ASTM D3125-06(2012)

Standard Test Method for Monomethyl Ether of Hydroquinone in Colorless Monomeric Acrylate Esters and Acrylic Acid (Withdrawn 2021)

SIGNIFICANCE AND USE
4.1 Acrylic acid and its esters are normally inhibited with MEHQ only. This procedure presents a rapid and accurate method of determining the MEHQ content of fresh acrylic acid and acrylate esters in the absence of other inhibitors.  
4.2 MEHQ effectiveness may decline with age and this decline in effectiveness may not be indicated by this test method.
SCOPE
1.1 This test method covers the determination of monomethyl ether of hydroquinone2 (MEHQ) in colorless monomeric acrylate esters and acrylic acid. The test method is applicable to the determination of MEHQ in the concentration range from 0 to 1200 parts per million.  
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 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 whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 8.
WITHDRAWN RATIONALE
This test method covered the determination of monomethyl ether of hydroquinone (MEHQ) in colorless monomeric acrylate esters and acrylic acid. The test method was applicable to the determination of MEHQ in the concentration range from 0 to 1200 parts per million.
Formerly under the jurisdiction of Committee D01 on Paint and Related Coatings, Materials, and Applications, this test method was withdrawn in January 2021 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

• Status: Withdrawn
• Publication Date: 31-May-2012
• Withdrawal Date: 24-Jan-2021
• ICS: 71.080.60 - Alcohols. Ethers
• 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: D3125 − 06 (Reapproved 2012)
Standard Test Method for
Monomethyl Ether of Hydroquinone in Colorless Monomeric
1
Acrylate Esters and Acrylic Acid
This standard is issued under the fixed designation D3125; 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.
4
1. Scope* cialty Chemicals (Withdrawn 2009)
1.1 This test method covers the determination of monom-
3. Summary of Test Method
2
ethyl ether of hydroquinone (MEHQ) in colorless monomeric
3.1 As shown in the equation, MEHQ reacts with nitrous
acrylate esters and acrylic acid. The test method is applicable
acid (sodium nitrite in acidic media) to form the nitroso
to the determination of MEHQ in the concentration range from
derivative which equilibrates between two structures.
0 to 1200 parts per million.
1.2 For purposes of determining conformance of an ob-
served 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.
3.2 The yellow color of the nitroso compound is measured
1.3 The values stated in SI units are to be regarded as
spectrophotometrically at a wavelength of 420 nm.
standard. No other units of measurement are included in this
standard.
4. Significance and Use
1.4 For hazard information and guidance, see the supplier’s
4.1 Acrylic acid and its esters are normally inhibited with
Material Safety Data Sheet.
MEHQ only. This procedure presents a rapid and accurate
1.5 This standard does not purport to address all of the method of determining the MEHQ content of fresh acrylic acid
safety concerns, if any, associated with its use. It is the and acrylate esters in the absence of other inhibitors.
responsibility of whoever uses this standard to consult and
4.2 MEHQ effectiveness may decline with age and this
establish appropriate safety and health practices and deter-
decline in effectiveness may not be indicated by this test
mine the applicability of regulatory limitations prior to use.
method.
Specific precautionary statements are given in Section 8.
5. Interferences
2. Referenced Documents
5.1 Hydroquinone (HQ), thiodiphenylamine,
3
2.1 ASTM Standards:
diphenylphenylene-diamine and p-hydroxydiphenylamine in-
D1193 Specification for Reagent Water
terfere if present.
E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications 6. Apparatus
E180 Practice for Determining the Precision of ASTM
6.1 Spectrophotometer, with borosilicate-glass cells for de-
Methods for Analysis and Testing of Industrial and Spe-
termining absorbance at 420 nm.
6.2 Volumetric Flasks, 50 and 100-mL capacity.
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
6.3 Measuring Pipets, 5 and 10-mL capacity.
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.35 on Solvents, Plasticizers, and Chemical Intermediates.
CurrenteditionapprovedJune1,2012.PublishedJuly2012.Originallyapproved
7. Reagents
in 1972. Last previous edition approved in 2006 as D3125 – 06. DOI: 10.1520/
7.1 Purity of Reagents—Reagent grade chemicals shall be
D3125-06R12.
2
IUPAC-approved name is 4-methoxyphenol.
used.Unlessotherwiseindicated,itisintendedthatallreagents
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*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
1

---------------------- Page: 1 ----------------------
D3125 − 06 (2012)
TABLE 1 Amount of Specimen
MEHQ solution into respective 50-mL volumetric flasks.
Expected MEHQ Content, ppm Amount of Specimen, g Dilute each flask to the mark with glacial acetic acid and mix
A
0to25 25 well. A10-mL aliquot of each of these standards contains
A
25 to 100 10
approximately 200, 400, 800, 1200, and 2000 µg of MEHQ,
B
100 to 250 5
B respectively.
250 to 550 2
B
550 to 1000 1
9.2 Determine the absorbance of each of these standards by
A
Weigh to the nearest 10 mg.
pipetting 10-mLaliquots into 50-mLvolumetric flasks contain-
B
Weigh to the nearest 1 mg.
ing20-mLofglacialaceticacid.Toeachflaskadd1-mLof2 %
NaNO solution and dilute to the
...