ASTM International - ASTM D4590-09
Standard Test Method for Colorimetric Determination of p-tert-Butylcatechol In Styrene Monomer or AMS (alpha-Methylstyrene) by Spectrophotometry
|Publication Date:||1 June 2009|
|ICS Code (Alcohols. Ethers):||71.080.60|
|ICS Code (Colours and measurement of light):||17.180.20|
significance And Use:
This test method is suitable for determining the quantity of TBC inhibitor, both for the protection against polymerization while in transit and storage, and for internal quality control.
1.1 This test method is applicable to the determination of residual 4-tertiary-butylcate
1.2 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off 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 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. For specific statements on hazards, see Section 8.