1.1 This specification covers styrene monomer.

1.2 Consult current OSHA regulations and supplier's Material Safety Data Sheets for all materials used in this specification.

1.3 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.