ASTM D2180-89(1995)e1

Standard Test Method for Active Oxygen in Bleaching Compounds

SCOPE
1.1 This test method covers the determination of inorganic "active oxygen" in bleaching compounds such as perborates, percarbonates, and peroxides but not in persulfates or monopersulfates.  
1.2 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. Material Safety Data Sheets are available for reagents and materials. Review them for hazards prior to usage.

General Information

• Status: Historical
• Publication Date: 31-Dec-1994
• Technical Committee: D12 - Soaps and Other Detergents
• Drafting Committee: D12.12 - Analysis and Specifications of Soaps, Synthetics, Detergents and their Components

Relations

• Replaced By: ASTM D2180-89(2003) - Standard Test Method for Active Oxygen in Bleaching Compounds
• Effective Date: 26-May-1989

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
e1
Designation: D 2180 – 89 (Reapproved 1995)
Standard Test Method for
Active Oxygen in Bleaching Compounds
This standard is issued under the fixed designation D 2180; 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.
e NOTE—Keywords were added editorially in February 1995.
1. Scope 5. Interferences
1.1 This test method covers the determination of inorganic“ 5.1 The possibility of interference from organic constitu-
active oxygen” in bleaching compounds such as perborates, ents, which may react with permanganate, must be considered
percarbonates, and peroxides but not in persulfates or monop- with each compound encountered. A sluggish reaction or vague
ersulfates. end point, will suggest interference. Inorganic builders or
1.2 This standard does not purport to address all of the detergents, such as silicates, phosphates, or carbonates, do not
safety concerns, if any, associated with its use. It is the interfere. Organic detergents or wetting agents may interfere.
responsibility of the user of this standard to establish appro- EDTA-type sequestrants do interfere (see Terminology D 459).
priate safety and health practices and determine the applica-
6. Reagents
bility of regulatory limitations prior to use. Material Safety
6.1 Purity of Reagents—Reagent grade chemicals shall be
Data Sheets are available for reagents and materials. Review
them for hazards prior to usage. used in all tests. Unless otherwise indicated, it is intended that
all reagents shall conform to the specifications of the Commit-
2. Referenced Documents
tee on Analytical Reagents of the American Chemical Society,
2.1 ASTM Standards: where such specifications are available. Other grades may be
D 459 Terminology Relating to Soaps and Other Deter- used, provided it is first ascertained that the reagent is of
gents sufficiently high purity to permit its use without lessening the
D 1193 Specification for Reagent Water accuracy of the determination.
6.2 Purity of Water—Unless otherwise indicated, references
3. Terminology
to water shall be understood to mean reagent water conforming
3.1 Definition: to Specification D 1193.
3.1.1 active oxygen—the measure of the oxidizing power of
6.3 Potassium Permanganate, Standard Solution (0.1 N)—
compounds such as inorganic perborates, percarbonates, or Dissolve 3.2 g of potassium permanganate (KMnO )in100
peroxides which, in effect, release hydrogen peroxide in acid
mL of water and dilute the solution with water to 1 L. Allow
solutions. It is expressed in terms of oxygen (O) with gram- the solution to stand in the dark for two weeks and then filter
equivalent weight of 8.00.
through a fine-porosity sintered-glass crucible. Do not wash the
filter. Store the solution in glass-stoppered, amber-colored glass
4. Summary of Test Method
bottles.
4.1 Active oxygen is determined by titration of an acidified
NOTE 2—Do not permit the filtered solution to come into contact with
aqueous solution of the compound with a standard solution of
paper, rubber, or other organic material.
potassium permanganate.
6.3.1 Weigh accurately to the nearest 0.1 mg about 0.3 g
NOTE 1—Use of a molybdate-catalyzed iodometric method for this
standard sodium oxalate (Na C O , previously dried at 105°C).
2 2 4
purpose has been suggested, but the possible reaction of the liberated
Transfer to a 400-mL beaker. Add 250 mL of H SO (5+95),
2 4
iodine on organics present must be considered. It is believed there is less
freshly boiled for at least 10 min and cooled to 27 6 3°C. Stir
likelihood of reaction with permanganate, provided the titration is
until the oxalate has dissolved. Add 0.1 N KMnO solution
performed in such a manner as to avoid any considerable excess of 4
rapidly from a buret (25 to 30 mL/min) while stirring slowly
permanganate.
but constantly until about 40 mL have been added. Let stand
This test method is under the jurisdiction of ASTM Committee D-12 on Soaps
and Other Detergents, and is the direct responsibility of Subcommittee D12.12 on Reagent Chemicals, American Chemical Society Specifications, American
Analysis of Soaps and Synthetic Detergents. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
Current edition approved May 26, 1989. Published July 1989. Originally listed by the American Chemical Society, see Analar Standards for Laboratory
published as D 2180 – 63T. Last previous edition D 2180 – 81 (1987). Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Annual Book of ASTM Standards, Vol 15.04. and National Formulary, U
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