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Standard Test Method for Monomethyl Ether of Hydroquinone in Colorless Monomeric Acrylate Esters and Acrylic Acid
Automatische name übersetzung:
Standard Test Method for Hydrochinonmonomethylether in farblosen Monomere Acrylatester und Acrylsäure
NORM herausgegeben am 1.6.2006
Bezeichnung normen: ASTM D3125-06
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.6.2006
SKU: NS-22552
Zahl der Seiten: 3
Gewicht ca.: 9 g (0.02 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
acrylate esters, acrylic acid, monomeric ester of hydroquinone, ICS Number Code 71.080.60 (Alcohols. Ethers)
Significance and Use | ||||||
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. MEHQ effectiveness may decline with age and this decline in effectiveness may not be indicated by this test method. |
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1. Scope | ||||||
1.1 This test method covers the determination of monomethyl ether of hydroquinone (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 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 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. |
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2. Referenced Documents | ||||||
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