ASTM D2379-09

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 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.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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-2009
• 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 D2379-04 - 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-2009

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 − 09
Standard Test Method for
1
Acidity of Formaldehyde Solutions
This standard is issued under the fixed designation D2379; 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* 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
measurements can be used for specification acceptance.
1.2 For purposes of determining conformance of an ob-
served or a calculated value using this test method to relevant
5. Apparatus
specifications, test result(s) shall be rounded off “to the nearest
5.1 Buret, 25-mL, calibrated in 0.1-mL divisions. A TFE-
unit” in the last right-hand digit used in expressing the
fluorocarbon resin stopcock is suitable for this purpose.
specification limit, in accordance with the rounding-off method
of Practice E29.
6. Reagents and Materials
1.3 The values stated in SI units are to be regarded as
6.1 Purity of Reagents—Reagent grade chemicals shall be
standard. No other units of measurement are included in this
used in all tests. Unless otherwise indicated, it is intended that
standard.
all reagents shall conform to the specifications of the Commit-
tee onAnalytical Reagents of theAmerican Chemical Society,
1.4 For hazard information and guidance, see the supplier’s
3
where such specifications are available. Other grades may be
Material Safety Data Sheet.
used, provided it is first ascertained that the reagent is of
1.5 This standard does not purport to address all of the
sufficiently high purity to permit its use without lessening the
safety concerns, if any, associated with its use. It is the
accuracy of the determination.
responsibility of the user of this standard to establish appro-
6.2 Purity of Water—Referencetowatershallbeunderstood
priate safety and health practices and determine the applica-
to mean reagent water conforming to Type IV or better of
bility of regulatory limitations prior to use. Specific hazard
Specification D1193.
statements are given in Section 7.
6.3 Bromthymol Blue Indicator Solution (1.0 g/L)—
2. Referenced Documents
Dissolve 0.1 g of the water-soluble form of bromthymol blue
2
2.1 ASTM Standards:
indicator powder in 100 mL of water.
D1193 Specification for Reagent Water
6.4 Sodium Hydroxide, Standard Solution (0.1 N)—Prepare
D2380 Test Method for Methanol Content of Formaldehyde
and standardize 0.1 N sodium hydroxide (NaOH) solution as
Solutions
described in Practice E200.
E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
7. Hazards
E200 Practice for Preparation, Standardization, and Storage
7.1 Formaldehyde and formaldehyde solutions are hazard-
of Standard and Reagent Solutions for ChemicalAnalysis
ous and exposure to them should be minimized to avoid acute
3. Summary of Test Method
effects and possible sensitization. Consult your supplier’s
Material Safety Data Sheet for specific hazard information.
3.1 A specimen is titrated with standard alkali to the
bromthymol blue end point.
7.2 Sodium hydroxide solutions are corrosive and hazard-
ous. Exercise steps to prevent contact with the skin or eyes.
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
Consult supplier’s Material Safety Data Sheet for specific
and Related Coatings, Materials, andApplications and is the direct responsibility of
hazard.
Subcommittee D01.35 on Solvents, Plasticizers, and Chemical Intermediates.
Current edition approved June 1, 2009. Published June 2009. Originally
3
approved in 1965. Last previous edition approved in 2004 as D2379 – 04. DOI: Reagent Chemicals, American Chemical Society Specifications, American
10.1520/D2379-09. 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
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D2379–04 Designation:D2379–09
Standard Test Method for
1
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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This test method covers the determination of the acidity of commercially available formaldehyde solutions.
1.2The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3For 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 E29.
1.2 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.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D 1193 Specification for Reagent Water
D 2380 Test Method for Methanol Content of Formaldehyde Solutions
E200Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical Analysis
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications Practice for Using
Significant Digits in Test Data to Determine Conformance with Specifications
E 200 Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical Analysis
3. Summary of Test Method
3.1 A specimen is titrated with standard alkali to the bromthymol blue end point.
4. Significance and Use
4.1 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.
5. Apparatus
5.1 Buret, 25-mL, calibrated in 0.1-mL divisions. A TFE-fluorocarbon resin stopcock is suitable for this purpose.
6. Reagents and Materials
6.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all
reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.35 on Solvents, Plasticizers, and Chemical Intermediates.
Current edition approved June 1, 2004.2009. Published June 2004.2009. Originally approved in 1965. Last previous edition approved in 19992004 as
D2379–99.D 2379 – 04.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D2379–09
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such specifications are available. Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high
purity to permit its use without lessening the accuracy of the determination.
6.2 Purity of Water—Unless otherwise indicated, references —Reference to water shall be understood to mean reagent water
conforming to Type IV or better of Specification D 1193.
6.3 Bromthymol Blue Indicator Solution (1.0 g/L)—Dissolve 0.1 g of the water-sol
...