sufficiently high purity to permit its use without lessening the
1.3 This standard does not purport to address all of the
accuracy of the determination.
safety concerns, if any, associated with its use. It is the
5.2 Purity of Water—Unless otherwise indicated, references
responsibility of the user of this standard to establish appro-
to water shall be understood to mean reagent water conforming
priate safety and health practices and determine the applica-
to Type IV of Specification D1193.
bility of regulatory limitations prior to use. For specific hazard
statements, see Section 6.
5.3 Potassium Permanganate Solution (0.316 g/L)—
1.4 For hazard information and guidance, see the supplier’s
Dissolve 0.316 g of potassium permanganate (KMnO)in
4
Material Safety Data Sheet.
water and dilute to 1 Lwith freshly boiled water (Note 1). The
solution should be stored in brown bottles and be freshly
2. Referenced Documents
prepared weekly as required.
2
2.1 ASTM Standards:
NOTE 1—Clean glassware is essential to the stability of the KMnO
4
D1193 Specification for Reagent Water
solution. Clean graduated cylinders and permanganate storage and han-
dling equipment with concentrated hydrochloric acid (HCl, sp gr 1.19) to
3. Significance and Use
remove residual manganese oxide (MnO ) which catalyzes reduction of
2
KMnO . Remove the acid with not less than ten rinsings with water.
4
3.1 Impurities such as phenols, if present in tricresyl phos-
phate, will react with potassium permanganate, reducing it to
6. Hazards
manganese dioxide. In the permanganate test, the color of the
test solution is observed at the end of a 30-min period, and if 6.1 Tricresyl phosphate is hazardous through inhalation or
the pink color is still present, the sample is considered skin absorption. Take care in handling the material. Avoid eye
substantially free of oxidizable impurities. and skin contact and inhalation of vapors.
3.2 The results of this measurement can be used for speci- 6.2 Ortho–isomer of tricresyl phosphate is considered toxic.
fication acceptance.
Trace amounts may be present in tricresyl phosphate speci-
mens.
4. Apparatus
4.1 Graduated Cylinders, glass-stoppered, 100-mL capac- 7. Procedure
ity.
7.1 Weigh 10 6 0.1 g of the samp
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.