This specification establishes the requirements for AMS (alpha-Methylstyrene). Sampled specimens shall conform to the following physical and chemical properties: minimum AMS content; maximum phenol content; maximum polymer content; inhibitor content; appearance; and color (Pt-Co units).

1.1 This specification covers AMS (α-Methylstyrene).

1.2 The following applies to all limits in this specification: for purposes of determining conformance with this specification, 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 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 Consult current OSHA regulations, suppliers' Material Safety Data Sheets, and local regulations for all materials used in this specification.