ASTM D2379-04

Standard Test Method for Acidity of Formaldehyde Solutions

SIGNIFICANCE AND USE
This test method provides a measurement of acidity (as formic acid) in formaldehyde solutions. The results of these measurements can be used for specification acceptance.
SCOPE
1.1 This test method covers the determination of the acidity of commercially available formaldehyde solutions.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 For purposes of determining conformance of an observed or a calculated value using this test method to relevant specifications, test result(s) shall be rounded off "to the nearest unit" in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E 29.
1.4 For hazard information and guidance, see the supplier's Material Safety Data Sheet.
1.5 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. Specific hazard statements are given in Section 7.

General Information

• Status: Historical
• Publication Date: 31-May-2004
• ICS: 71.080.80 - Aldehydes and ketones
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.35 - Solvents, Plasticizers, and Chemical Intermediates

Relations

• Replaces: ASTM D2379-99 - Standard Test Method for Acidity of Formaldehyde Solutions
• Effective Date: 01-Jun-2004
• Replaced By: ASTM D2379-09 - Standard Test Method for Acidity of Formaldehyde Solutions
• Effective Date: 01-Jun-2009
• Referred By: ASTM D2378-22 - Standard Specification for Formaldehyde 50 % Grade Uninhibited and 37 % Grade Inhibited and Uninhibited
• Effective Date: 01-Jun-2004

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D2379–04
Standard Test Method for
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Acidity of Formaldehyde Solutions
This standard is issued under the fixed designation D 2379; 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* 4. Significance and Use
1.1 This test method covers the determination of the acidity 4.1 This test method provides a measurement of acidity (as
of commercially available formaldehyde solutions. formic acid) in formaldehyde solutions. The results of these
1.2 The values stated in SI units are to be regarded as the measurements can be used for specification acceptance.
standard. The values given in parentheses are for information
5. Apparatus
only.
5.1 Buret, 25-mL, calibrated in 0.1-mL divisions. A TFE-
1.3 For purposes of determining conformance of an ob-
served or a calculated value using this test method to relevant fluorocarbon resin stopcock is suitable for this purpose.
specifications, test result(s) shall be rounded off “to the nearest
6. Reagents and Materials
unit” in the last right-hand digit used in expressing the
6.1 Purity of Reagents—Reagent grade chemicals shall be
specification limit, in accordance with the rounding-off method
used in all tests. Unless otherwise indicated, it is intended that
of Practice E 29.
all reagents shall conform to the specifications of the Commit-
1.4 For hazard information and guidance, see the supplier’s
tee onAnalytical Reagents of theAmerican Chemical Society,
Material Safety Data Sheet.
3
where such specifications are available. Other grades may be
1.5 This standard does not purport to address all of the
used, provided it is first ascertained that the reagent is of
safety concerns, if any, associated with its use. It is the
sufficiently high purity to permit its use without lessening the
responsibility of the user of this standard to establish appro-
accuracy of the determination.
priate safety and health practices and determine the applica-
6.2 Purity of Water—Unless otherwise indicated, references
bility of regulatory limitations prior to use. Specific hazard
to water shall be understood to mean reagent water conforming
statements are given in Section 7.
to Type IV of Specification D 1193.
2. Referenced Documents
6.3 Bromthymol Blue Indicator Solution (1.0 g/L)—
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Dissolve 0.1 g of the water-soluble form of bromthymol blue
2.1 ASTM Standards:
D 1193 Specification for Reagent Water indicator powder in 100 mL of water.
6.4 Sodium Hydroxide, Standard Solution (0.1 N)—Prepare
D 2380 Test Method for Methanol Content of Formalde-
hyde Solutions and standardize 0.1 N sodium hydroxide (NaOH) solution as
described in Practice E 200.
E 200 Practice for Preparation, Standardization, and Stor-
age of Standard and Reagent Solutions for Chemical
7. Hazards
Analysis
7.1 Formaldehyde and formaldehyde solutions are hazard-
E 29 Practice for Using Significant Digits in Test Data to
ous and exposure to them should be minimized to avoid acute
Determine Conformance with Specifications
effects and possible sensitization. Consult your supplier’s
3. Summary of Test Method
Material Safety Data Sheet for specific hazard information.
7.2 Sodium hydroxide solutions are corrosive and hazard-
3.1 A specimen is titrated with standard alkali to the
bromthymol blue end point. ous. Exercise steps to prevent contact with the skin or eyes.
Consult supplier’s Material Safety Data Sheet for specific
hazard.
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This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.35 on Solvents, Plasticizers, and Chemical Intermediates.
3
Current edition approved June 1, 2004. Published June 2004. Originally Reagent Chemicals, American Chemical Society Specifications, American
approved in 1965. Last previous edition approved in 1999 as D 2379 – 99. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or listed by the American Chemical Society, see Analar Standards for Laboratory
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Standards volume information, refer to the standard’s Document Summary page on and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
the ASTM website. MD.
*A Summary of Changes section appears at the end of this standard.
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