ASTM International - ASTM D4590-00
Standard Test Method for Colorimetric Determination of p-tert-Butylcatechol In Styrene Monomer or AMS (alpha-Methylstyrene) by Spectrophotometry
|Publication Date:||10 December 2000|
|ICS Code (Colours and measurement of light):||17.180.20|
|ICS Code (Alcohols. Ethers):||71.080.60|
1.1 This test method is applicable to the determination of residual 4-tertiary-butylcate
1.2 The following applies to all specified limits in this standard: for purposes of determining conformance with this standard, an observed value or a calculated value 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 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 7.