ASTM D2379-09(2017)

Standard Test Method for Acidity of Formaldehyde Solutions

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.
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 E29.  
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 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Section 7.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 30-Nov-2017
• 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

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 (Reapproved 2017)
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 E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This test method covers the determination of the acidity
E200 Practice for Preparation, Standardization, and Storage
of commercially available formaldehyde solutions.
of Standard and Reagent Solutions for Chemical Analysis
1.2 For purposes of determining conformance of an ob-
served or a calculated value using this test method to relevant
3. Summary of Test Method
specifications, test result(s) shall be rounded off “to the nearest
3.1 A specimen is titrated with standard alkali to the
unit” in the last right-hand digit used in expressing the
bromthymol blue end point.
specification limit, in accordance with the rounding-off method
of Practice E29.
4. Significance and Use
1.3 The values stated in SI units are to be regarded as
4.1 This test method provides a measurement of acidity (as
standard. No other units of measurement are included in this
formic acid) in formaldehyde solutions. The results of these
standard.
measurements can be used for specification acceptance.
1.4 For hazard information and guidance, see the supplier’s
5. Apparatus
Safety Data Sheet.
5.1 Buret, 25-mL, calibrated in 0.1-mL divisions. A TFE-
1.5 This standard does not purport to address all of the
fluorocarbon resin stopcock is suitable for this purpose.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Reagents and Materials
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use. 6.1 Purity of Reagents—Reagent grade chemicals shall be
Specific hazard statements are given in Section 7. used in all tests. Unless otherwise indicated, it is intended that
1.6 This international standard was developed in accor- all reagents shall conform to the specifications of the Commit-
dance with internationally recognized principles on standard-
tee on Analytical Reagents of the American Chemical Society,
3
ization established in the Decision on Principles for the where such specifications are available. Other grades may be
Development of International Standards, Guides and Recom- used, provided it is first ascertained that the reagent is of
mendations issued by the World Trade Organization Technical sufficiently high purity to permit its use without lessening the
Barriers to Trade (TBT) Committee. accuracy of the determination.
6.2 Purity of Water—Reference to water shall be understood
2. Referenced Documents
to mean reagent water conforming to Type IV or better of
2
2.1 ASTM Standards: Specification D1193.
D1193 Specification for Reagent Water
6.3 Bromthymol Blue Indicator Solution (1.0 g/L)—
D2380 Test Method for Methanol Content of Formaldehyde
Dissolve 0.1 g of the water-soluble form of bromthymol blue
Solutions
indicator powder in 100 mL of water.
6.4 Sodium Hydroxide, Standard Solution (0.1 N)—Prepare
and standardize 0.1 N sodium hydroxide (NaOH) solution as
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
described in Practice E200.
and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.35 on Solvents, Plasticizers, and Chemical Intermediates.
Current edition approved Dec. 1, 2017. Published December 2017. Originally
3
approved in 1965. Last previous edition approved in 2009 as D2379 – 09. DOI: Reagent Chemicals, American Chemical Society Specifications, American
10.1520/D2379-09R17. 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D2379 − 09 (2017)
7. Hazards The value of D from Test Method D2380, may be used,
although sp
...

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 − 09 D2379 − 09 (Reapproved 2017)
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*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 E29.
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 supplier’s 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. Specific hazard statements are given in Section 7.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
D2380 Test Method for Methanol Content of Formaldehyde Solutions
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E200 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, 2009Dec. 1, 2017. Published June 2009December 2017. Originally approved in 1965. Last previous edition approved in 20042009 as
D2379 – 04.D2379 – 09. DOI: 10.1520/D2379-09.10.1520/D2379-09R17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’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 (2017)
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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—Reference to water shall be understood to mean reagent water conforming to Type IV or better of
Specification D1193.
6.3 Bromthymol Blue Indicator Solution (1.0 g/L)—Dissolve 0.1 g of the water-soluble form of bromthymol blue indicator
powder in 100 mL of water.
6.4 Sodium Hydroxide, Standard Solution (0.1 N)—Prepare and standardize 0.1 N sodium hydroxide (NaOH) solution as
described in Practice E200.
7. Hazards
7.1 Formaldehyde and form
...