ASTM D1721-97(2001)

Standard Test Method for Permanganate Time of Tricresyl Phosphate

SCOPE
1.1 This test method covers the detection in tricresyl phosphate of the presence of impurities that reduce potassium permanganate.  
1.2  This standard does not purport to address all of the safety problems, 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.

General Information

• Status: Historical
• Publication Date: 31-Dec-2000
• ICS: 71.080.90 - Phenols
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.35 - Solvents, Plasticizers, and Chemical Intermediates

Relations

• Replaced By: ASTM D1721-97(2007) - Standard Test Method for Permanganate Time of Tricresyl Phosphate (Withdrawn 2012)
• Effective Date: 01-Jun-2007

Standards Content (Sample)

Designation: D 1721 – 97 (Reapproved 2001)
Standard Test Method for
Permanganate Time of Tricresyl Phosphate
This standard is issued under the fixed designation D 1721; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope where such specifications are available. Other grades may be
used, provided it is first ascertained that the reagent is of
1.1 This test method covers the detection in tricresyl phos-
sufficiently high purity to permit its use without lessening the
phate of the presence of impurities that reduce potassium
accuracy of the determination.
permanganate.
5.2 Purity of Water—Unless otherwise indicated, references
1.2 This standard does not purport to address all of the
to water shall be understood to mean reagent water conforming
safety concerns, if any, associated with its use. It is the
to Type IV of Specification D 1193.
responsibility of the user of this standard to establish appro-
5.3 Potassium Permanganate Solution (0.316 g/L)—
priate safety and health practices and determine the applica-
Dissolve 0.316 g of potassium permanganate (KMnO)in
bility of regulatory limitations prior to use. For specific hazard 4
water and dilute to 1 L with freshly boiled water (Note). The
statements, see Section 6.
solution should be stored in brown bottles and be freshly
1.3 For hazard information and guidance, see the supplier’s
prepared weekly as required.
Material Safety Data Sheet.
NOTE 1—Clean glassware is essential to the stability of the KMnO
2. Referenced Documents
solution. Clean graduated cylinders and permanganate storage and han-
dling equipment with concentrated hydrochloric acid (HCl, sp gr 1.19) to
2.1 ASTM Standards:
remove residual manganese oxide (MnO ) which catalyzes reduction of
D 1193 Specification for Reagent Water 2
KMnO . Remove the acid with not less than ten rinsings with water.
3. Significance and Use
6. Hazards
3.1 Impurities such as phenols, if present in tricresyl phos-
6.1 Tricresyl phosphate is hazardous through inhalation or
phate, will react with potassium permanganate, reducing it to
skin absorption. Take care in handling the material. Avoid eye
manganese dioxide. In the permanganate test, the color of the
and skin contact and inhalation of vapors.
test solution is observed at the end of a 30-min period, and if
6.2 Ortho–isomer of tricresyl phosphate is considered toxic.
the pink color is still present, the sample is considered
Trace amounts may be present in tricresyl phosphate speci-
substantially free of oxidizable impurities.
mens.
3.2 The results of this measurement can be used for speci-
fication acceptance.
7. Procedure
7.1 Weigh 10 6 0.1 g of the sample to be tested into a
4. Apparatus
100-mL glass-stoppered graduated cylinder. To this, add 50 mL
4.1 Graduated Cylinders, glass-stoppered, 100-mL capac-
of the KMnO solution. Vigorously shake the mixture for 2
ity.
min, noting the time when the shaking begins. Allow the test to
5. Reagents stan
...